11 results about "BB84" patented technology

The application discloses an encryption method fusing quantum key and post-quantum cryptographic algorithm, and belongs to the technical field of data encryption. The original quantum key is generated by a BB84 protocol QKD device, and a post-quantum key generation seed, a lattice noise scaling factor and a quantum enhanced session base key are obtained through hash derivation; quantum derived mask is generated by combining the original quantum key and the operation data characteristics of the water and power terminal; the quantum mask protection data is obtained by performing XOR preprocessing on the data to be encrypted; based on the post-quantum encryption algorithm, the two-part basic ciphertext is generated by using the above-mentioned seed, parameters and protection data; the original quantum key is divided into pieces to obtain quantum enhanced encryption values, and the two-part ciphertext is subjected to secondary disturbance encryption and XOR processing, thereby forming enhanced ciphertext; and finally, the enhanced ciphertext and the check code are spliced and transmitted to the central control room. Through multi-level encryption and key enhancement, the security and attack resistance of data transmission in the water and power terminal and the like are significantly improved.

The invention discloses an implementation method for fusing a quantum key and a post-quantum cryptographic algorithm, and belongs to the technical field of data encryption. The method comprises the following steps of: generating an original quantum key through BB84 protocol QKD equipment, and generating a seed, a lattice noise scaling factor and a quantum enhancement session base key by a post-quantum key obtained through Hash derivation; generating a quantum derived mask in combination with hydroelectric terminal operation data characteristics and an original quantum key, and performing XOR preprocessing on to-be-encrypted data to obtain quantum mask protection data; based on a post-quantum encryption algorithm, generating two parts of basic ciphertexts by using the seeds, the parameters and the protection data; fragmenting the original quantum key to obtain a quantum enhanced encryption value, and respectively performing secondary disturbance encryption and XOR processing on the two parts of ciphertexts to form enhanced ciphertexts; and finally, the enhanced ciphertext and the check code are spliced and then transmitted to a central control room. According to the invention, through multi-stage encryption and key enhancement, the security and anti-attack capability of data transmission in scenes such as a hydropower terminal and the like are significantly improved.

The invention discloses a dam monitoring system data encryption transmission method based on a quantum key, and belongs to the technical field of data encryption. The method comprises the following steps: generating a basic quantum key based on a BB84 protocol, and partitioning to obtain key segments; collecting multiple types of operation state data of the dam, binding time-space information, and generating a security situation characteristic factor for a data numerical value; a derivative key is generated by combining the space-time binding identifier, the feature factor and the key segment, an independent encryption state key is obtained through disturbance shift, and a joint enhanced key is obtained through multiple rounds of enhancement; and finally, completing data encryption by adopting two types of keys. According to the method, the security of dam monitoring data transmission is improved through a quantum key in combination with a time-space and security situation layered encryption mechanism.

This invention relates to quantum key distribution, specifically to a BB84 quantum key distribution system and method based on passive polarization coding, including a transmitter Alice, a receiver Bob, and a quantum channel. The transmitter Alice includes a passive coding transmitter, which comprises a predictive single-photon source module and a fully passive polarization coding module. The predictive single-photon source module generates signal-idle single-photon pairs. The signal photon is detected by a single-photon detector, and its detection event serves as the prediction time reference for the entire system. The idle photon enters the fully passive polarization coding module. The fully passive polarization coding module randomly assigns the idle photon to the corresponding optical path and maps it to one of the four polarization states of BB84 within the optical path, while making each polarization state correspond to a fixed time delay, forming a time delay tag. The technical solution provided by this invention can effectively overcome the shortcomings of existing technologies that are difficult to simultaneously achieve complete passivity, high security, low system complexity, and engineering practicality.

The present invention relates to a system for encoding and correcting the polarization state of the BB84 protocol that implements a method of measuring polarization errors based on performing measurements prior to an information transmission step, which method is applicable to any system in which quantum key distribution (QKD) is to be implemented.

The application discloses a kind of big dam monitoring system data encryption transmission methods based on quantum key, belong to data encryption technical field.The application is based on BB84 protocol first to generate basic quantum key and block to obtain key segment;Collect big dam multi-class operating state data and bind space-time information, generate security posture characteristic factor for data value;Derivative key is generated in combination with space-time binding identifier, characteristic factor and key segment, independent encrypted state key is obtained by perturbation shift, combined enhanced key is obtained by multiple rounds of enhancement;Finally, two types of keys are used to complete data encryption.The application improves the security of big dam monitoring data transmission through the layered encryption mechanism of quantum key combined with space-time and security posture.

