Wireless audio security method for dynamic key distribution based on password conversion

Abstract

The invention relates to the technical field of wireless communication, and discloses a wireless audio security method for dynamic key distribution based on password conversion, which comprises the following steps of: establishing an initial security communication link between two communication parties, and initializing the link through a key exchange protocol based on a public key encryption algorithm; a dynamic key is generated by adopting a distributed key generation protocol, the key is generated by two communication parties according to a preset key updating algorithm, and self-adaptive updating is carried out after each time of audio transmission. By adopting a distributed key generation protocol and a short-term encryption channel, the key distribution process is safer, and the risk of key leakage is reduced. Meanwhile, the encryption strength of the audio data is enhanced through a multiple encryption algorithm, security threats such as man-in-the-middle attack and replay attack are effectively prevented, and compared with a traditional method, the calculation burden during audio transmission each time is greatly reduced through the dynamic key updating and multiple encryption method, and excessive delay in the key updating process is avoided.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and particularly to a wireless audio security method based on dynamic key distribution through password conversion. Background Art

[0002] The wireless audio security method based on dynamic key distribution through password conversion is a method for protecting the security of wireless audio transmission through cryptographic technologies. This method utilizes a dynamic key distribution mechanism to ensure that even if the encryption key used by both communication parties is intercepted or cracked during transmission, attackers cannot obtain valid decryption information for a long time by regularly updating and converting the encryption key. The password conversion technology can generate a new key during each audio data transmission and distribute the key to both communication parties in a secure manner, thereby improving the confidentiality and integrity during data transmission, preventing security threats such as man-in-the-middle attacks and replay attacks, and ensuring the security of wireless audio communication.

[0003] In the existing wireless audio security method based on dynamic key distribution through password conversion, the following main drawbacks exist: Complexity of key management: Dynamic key distribution requires frequent key updates, which requires a very complex process for key generation, storage, and distribution. Especially in large-scale wireless networks, key management and synchronization may lead to performance bottlenecks, increasing the computational and communication overhead of the system; Security issues in key distribution: Although the key is distributed through an encryption method, in some cases, the key distribution process may be exposed to attackers, especially when the key transmission link is not completely secure. This may allow attackers to intercept the key distribution process and obtain the communication key, thereby cracking the audio data; Computational and transmission burden: Frequent password conversion and key updates may require high computational resources. Especially in real-time audio transmission, computational latency may affect the quality and transmission efficiency of the audio, and even cause latency problems; Limited anti-attack ability: Although password conversion can improve security, in the face of some advanced attacks (such as side-channel attacks, brute-force cracking, etc.), the existing encryption technologies may not be powerful enough. Attackers may obtain the key or crack the audio data through analysis of the encryption process; Key synchronization problem: In some dynamic wireless networks, especially in mobile environments, key synchronization may have problems. If the keys of the two communication parties are not synchronized or there is a lag, it may lead to incorrect decryption of audio data, thereby affecting the stability and security of communication; Trade-off between security and performance: To ensure a high level of security, frequent key updates and complex encryption algorithms may increase the system load, thereby affecting the real-time performance of communication, especially in cases where the bandwidth is limited or the network latency is high.

[0004] Therefore, we propose a wireless audio security method based on dynamic key distribution through password conversion. Summary of the Invention

[0005] To achieve the above object, the present invention provides the following technical solution: A wireless audio security method for dynamic key distribution based on password conversion, comprising the following steps:

[0006] S1: Establish an initial secure communication link between the two communication parties, and the link is initialized through a key exchange protocol based on a public key encryption algorithm;

[0007] S2: Generate a dynamic key using a distributed key generation protocol. The key is generated by the two communication parties according to a preset key update algorithm and is adaptively updated after each audio transmission;

[0008] S3: Transmit the key through a short-term encryption channel. The encryption channel uses a symmetric encryption algorithm to encrypt the key to prevent the key from being stolen during the distribution process;

[0009] S4: During the audio transmission process, use a multiple encryption algorithm to encrypt the audio data. The encryption includes segment encryption, stream encryption, and random key encryption of the audio data to ensure the confidentiality, integrity, and anti-attack ability of the audio data;

[0010] S5: Combine a fast key synchronization mechanism and use a synchronization signal to maintain the consistency of the keys of the two communication parties to prevent audio decryption failure caused by key out-of-sync.

