Patent ID: 8959606
Filing Date: 2015-02-17
Classification: H04L

Abstract:
1. A key updating method comprising: Step 1, receiving and authenticating, by a back-end authentication system, a current dynamic password generated by a dynamic token, and Step 2, generating, by the back-end authentication system, a first updating key with the key updating information and a first initial key stored in the back-end authentication system, copying, by the back-end authentication system, the first updating key to a buffer of the first initial key to update the first initial key with the first updating key in the case where the back-end authentication system fails to authenticate a dynamic password with the first initial key and succeeds in authenticating the dynamic password with the first updating key; obtaining and authenticating, by the dynamic token, the key updating information, generating, by the dynamic token, a second updating key according to the key updating information and a second initial key stored in the dynamic token and copying the second updating key to a buffer of the second initial key to update the second initial key with the second updating key in the case where the authentication succeeds; or quitting, by the dynamic token, the key updating in the case where the authentication fails to update the second initial key with the second updating key, wherein the key updating information comprises a first key updating password and an updating factor.