An emergency communication method based on quantum key

Abstract

The present invention proposes an emergency communication method based on quantum keys, which realizes high-intensity security protection for "decentralized" + two-way flow of emergency information based on quantum keys, so that the encrypted emergency information is no longer limited to the "central broadcast - terminal reception" model; at the same time, it effectively realizes the balance between data transmission security and real-time availability in the emergency communication scenario.

Description

Technical Field

[0001] The present invention relates to the technical field of secure communication, and particularly to an emergency communication method based on quantum keys. Background Art

[0002] In the field of emergency information secure communication, such as in scenarios like reconnaissance, police dispatch, emergencies, on-site command, etc., there are already some solutions for realizing emergency communication. For example, a Chinese patent document with the application number 201410123519.9 discloses an emergency communication method. In this method, the emergency information publishing end digitally signs and encrypts the hierarchical emergency information, and then the information is sent out in the form of text messages or FM broadcasts through a 2G / 3G communication network; after receiving the text message or FM broadcast signal, the information receiving end decrypts the ciphertext and verifies the integrity of the information through digital signature, and decrypts the plaintext after successful verification. In addition, in order to improve the security of information dissemination, some existing solutions use encryption to transmit emergency information, but either the key is reused, or at most it reaches the level of "one industry, one key" (that is, different service keys are used to protect service data for each service, but the key is still reused during the communication service process). For some "high-value information" that may need to be protected in special emergency situations, there is still room for further improvement in security.

[0003] In terms of the transceiver mode, the existing emergency communication methods mostly adopt the "central broadcast - terminal reception" transceiver mode, where the information can only flow unidirectionally.

[0004] However, in some emergency task scenarios, a decentralized + two-way information flow is required, that is, any networked terminal has the ability to send single or group emergency information to specific or unspecified target terminals. Moreover, the security of the existing digital signature and ordinary encryption and decryption methods is difficult to reach the level of high-standard confidentiality. Summary of the Invention

[0005] In view of this problem, the present invention proposes an emergency communication method based on quantum keys, which realizes high-strength security protection for "decentralized" + two-way flow of emergency information based on quantum keys, so that the encrypted emergency information is no longer limited to the "central broadcast - terminal reception" model; at the same time, it effectively realizes the balance between data transmission security and real-time availability in the emergency communication scenario.

[0006] The emergency communication method based on quantum keys of the present invention may include the following steps:

[0007] Key distribution step: Provide a shared quantum key K between each emergency communication terminal Ti among a plurality of emergency communication terminals and the quantum key supply service network S i ;

[0008] Steps for sending emergency information: Based on automatic or manual triggering, cause the emergency communication terminal T i to use the shared quantum key K i to form the emergency information into encrypted data and send the encrypted data outward; and,

[0009] Steps for receiving emergency information: Receive the encrypted data and use the shared quantum key K i to obtain the emergency information from the encrypted data.

[0010] Further, the key distribution step can be set as: generating a quantum key in the quantum key supply service network S; establishing a wired connection between the quantum key supply service network S and the key injection terminal; and connecting the emergency communication terminal T i to the key injection terminal to obtain the shared quantum key K i .

[0011] Even further, the key distribution step can also include causing the quantum key supply service network S to periodically update the quantum key, thereby updating the shared quantum key K i in the emergency communication terminal T and the quantum key supply service network S i step.

[0012] Further, the key distribution step can be set to cause each emergency communication terminal T i among the multiple emergency communication terminals to have the same shared quantum key K; and, the emergency information sending step is further set to cause one or more of the multiple emergency communication terminals to use the shared quantum key K to form the emergency information into the encrypted data and send the encrypted data outward. i Further still, the emergency information receiving step can be set to cause another or more of the multiple emergency communication terminals to receive the encrypted data and use the shared quantum key K to obtain the emergency information from the encrypted data.