[0011] Preferably, the distributed key generation protocol uses a key exchange algorithm based on RSA or ECC (elliptic curve cryptography) to ensure that the key generation process of the two communication parties cannot be stolen by external attackers.

[0012] Preferably, the dynamic key dynamically adjusts the update frequency according to the network bandwidth, latency, and current communication load after each audio data transmission, and the update frequency is determined by the real-time feedback network status.

[0013] Preferably, the multiple encryption algorithm includes segment encryption of the audio data, and combines stream encryption and random key encryption based on a time stamp. The random key is generated and synchronously updated by both parties after each audio transmission.

[0014] Preferably, the fast key synchronization mechanism transmits synchronization messages through a wireless control channel. The messages use a time stamp and a dynamic key hash algorithm to ensure real-time synchronization of the keys and prevent replay attacks.

[0015] Preferably, the short-term encryption channel uses the AES symmetric encryption algorithm to encrypt and transmit the key, and the life cycle of the key during the transmission process does not exceed the audio data transmission cycle.

[0016] Preferably, the encryption process of the audio data is carried out through a real-time encryption and decryption mechanism for audio frames, ensuring a high degree of synchronization between audio playback and the encryption and decryption processes without causing transmission delays.

[0017] Preferably, the key distribution and audio data encryption processes are jointly implemented by software or hardware devices, and a hardware acceleration module is used to improve the efficiency of the encryption and decryption processes and reduce the system burden.

[0018] Compared with the prior art, the present invention provides a wireless audio security method based on dynamic key distribution through password conversion, having the following beneficial effects:

[0019] 1. For the wireless audio security method based on dynamic key distribution through password conversion, by adopting a distributed key generation protocol and a short-term encryption channel, the key distribution process is more secure, reducing the risk of key leakage. At the same time, multiple encryption algorithms enhance the encryption intensity of audio data, effectively preventing security threats such as man-in-the-middle attacks and replay attacks.

[0020] 2. For the wireless audio security method based on dynamic key distribution through password conversion, through dynamic key update and multiple encryption methods, the computational burden during each audio transmission is significantly reduced compared with traditional methods, avoiding excessive delays during the key update process. It is suitable for low-latency and real-time audio communication environments. By adaptively adjusting the key update frequency and dynamically adjusting the key update interval according to the network state and transmission delay, the adaptability and performance of the system are improved, and resource waste caused by frequent updates is avoided.

[0021] 3. For the wireless audio security method based on dynamic key distribution through password conversion, through a fast key synchronization mechanism, the present invention ensures that the communication parties maintain key synchronization during audio transmission, avoiding communication interruptions or data loss caused by key desynchronization. By adopting a key exchange protocol based on public key encryption technology, the key distribution process is simplified, effectively reducing the complexity of key management, especially suitable for dynamic environments and large-scale networks. Detailed implementation manners

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment

[0024] An embodiment of a wireless audio security method based on dynamic key distribution through password conversion

[0025] A wireless audio security method based on password conversion for dynamic key distribution, comprising the following steps:

[0026] S1: Establish an initial secure communication link between the two communication parties, and the link is initialized through a key exchange protocol based on a public key encryption algorithm;

[0027] S2: Generate a dynamic key using a distributed key generation protocol. The key is generated by the two communication parties according to a preset key update algorithm and is adaptively updated after each audio transmission;

[0028] S3: Transmit the key through a short-term encryption channel. The encryption channel uses a symmetric encryption algorithm to encrypt the key to prevent the key from being stolen during the distribution process;

[0029] S4: During the audio transmission process, use a multiple encryption algorithm to encrypt the audio data. The encryption includes segmented encryption, stream encryption, and random key encryption of the audio data to ensure the confidentiality, integrity, and anti-attack ability of the audio data;

[0030] S5: Combine a fast key synchronization mechanism and use a synchronization signal to maintain the consistency of the keys of the two communication parties to prevent audio decryption failure caused by key desynchronization.

