Encryption Realization Method and System

摘要

An encryption realization method and system are disclosed. The method includes: a network-side device and a group call terminal maintaining the same list of push-to-talk (PTT) authentication key K values respectively; during each group call, the network-side device calculating an authentication vector (AV) according to a generated random number (RAND), an authentication sequence number (SQN), a PTT authentication key K value selected from the list of PTT authentication key K values and public network authentication functions; and according to the RAND and an authentication token (AUTN) in the AV acquired from the network-side device, the group call terminal performing authentication to generate an cipher key (CK). With the method and system according to the embodiments of the present invention, the encryption of the PTT system based on the security mechanism of the public network can be achieved, and drawbacks in the related that that the encryption of the PTT system depends on the private encryption algorithm which has a low intensity, the key is transmitted via an air interface, and the replacement of the key is not in time are solved, thereby largely improving the security of the PTT system.

主权项

1. An encryption realization method, comprising:
a network-side device and a group call terminal maintaining the same list of push-to-talk (PTT) authentication key K values respectively; during each group call, the network-side device calculating an authentication vector (AV) using public network authentication functions with input parameters of a generated random number (RAND), an authentication sequence number(SQN), and a PTT authentication key K value selected from the list of PTT authentication key K values; and the group call terminal, according to the RAND and an authentication token (AUTN) in the AV acquired from the network-side device, executing authentication to generate a cipher key (CK).