[0013]

[0014] ​Preferably, the emergency information sending step may be further configured as: causing one or more of the multiple emergency communication terminals to generate a random sequence code, sending the random sequence code to the quantum key supply service network S, and submitting an application for using a quantum key; the quantum key supply service network S determines an unused quantum key area according to the application for using a quantum key, sends the start address and end address or the start address and size of the quantum key area to one or more of the multiple emergency communication terminals, and at the same time, corresponds the random sequence code to the quantum key area and marks the quantum key area as used; one or more of the multiple emergency communication terminals form the emergency information into the encrypted data by using the shared quantum key K in the quantum key area corresponding to the random sequence code, and send the encrypted data and the random sequence code out together.

[0015] The emergency information receiving step may be further configured as: another one or more of the emergency communication terminals receive the encrypted data and the random sequence code, and send the random sequence code to the quantum key supply service network S; the quantum key supply service network S sends the start address and end address or the start address and size of the quantum key area to another one or more of the emergency communication terminals according to the random sequence code; another one or more of the emergency communication terminals obtain the emergency information from the encrypted data by using the shared quantum key K in the quantum key area corresponding to the random sequence code.

[0016] Further, the emergency information receiving step may further include the step of causing another one or more of the multiple emergency communication terminals to send the emergency information to the information receiver R through a physical interface.

[0017] Further, the emergency information receiving step may be configured as: causing the quantum key supply service network S to receive the encrypted data, obtaining the emergency information from the encrypted data by using the shared quantum key K, and sending the emergency information to the information receiver R.

[0018] Further, the emergency information receiving step may be configured as:

[0019] causing the information receiver R to receive the encrypted data;

[0020] connecting a security chip storing the shared quantum key K to the information receiver R to provide the shared quantum key K thereto, and causing the information receiver R to obtain the emergency information from the encrypted data by using the shared quantum key K; or

[0021] Connect the security chip storing the shared quantum key K to the information receiver R to receive the encrypted data, obtain the emergency information from the encrypted data by using the shared quantum key K, and send the emergency information to the information receiver R.

[0022] Further, the key distribution step can be set as: making the shared quantum keys of each emergency communication terminal among the multiple emergency communication terminals different from each other;

[0023] The emergency information sending step is further set as: one or more of the multiple emergency communication terminals form the emergency information into the first encrypted data by using the shared quantum key and send out the first encrypted data;

[0024] The emergency information receiving step is further set as: making the quantum key supply service network S receive the first encrypted data, obtain the emergency information from the first encrypted data by using the shared quantum key of one or more of the multiple emergency communication terminals, and form the emergency information into the second encrypted data by using the shared quantum key of another or more of the multiple emergency communication terminals, and send the second encrypted data to another or more of the multiple emergency communication terminals; and, another or more of the multiple emergency communication terminals obtain the emergency information from the second encrypted data by using the shared quantum key.

[0025] Optionally, the emergency information sending step further includes a step of compressing the emergency information before encryption to form compressed emergency information; and, the emergency information receiving step further includes a step of decompressing the compressed emergency information after decryption to obtain the emergency information.

[0026] Preferably, the emergency communication method of the present invention may further include a step of determining the level of the emergency information as one of a first level, a second level, and a third level, wherein:

[0027] When the level of the emergency information is determined to be the first level, a one-time pad encryption method is adopted for the emergency information;

[0028] When the level of the emergency information is determined to be the third level, an industry-specific one-time pad encryption method is adopted for the emergency information;

[0029] When the level of the emergency information is determined to be the second level, according to the remaining amount and consumption rate of the shared quantum key, a one-time pad or an industry-specific one-time pad encryption method is selected for the emergency information.

[0030] Further, when the level of the emergency information is determined to be the second level:

[0031] When the remaining amount of the shared quantum key is greater than a first preset value, select the one-time pad encryption method;

[0032] When the consumption rate of the shared quantum key within the current preset time period is not higher than a second preset value of the average consumption rate of the shared quantum key after the service is initiated, and the remaining amount of the shared quantum key is greater than a third preset value, select the one-time pad encryption method;

[0033] When the remaining amount of the shared quantum key is less than a fourth preset value, select the one-occupation-one-key encryption method.

