Quantum-key-distribution-network-based mobile encryption system and communication method thereof

Abstract

The invention discloses a quantum-key-distribution-network-based mobile encryption system and a communication method thereof. The method comprises that: a mobile terminal is registered in a network; the registered mobile terminal is connected with any quantum terminal by a key updating interface, and applies for the downloading of shared keys in a certain data volume to the quantum terminal; after the mobile terminal downloads the keys, the quantum terminal transmits a quantum centralized control station address to the mobile terminal for updating, and the mobile terminal takes a centralized control station on the quantum centralized control station address as a calling centralized control station; after the calling centralized control station is determined, the mobile terminal submits a cipher text to the calling centralized control station; the calling centralized control station re-encrypts the cipher text, and transmits the re-encrypted cipher text to a called centralized control station; the called centralized control station re-encrypts the cipher text, and transmits the re-encrypted cipher text to a called user; and after the called user decrypts the re-encrypted cipher text to obtain a plaintext, the communication is finished. In the method, the encryption does not require multiple matrix multiplication operations, so the computational load of the encryption is greatlyreduced; and simultaneously, the key distribution security of the highest level can be ensured in the key distribution of a quantum key distribution network.

Description

technical field [0001] The invention belongs to the field of encryption of mobile communication equipment, and in particular relates to a mobile encryption system based on a quantum key distribution network and a communication method thereof. Background technique [0002] At present, mobile communication encryption is encrypted using a symmetric encryption algorithm, and the encryption key is generated by some randomness algorithm through a preset key and a random number generated during the communication process. And during the communication process, use the current key to encrypt the new key, and send it to the other party of the communication to realize key distribution and update. Encryption security relies heavily on algorithms, and once an encryption process is broken, all future communications of the user will be broken. Cryptanalysis experts have claimed that the encrypted communication of the GSM communication standard can be easily cracked. The development of new...

AI Technical Summary

Problems solved by technology

Although the 3G standard mobile phone has high confidentiality performance, its security still has defects in theory. In particular, when the signal is weak, the 3G standard mobile phone compatible with GSM will automatically switch to the GSM standard

However, the single-photon quantum state communication has extremely weak energy and cannot be transmitted in the form of broadcast, which cannot meet the requirements of mobile communication.

Therefore, the current quantum key distribution technology can only be applied to optical fiber network communication

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