A Sort of N-Party Authenticated Key Agreement Protocol Based on Password
Guiran Chang · Acta Armamentarii · 2008
Taking aim at the growing need of group communication,a password authenticated group key agreement protocol(PAGKA) based on password was put forward.The PAGKA flow is as follows.Based on different password and with a trusted server help,PAGKA can withstand off-line dictionary attack and validate each other.Under the condition that the server can't get the session key during all the protocol process it transfers the related information to clients.According to the information transferred by the server,all clients can compute the session key individually by the owned secret.PAGKA can achieve random group members' addition or delete based on forward security and backward security.The comparison of the security and the performance among GDH,N-party-PAKE and PAGKA shows that PAGKA has distinct superiority.