[0034] Furthermore, in the one-time pad encryption method, when the remaining amount of the shared quantum key is less than a fifth preset value, compress the emergency information before encryption.

[0035] Preferably, the first preset value is 75%, the preset time period is 1 minute, the second preset value is 1 / 3, the third preset value is 50%, the fourth preset value is 50%, and the fifth preset value is 20%.

[0036] Preferably, when switching between the one-time pad encryption method and the one-occupation-one-key encryption method, prompt the user and agree on the address of the shared quantum key for the switched encryption method. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings.

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the following described accompanying drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0039] Figure 1 Schematically shows an example of the key distribution step in the emergency communication method for the present invention;

[0040] Figure 2 Schematically shows a specific embodiment of a second example of the first embodiment of the emergency communication method according to the present invention;

[0041] Figure 3 Schematically shows another specific embodiment of a second example of the first embodiment of the emergency communication method according to the present invention;

[0042] Figure 4Another specific embodiment of the second example of the emergency communication method according to the present invention is schematically shown;

[0043] Figure 5 An example of the second embodiment of the emergency communication method according to the present invention is schematically shown. Detailed Description of the Invention

[0044] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided by way of example in order to fully convey the spirit of the present invention to those skilled in the art to which the present invention pertains. Therefore, the present invention is not limited to the embodiments disclosed herein.

[0045] The emergency communication system according to the present invention may include a quantum key supply service network S and a plurality of emergency communication terminals T i (i = 1,..., n), wherein the quantum key supply service network S and the emergency communication terminal T i each store a shared quantum key K i .

[0046] Figure 1 An example of the key distribution step in the emergency communication method for the present invention is shown.

[0047] In Figure 1 the example, the emergency communication terminal T i can obtain the shared quantum key K from a key injection terminal C j (j = 1,..., m) that is wired to the quantum key supply service network S i .

[0048] For example, the quantum key supply service network S can form a wired connection with one or more key injection terminals C j simultaneously, and each key injection terminal C j can be wired to one or more emergency communication terminals T i simultaneously, so as to inject the quantum key K i into the emergency communication terminal T i . After the injection is completed, the emergency communication terminal T i can be disconnected from the key injection terminal C j , so that the emergency communication terminal T i returns to the free movement state.

[0049] Preferably, to ensure the freshness of the quantum key, the quantum key supply service network S can generate a new quantum key at preset intervals, and the emergency communication terminal T i can obtain the new quantum key K by accessing any one of the key injection terminals C j for example.i 。

[0050] In the first embodiment of the present invention, each emergency communication terminal T i shares the same quantum key K with the quantum key supply service network S i and has the same shared quantum key K.

[0051] At this time, in the emergency information sending step of the present invention, one or more of the emergency communication terminals T will act as the sender, and in an automatic or manually triggered manner, use the shared quantum key K to perform an encryption operation on the emergency information to generate encrypted data and send it outwards.

[0052] Optionally, for example, when the amount of data of the emergency information is large, the emergency communication terminal T acting as the sender can first compress the emergency information to obtain the compressed emergency information, and then use the shared quantum key K to encrypt the compressed emergency information, thereby generating encrypted data.

[0053] In the first example, in the emergency information receiving step, another or more of the emergency communication terminals T will act as the receiver to receive the encrypted data and use the shared quantum key K to decrypt it, thereby obtaining the emergency information.

[0054] Optionally, when the emergency information is in a compressed state, the emergency communication terminal acting as the receiver also needs to perform a decompression process on the compressed emergency information.

[0055] Those skilled in the art can understand that the first example is particularly suitable for certain combat, reconnaissance, or information collection tasks, where task individuals need to exchange and share on-site information in real time, but do not want to be cracked by the enemy. At the same time, this on-site information does not need to be generated manually on-site but is automatically collected or generated by a machine, and is a text with a fixed content format (such as location information) or binary data (such as sound, pictures, videos, etc.), and the receiver is relatively fixed application scenarios.

