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

Claim 0:
1. An access token system comprising:
a generator that comprises,
one or more first memories configured to store first instructions, and
one or more first processors configured to execute the first instructions to:
generate a first hash value based on a first access token;
calculate an inverse element of a processed value, wherein the processed value is obtained by processing a random number and a secret information of a recipient using a processing function;
generate a recipient-designated access token which includes a recipient-designated hash value, wherein the recipient-designated access token is generated by embedding the calculated inverse element of the processed value into the generated first hash value; and
provide the recipient-designated access token to a user; and

a verifier that comprises,
one or more second memories configured to store second instructions, and
one or more second processors configured to execute the second instructions to:
receive, from the user of an input device, an input indicating the recipient-designated access token; and
authenticate the recipient-designated hash value included in the recipient-designated access token; and
in response to authenticating the recipient-designated hash value included in the recipient-designated access token, verify that the user who makes the input indicating the recipient-designated access token is a designated recipient to access a target resource.