[0031] Specifically, the distributed key generation protocol uses a key exchange algorithm based on RSA or ECC (Elliptic Curve Cryptography) to ensure that the key generation process of the two communication parties cannot be stolen by external attackers.

[0032] Specifically, the dynamic key dynamically adjusts the update frequency according to the network bandwidth, latency, and current communication load after each audio data transmission, and the update frequency is determined by the real-time feedback network status.

[0033] Specifically, the multiple encryption algorithm includes segmenting the audio data for encryption, and combining stream encryption with random key encryption based on a time stamp. The random key is generated and synchronously updated by both parties after each audio transmission.

[0034] Specifically, the fast key synchronization mechanism transmits synchronization messages through a wireless control channel. The messages use a time stamp and a dynamic key hash algorithm to ensure real-time synchronization of the keys and prevent replay attacks.

[0035] Specifically, the short-term encryption channel uses the AES symmetric encryption algorithm to encrypt and transmit the key, and the life cycle of the key during the transmission process does not exceed the audio data transmission cycle.

[0036] Specifically, the encryption process of the audio data is carried out through a real-time encryption and decryption mechanism of audio frames to ensure a high degree of synchronization between audio playback and encryption and decryption processes without causing transmission delay.

[0037] Specifically, the key distribution and audio data encryption processes are jointly implemented by software or hardware devices, and a hardware acceleration module is used to improve the efficiency of the encryption and decryption processes and reduce the system burden.

[0038] Through the above technical solution, in the present invention, by adopting a distributed key generation protocol and a short-term encryption channel, the key distribution process is more secure, reducing the risk of key leakage. At the same time, multiple encryption algorithms enhance the encryption intensity of audio data, effectively preventing security threats such as man-in-the-middle attacks and replay attacks. Compared with traditional methods, the dynamic key update and multiple encryption methods significantly reduce the computational burden during each audio transmission, avoiding excessive delays during the key update process, and are applicable to low-latency and real-time audio communication environments. By adaptively adjusting the key update frequency and dynamically adjusting the key update interval according to the network status and transmission delay, the adaptability and performance of the system are improved, and resource waste caused by frequent updates is avoided. Through a fast key synchronization mechanism, the present invention ensures that the communication parties maintain key synchronization during the audio transmission process, avoiding communication interruptions or data loss caused by key desynchronization. The key exchange protocol based on public key encryption technology simplifies the key distribution process and effectively reduces the complexity of key management, especially applicable to dynamic environments and large-scale networks.

[0039] The specific implementation of the present invention can be achieved through the following steps and system configurations:

[0040] Step 1: Initial key establishment

[0041] Before the communication parties start audio transmission, a secure initial communication link is established using a public key encryption protocol (such as RSA, ECC). Each of the communication parties generates a pair of public and private keys, and encrypts its own private key using the other party's public key as the initial key, and exchanges it through a secure channel. This step ensures a secure communication channel between the two parties.

[0042] Step 2: Dynamic key generation and update

[0043] Through a distributed key generation protocol (such as the Diffie-Hellman protocol), the two parties will update the key using an adaptive algorithm based on the current network status after each audio transmission. The algorithm determines the update frequency and the length of the key according to the real-time feedback network conditions (such as bandwidth, delay, network load, etc.). Whenever the network conditions change, the key will dynamically adjust the update frequency, ensuring the efficiency and security of key updates.

[0044] Step 3: Key distribution and encryption

[0045] During the transmission of the key, a short-term encryption channel is used to encrypt the key. The common encryption method is AES (symmetric encryption algorithm). The lifecycle of key distribution is usually short, and the key is only valid within one audio data transmission cycle. Through the AES encryption algorithm, it is ensured that the key is not maliciously stolen during the transmission process. To further enhance security, a timestamp and a random number can also be added during key distribution to prevent replay attacks.

[0046] Step 4: Multiple Encryption of Audio Data

[0047] The audio data is encrypted using a multiple encryption algorithm during the transmission process. First, the audio data is segmented into multiple data segments, and each data segment is encrypted using a stream encryption algorithm to ensure the confidentiality of the data stream. Second, each data segment is encrypted using a random key based on the timestamp, and each encrypted segment uses a new random key, thus avoiding the risk of encryption key leakage. The key for each audio segment is automatically updated after the audio transmission is completed.