[0056] In the second example, the emergency communication system may further include an information receiver R.

[0057] Figure 2 Shows a specific embodiment of the second example.

[0058] As Figure 2 shown, in this specific embodiment, in the emergency information receiving step, the quantum key supply service network S receives the encrypted data, decrypts it using the shared quantum key K, and aggregates the emergency information to the information receiver R.

[0059] Optionally, when the emergency information is in a compressed state, the quantum key supply service network S also needs to perform a decompression process on the compressed emergency information.

[0060] Figure 3 Another specific embodiment of the second example is shown, in which the information receiver R, the quantum key supply service network S, and the key injection terminals C1 to Cn are not in the same physical environment.

[0061] As Figure 3 shown, in this specific embodiment, the emergency communication system may further include a secure chip (such as a USB key) with computing functions that stores the shared quantum key K.

[0062] At this time, in the emergency information receiving step, the information receiver R will receive the encrypted data as the receiving party.

[0063] The secure chip is connected to the information receiver R and provides the shared quantum key K to the information receiver R. The information receiver R decrypts the encrypted data using the shared quantum key K to obtain the emergency information. Alternatively, the secure chip is connected to the information receiver R, receives the encrypted data from the information receiver R, decrypts the encrypted data using the shared quantum key K to obtain the emergency information, and sends the emergency information to the information receiver R.

[0064] Optionally, when the emergency information is in a compressed state, the information receiver R or the secure chip also needs to perform decompression processing on the compressed emergency information.

[0065] Figure 4 Another specific embodiment of the second example is shown.

[0066] As Figure 4 shown, in this specific embodiment, in the emergency information receiving step, another one or more of the emergency communication terminals T will receive the encrypted data as the receiving party, decrypt it using the shared quantum key K, obtain the emergency information, and send it to the information receiver R through the physical interface.

[0067] Optionally, when the emergency information is in a compressed state, the emergency communication terminal T as the receiving party also needs to perform decompression processing on the compressed emergency information.

[0068] Those skilled in the art can understand that the second example is particularly suitable for the application scenario where an individual uses a portable device to collect emergency information on-site, and the emergency information finally needs to be collected at the information receiver for further analysis and reference in decision-making, without the need for on-site individuals to exchange data with each other.

[0069] In the first embodiment of the present invention, the encryption and decryption processing of the emergency information can be realized by means of the following process.

[0070] For example, in the emergency information sending step, the emergency communication terminal T as the sender generates a random sequence code and sends the random sequence code to the quantum key supply service network S for applying for the usage range of the quantum key.

[0071] Based on this application, the quantum key supply service network S determines an unmarked quantum key area in the quantum key K according to the key demand, and sends the start address and size or the start address and end address of this area to the emergency communication terminal as the sender; meanwhile, marks this area (for example, marks it as "used") and establishes a corresponding relationship between this random sequence code and the marked area.

[0072] The emergency communication terminal as the sender encrypts the emergency information using the quantum key K in the quantum key area corresponding to the random sequence code and sends the encrypted data and the random sequence code together.

[0073] In the emergency information receiving step, the emergency communication terminal as the receiver receives the encrypted data and the random sequence code, and sends the random sequence code to the quantum key supply service network S for applying for the usage range of the quantum key.

[0074] The quantum key supply service network S determines the corresponding quantum key area according to the random sequence code (for example, by searching) and sends the start address and size or the start address and end address of this quantum key area to the emergency communication terminal as the receiver.

[0075] The emergency communication terminal as the receiver decrypts the encrypted data using the quantum key K in the quantum key area corresponding to the random sequence code to obtain the emergency information.

[0076] In the second embodiment of the present invention, each emergency communication terminal T i and the shared quantum key K of the quantum key supply service network S i can be different from each other.

[0077] Figure 5 Shows an example of an emergency communication system according to the second embodiment.