The application provides a novel arbitration quantum signature method based on Bell states, which is used for improving the security performance of AQS; the steps are as follows: firstly, a specific Bell state is encoded by the hash function output value of a message; secondly, the signature sender, the signature receiver and the arbitration management party exchange the encoded Bell state sequence in a specific way; the signature sender and the signature receiver respectively encrypt the measured results of the exchanged Bell state by using different keys, and send the ciphertext to the arbitration management party; finally, the arbitration management party verifies the signature legality by searching a specific table. The application performs digital signature based on Bell quantum states, BB84 protocol and quantum one-time encryption and decryption algorithm, and has formal security proof.

The application discloses a kind of measurement equipment independent quantum conversation methods with bidirectional identity authentication function, the method is mutually authenticated whether communication two sides are legal collaborators, then directly utilize quantum channel to mutually converse each other.Communication two sides Alice and Bob mutually share a set of identity keys by BB84 protocol, Alice and Bob are only responsible for preparing entangled photon pair and single photon, and performing encoding operation to photon, all measurement tasks are completed by third party measurement end Charlie.Alice and Bob can verify the identity of two sides according to the Bell state analysis result of Charlie, determine as the legal party of communication, and complete bidirectional communication after that.The application first applies bidirectional identity authentication technology to MDI-QD field, can resist the impersonation attack of eavesdropper, and by completing measurement task by third party, can effectively resist all attacks to imperfect measurement equipment, enhance the security of two-way identity authentication code and communication.The application has very important significance to promote the practical application of quantum conversation.

The application belongs to the technical field of quantum secure communication, and discloses a miniaturized quantum key distribution system and method, wherein a system transmitting module and a system receiving module transmit quantum signals through free space, and complete classical communication through a public channel; the system generates and updates shared keys based on a polarization encoding BB84 protocol; the transmitting module comprises an LED array, a driving circuit and a beam combining and collimating module; the receiving module comprises a focusing and beam splitting module, a single photon detection array module and a collecting and processing circuit; compared with the prior art, the application uses commercial off-the-shelf components, greatly reduces the hardware cost, solves the problem of high price of the existing system, can be integrated into a handheld device, meets the portable demand of consumer-level applications, realizes stable operation under shadow sunlight conditions through narrowband filtering, temperature control and dynamic gate width adjustment, expands the application scenarios, realizes continuous security protection through regular key "recharge", and promotes the civilianization of quantum encryption technology.

The invention discloses a laser radar data secure transmission method and system based on quantum key distribution, and belongs to the technical field of quantum communication and laser radar data security, and the method comprises the steps: building a quantum key distribution channel between a collection end and a processing center, generating a shared key through a BB84 protocol, and storing the shared key in a key pool; when the point cloud data is transmitted, a one-time key is extracted for encryption and then is transmitted through a classic channel; a key consumption and supplement dynamic balance mechanism is innovatively designed, the key pool allowance is monitored, and supplement is triggered when the key pool allowance is lower than a threshold value; the method is suitable for high-security scenes such as military surveying and mapping, key infrastructure monitoring and the like.

This invention discloses an encryption method that combines quantum keys and post-quantum cryptography algorithms, and belongs to the field of data encryption. This invention generates an original quantum key using a BB84 protocol QKD device, obtains a post-quantum key generation seed, lattice noise scaling coefficients, and a quantum-enhanced session-based key via hash derivation, generates a quantum-derived mask by combining the characteristics of the hydroelectric power terminal's operation data with the original quantum key, obtains quantum mask-protected data by performing an exclusive OR preprocessing on the data to be encrypted, generates two parts of basic ciphertext using the above seed, parameters, and protection data using a post-quantum encryption algorithm, further obtains a quantum-enhanced encrypted value by dividing the original quantum key, performs two disturbance encryptions and exclusive OR operations on each of the two parts of the ciphertext to form an enhanced ciphertext, and finally concatenates the enhanced ciphertext with a verification code before transmitting it to the central control room. This invention significantly improves the security and attack resistance of data transmission in scenarios such as hydroelectric power terminals through multi-stage encryption and key enhancement.