Patent ID: 9667413
Date: 2017-05-30
CPC Classifications: H04L,H04W

Claim:
1. An encryption realization method, wherein, comprising: a push-to-talk (PTT) server and a group call terminal maintaining the same list of PTT authentication key K values respectively; during each group call, the PPT server 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; a serving radio network controller (SRNC) or an evolved NodeB (eNB) transmitting the RAND, the SQN and the authentication vector generated by the PTT server to the group call terminal; and the group call terminal, according to the RAND and an authentication token (AUTN) in the AV acquired from the PPT server, executing authentication to generate a cipher key (CK).