[0078] As Figure 5 shown, in the emergency information sending step, one or more Ts in the emergency communication terminal T i will act as the sender, and in an automatic or manually triggered manner, use the shared quantum key K i to perform an encryption operation on the emergency information to generate the first encrypted data and send it to the quantum key supply service network S.

[0079] Optionally, for example, when the data volume of the emergency information is large, the emergency communication terminal T as the sender iThe emergency information can be compressed first to obtain compressed emergency information, and then the shared quantum key K can be used i to encrypt the compressed emergency information, thereby generating encrypted data.

[0080] In the emergency information receiving step, the quantum key supply service network S uses the shared quantum key K i to decrypt the first encrypted data to obtain the emergency information (or compressed emergency information), and uses the quantum key K j shared with the emergency communication terminal T j as the receiver to encrypt the emergency information (or compressed emergency information) to generate second encrypted data, and send the second encrypted data to the emergency communication terminal T j .

[0081] The emergency communication terminal T j receives the second encrypted data and uses the shared quantum key K j to decrypt the second encrypted data (or also decompress the compressed emergency information), thereby obtaining the emergency information.

[0082] Furthermore, the emergency communication system of the present invention can also allow the selection of the level of the emergency information to determine the encryption method for the emergency information.

[0083] For example, the level of the emergency information can include a first level (such as a high level), a second level (such as a general level), and a third level (such as a low level).

[0084] In one example, when the emergency information is at a high level, the emergency communication system can encrypt the emergency information in a one-time pad manner; when the emergency information is at a low level, the emergency communication system can encrypt the emergency information in a one-key-per-business manner.

[0085] When the emergency information is at a general level, the emergency communication system can select a one-time pad or a one-key-per-business manner to encrypt the emergency information according to the remaining amount and consumption rate of the shared quantum key.

[0086] Specifically, when the remaining amount of the shared quantum key is greater than a first preset value (preferably 75%), a one-time pad encryption method can be selected.

[0087] It can also select a one-time pad encryption method when the consumption rate of the shared quantum key within the current preset time period (preferably one minute) is not higher than a second preset value (preferably 1 / 3) of the average consumption rate of the shared quantum key after the entire service is initiated, and the remaining amount of the shared quantum key is greater than a third preset value (preferably 50%).

[0088] When the remaining amount of the shared quantum key is less than a fourth preset value (preferably 50%), an encryption method of one encryption key per business can be adopted.

[0089] Furthermore, when the one-time pad encryption method is adopted, if the remaining amount of the shared quantum key is less than a fifth preset value (preferably 20%), the emergency communication terminal will perform compression processing on the emergency information.

[0090] Furthermore, when the encryption method switches between the one-time pad and one encryption key per business, the emergency communication terminal can give a prompt to the user, such as by means of sound, vibration or graphics.

[0091] If it is an encryption form conversion during the business process, before converting from the one-time pad to one encryption key per business, the conversion initiator sends a conversion request to the peer end, including the position (address) of the fixed quantum key to be used after using the one encryption key per business in the whole quantum key. The selection of this position is based on the current usage position of the shared quantum key and its consumption rate, plus the consumption time during the communication between the two parties, and then leaving a sixth preset value (such as 20%) of margin for selection.

[0092] For example, the key usage positions of two current emergency communication terminals T1 and T2 in communication are both at 10000. Since the remaining key amount of terminal T1 is insufficient, terminal T1 sends the position of the fixed key to be used after using the one encryption key per business to terminal T2. Terminal T1 detects that the key consumption amount per second was 100 before, and the round-trip time of the communication between the two parties is 2 seconds. Then T1 sends a request to T2 to agree that after converting to the one encryption key per business, they will use the key at 10000 + 100×2×(1 + 20%) = 10240 for secure communication.

[0093] After T1 and T2 reach an agreement, when the positions of the quantum keys used by both parties are between 10000 and 10240, the one-time pad encryption method is still used to encrypt the communication content of both parties. When the quantum key is used up to the 10240 position, both parties synchronously switch to fixedly using the key at the 10240 address of the quantum key to perform secure communication on the remaining part of this communication.

