Multi-Receiver Chaotic Key Generation Scheme Based on SM9
Aiming at the key management problem involved in secure communication during information transmission,combined with the chaotic secure communication model,a multi-receiver chaotic key generation scheme based on SM9 was proposed.This scheme extended the key encapsulation mechanism of the SM9 identification encryption algorithm to construct a multi-receiver key encapsulation mechanism.That is,the encapsulator selected a group of designated recipients,used their identity information to generate and encapsulate the key,and sent the ciphertext.Only the recipients in the user set can use the private key to decrypt the ciphertext to obtain the key.In order to ensure that the communication party can carry out chaotic secure communication,a data conversion method that converted binary numbers to floating points was proposed,and multiple floating point numbers could be generated according to the number of parameters.The sender and the receiver realized key synchronization through data conversion processing of the key,which caid the foundation for chaotic secure communication.This scheme realized that the key was generated from the identification information of multiple receivers,which ensured the security and confidentiality of the key.Under the random oracle model,it is proved that this scheme has good efficiency and performance,and satisfies the security of IND-sID-CCA.
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