Patent ID: 9736155
Date: 2017-08-15
CPC Classifications: H04L

Claim:
1. An authentication system comprising: a plurality of authentication apparatuses; and a management apparatus, wherein each of the plurality of authentication apparatuses includes: the management apparatus includes: the second processor updates, upon receiving, from one of the plurality of authentication apparatuses, a first identification information entry which is the identification information entry of an authentication target having undergone the authentication process of the first processor and a first execution information entry indicating that the authentication process has been executed, the execution information entry corresponding to the first identification information entry in the second memory, and stores a first sequence information entry indicating a current value of a sequence number in association with the first identification information entry in the second memory, the sequence number being a number of times of updating one of execution information entries stored in the second memory, wherein the second communication interface transmits the first sequence information entry and the first identification information entry to the authentication apparatus from which the first identification information entry and the first execution information entry have been received, and wherein the first communication interface acquires, upon receiving the first sequence information entry from the management apparatus, a second execution information entry and a second sequence information entry stored in the second memory in association with a second identification information entry from the management apparatus, and stores, in the first memory, the second execution information entry and the second sequence information entry in association with the second identification information entry, the second identification information entry being identified based on a result obtained by comparing the first sequence information entry against a different sequence information entry received by the first communication interface prior to the reception of the first sequence information entry.