[0094] If a conversion from one encryption key per business to the one-time pad occurs during the business process, the conversion initiator sends a conversion request to the peer end, including the sequence number of the service data packet at which the conversion starts. After the two parties reach an agreement, starting from the agreed service data packet, along the currently fixedly used quantum key address, continue to perform encryption and decryption on each service data packet in the one-time pad manner downward.

[0095] During the emergency communication process, sometimes it is necessary to balance the high security of information and the usage amount of keys. Coupled with the ever-changing on-site state of emergency communication, there may be problems with either completely using manual settings or completely using program judgment when it comes to how to use keys. This embodiment comprehensively considers factors such as user prediction, on-site judgment, key consumption amount, and consumption rate, enabling the emergency communication terminal to calculate which compression and encryption methods to adopt based on parameter elements, so as to achieve the balanced optimization of various elements and better ensure the confidentiality communication process.

[0096] With the emergency communication method of the present invention, for special emergency communication occasions, high-strength security protection of "decentralized" + two-way flow of emergency information can be achieved based on quantum keys, so that the encrypted emergency information is no longer limited to the "central broadcast - terminal reception" model; at the same time, a balance solution for data transmission security and real-time availability in the emergency communication scenario is also proposed.

[0097] Although the present invention has been described through specific embodiments in combination with the accompanying drawings, those skilled in the art can easily recognize that the above embodiments are merely exemplary and are used to illustrate the principle of the present invention, which will not limit the scope of the present invention. Those skilled in the art can make various combinations, modifications, and equivalent replacements to the above embodiments without departing from the spirit and scope of the present invention.

Claims

1. An emergency communication method based on quantum keys, comprising: Key distribution step: Provide a shared quantum key K between each emergency communication terminal Ti among multiple emergency communication terminals and the quantum key supply service network S i ; Emergency information sending steps: Based on automatic or manual triggering, enable the emergency communication terminal T i Utilize the shared quantum key K i Form the emergency information into encrypted data and send the encrypted data outward; and, Emergency information receiving step: receiving the encrypted data and using the shared quantum key K i Obtaining the emergency information from the encrypted data; Wherein, when the level of the emergency information is determined to be the second level: When the remaining amount of the shared quantum key is greater than a first preset value, select a one-time pad encryption method; When the consumption rate of the shared quantum key within the current preset time period is not higher than a second preset value of the average consumption rate of the shared quantum key after the service is initiated, and the remaining amount of the shared quantum key is greater than a third preset value, select a one-time pad encryption method; When the remaining amount of the shared quantum key is less than a fourth preset value, select a one-encryption-for-one-service encryption method.

2. The emergency communication method according to claim 1, wherein, The key distribution step is further set as: Generate a quantum key in the quantum key supply service network S; Establish a wired connection between the quantum key supply service network S and the key refilling terminal; and, Connect the emergency communication terminal T i to the key injection terminal to obtain the shared quantum key K i .

3. The emergency communication method according to claim 2, wherein, The key distribution step further includes causing the quantum key supply service network S to periodically update the quantum key, so as to update the emergency communication terminal T i and the shared quantum key K in the quantum key supply service network S i .

4. The emergency communication method according to claim 1, wherein: The key distribution step is further configured such that each emergency communication terminal T among the multiple emergency communication terminals i has the same shared quantum key K i therebetween; and The emergency information sending step is further set to cause one or more of the plurality of emergency communication terminals to form the emergency information into the encrypted data by using the shared quantum key K and send out the encrypted data.

5. The emergency communication method according to claim 4, wherein, The emergency information receiving step is further set to cause one or more of the plurality of emergency communication terminals to receive the encrypted data and obtain the emergency information from the encrypted data by using the shared quantum key K.