[0048] Step 5: Fast Key Synchronization

[0049] To ensure that both communication parties always use synchronized keys, the system designs a fast key synchronization mechanism. The two parties regularly exchange synchronization signals through a control channel (such as a wireless control channel), and verify the synchronization signals through a timestamp and a hash algorithm to ensure that the transmitted keys are valid and consistent. This synchronization mechanism can prevent decryption failures or audio data loss caused by key desynchronization.

[0050] Step 6: Synchronization of Audio Data Encryption and Decryption

[0051] To avoid the encryption and decryption processes affecting the real-time performance of audio playback, the encryption and decryption processes of audio data are highly synchronized. The encryption operation and decryption operation of each frame of audio data are performed simultaneously during audio playback, ensuring no delay during the audio transmission process, and guaranteeing the integrity and confidentiality of the data. The encryption module performs encryption operations according to the frame structure of the audio to ensure the real-time performance of the audio data stream.

[0052] Step 7: Hardware Acceleration

[0053] To improve the efficiency of encryption and decryption, a hardware acceleration module can be used to execute the encryption algorithm. Especially during the multiple encryption and key update processes, hardware acceleration can significantly reduce the computational burden and delay, thus ensuring the fast and secure transmission of wireless audio data.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wireless audio security method based on password conversion for dynamic key distribution, characterized in that: It includes the following steps: S1: Establish an initial secure communication link between the two communication parties, and the link is initialized through a key exchange protocol based on a public key encryption algorithm; S2: Generate a dynamic key using a distributed key generation protocol. The key is generated by the two communication parties according to a preset key update algorithm and is adaptively updated after each audio transmission; S3: Transmit the key through a short-term encryption channel. The encryption channel uses a symmetric encryption algorithm to encrypt the key to prevent the key from being stolen during the distribution process; S4: During the audio transmission process, use a multiple encryption algorithm to encrypt the audio data. The encryption includes segment encryption, stream encryption, and random key encryption of the audio data to ensure the confidentiality, integrity, and anti-attack ability of the audio data; S5: Combine a fast key synchronization mechanism and use a synchronization signal to maintain the consistency of the keys of the two communication parties to prevent audio decryption failure caused by key desynchronization.

2. The wireless audio security method for dynamic key distribution based on password conversion according to claim 1, characterized in that: The distributed key generation protocol uses a key exchange algorithm based on RSA or ECC (elliptic curve cryptography) to ensure that the key generation process of the two communication parties is not stolen by external attackers.

3. A wireless audio security method for dynamic key distribution based on password conversion according to claim 1, characterized in that: The dynamic key dynamically adjusts the update frequency according to the network bandwidth, latency, and current communication load after each audio data transmission, and the update frequency is determined by the real-time feedback network status.

4. A wireless audio security method for dynamic key distribution based on password conversion according to claim 1, characterized in that: The multiple encryption algorithm includes segment encryption of the audio data, and combines stream encryption with random key encryption based on a timestamp. The random key is generated and synchronously updated by both parties after each audio transmission.

5. A wireless audio security method based on password conversion for dynamic key distribution according to claim 1, characterized in that: The fast key synchronization mechanism transmits synchronization messages through a wireless control channel. The messages use a timestamp and a dynamic key hash algorithm to ensure real-time key synchronization and prevent replay attacks.

6. The wireless audio security method for dynamic key distribution based on password conversion according to claim 1, characterized in that: The short-term encryption channel uses the AES symmetric encryption algorithm to encrypt and transmit the key, and the lifecycle of the key during the transmission process does not exceed the audio data transmission cycle.

7. A wireless audio security method based on password conversion for dynamic key distribution according to claim 1, characterized in that: The encryption process of the audio data ensures a high degree of synchronization between the audio playback and the encryption and decryption processes through a real-time encryption and decryption mechanism of audio frames without generating transmission delays.

8. A wireless audio security method for dynamic key distribution based on password conversion according to claim 1, characterized in that: The key distribution and audio data encryption processes are jointly implemented by software or hardware devices, and a hardware acceleration module is used to improve the efficiency of the encryption and decryption processes and reduce the system burden.