Patent ID: 11895240
Assignee: NEC CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 10:
11. The access token system according to claim 3, wherein,
the one or more second processors are configured to execute the second instructions to generate the challenge based on the recipient-designated hash value,
the one or more third processors are configured to execute the third instructions to generate the response including a fourth hash value in which the inverse element is not embedded by using an element of the processed value, and
the one or more second processors are configured to execute the second instructions to:
determine whether the fourth hash value included in the response is equal to a third hash value obtained by performing hash operation on a third access token included in received access token data, and
verify, if the fourth hash value is equal to the third hash value, that the user is the designated recipient.