Patent ID: 9407439
Filing Date: 2016-08-02
CPC Classification: H04L

Claim Text:
1. An authentication system, comprising: a to-be-authenticated device configured to generate first authentication data; an authentication code convertor configured to convert the first authentication data generated by the to-be-authenticated device into a second authentication data; and an authentication device configured to perform authentication of the to-be-authenticated device based on the second authentication data converted by the authentication code convertor, wherein the first authentication data includes a first authentication code and predetermined data included in the to-be-authenticated device, the to-be-authenticated device being configured to calculate the first authentication code using challenge data output from the authentication device in accordance with a common key encryption method using a common key, wherein the second authentication data includes a second authentication code and the predetermined data included in the to-be-authenticated device, the authentication code convertor being configured to connect the predetermined data and the challenge data as second connection data, encrypt the second connection data as a second authentication code in accordance with a public key using a private key, and output the second authentication data to the authentication device, and wherein the authentication device is configured to decrypt the second authentication code of the second authentication data using a public key, and to perform authentication of the to-be-authenticated device using a decrypted result.