6. The emergency communication method according to claim 5, wherein, The emergency information sending step is further set to: Cause one or more of the plurality of emergency communication terminals to generate a random sequence code, send the random sequence code to the quantum key supply service network S, and submit a quantum key usage application; The quantum key supply service network S determines an unused quantum key area according to the quantum key usage application, sends the start address and end address or start address and size of the quantum key area to one or more of the plurality of emergency communication terminals, and at the same time corresponds the random sequence code to the quantum key area and marks the quantum key area as used; One or more of the plurality of emergency communication terminals form the emergency information into the encrypted data by using the shared quantum key K in the quantum key area corresponding to the random sequence code, and send out the encrypted data and the random sequence code together; and, the emergency information receiving step is further set to: One or more of the emergency communication terminals receive the encrypted data and the random sequence code, and send the random sequence code to the quantum key supply service network S; The quantum key supply service network S sends the start address and end address or start address and size of the quantum key area to one or more of the emergency communication terminals according to the random sequence code; One or more of the emergency communication terminals obtain the emergency information from the encrypted data by using the shared quantum key K in the quantum key area corresponding to the random sequence code.

7. The emergency communication method according to claim 5, wherein, The emergency information receiving step further includes a step of causing another one or more of the plurality of emergency communication terminals to send the emergency information to an information receiver R through a physical interface.

8. The emergency communication method according to claim 4, wherein, The emergency information receiving step is further configured to: cause the quantum key supply service network S to receive the encrypted data, obtain the emergency information from the encrypted data by using the shared quantum key K, and send the emergency information to the information receiver R.

9. The emergency communication method according to claim 4, wherein, The emergency information receiving step is further configured to: cause the information receiver R to receive the encrypted data; connect a security chip storing the shared quantum key K to the information receiver R to provide the shared quantum key K thereto, and cause the information receiver R to obtain the emergency information from the encrypted data by using the shared quantum key K; or connect a security chip storing the shared quantum key K to the information receiver R to receive the encrypted data, obtain the emergency information from the encrypted data by using the shared quantum key K, and send the emergency information to the information receiver R.

10. The emergency communication method according to claim 1, wherein the key distribution step is further configured to: make the shared quantum keys of each of the plurality of emergency communication terminals different from each other; the emergency information sending step is further configured to: one or more of the plurality of emergency communication terminals form the emergency information into first encrypted data by using the shared quantum key and send the first encrypted data outward; the emergency information receiving step is further configured to: cause the quantum key supply service network S to receive the first encrypted data, obtain the emergency information from the first encrypted data by using the shared quantum key of one or more of the plurality of emergency communication terminals, and form the emergency information into second encrypted data by using the shared quantum key of another one or more of the plurality of emergency communication terminals, send the second encrypted data to another one or more of the plurality of emergency communication terminals; and another one or more of the plurality of emergency communication terminals obtain the emergency information from the second encrypted data by using the shared quantum key.

11. The emergency communication method according to any one of claims 4-10, wherein: the emergency information sending step further includes a step of compressing the emergency information before encryption to form compressed emergency information; and the emergency information receiving step further includes a step of decompressing the compressed emergency information after decryption to obtain the emergency information.

12. The emergency communication method according to any one of claims 1-10, wherein: when the level of the emergency information is determined to be the first level, a one-time pad encryption method is adopted for the emergency information; when the level of the emergency information is determined to be the third level, an industry-specific one-time pad encryption method is adopted for the emergency information.

13. The emergency communication method according to claim 1, wherein, In the one-time pad encryption method, when the remaining amount of the shared quantum key is less than a fifth preset value, the emergency information is compressed before encryption.

14. The emergency communication method according to claim 13, wherein, The first preset value is 75%, the preset time period is 1 minute, the second preset value is 1 / 3, the third preset value is 50%, the fourth preset value is 50%, and the fifth preset value is 20%.

15. The emergency communication method according to claim 1, wherein, When switching between the one-time pad encryption method and the one-industry-one-key encryption method, prompt the user and agree on the address of the shared quantum key for the switched encryption method.

Images