Patent ID: 11968300
Assignee: NEC CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A data extraction system comprising:
a registration apparatus, comprising a processor; and
a memory in circuit communication with the processor, wherein
the processor is configured to execute program instruction stored in the memory to:, generate registration data including first information obtained by encrypting secret information, which is information that a user wishes to keep secret, by using a secret key and second information obtained by encrypting the secret key by using at least biological information of the user; and
a query apparatus, comprising a processor; and
a memory in circuit communication with the processor, wherein the processor is configured to execute program instruction stored in the memory to: acquire the registration data, extract the secret key from the registration data by using biological information of the user, and extract the secret information from the registration data by using the extracted secret key,
wherein the registration apparatus is configured to generate the second information by using, a hash value of a first identifier that identifies the secret information, a result of encoding the secret key, and the biological information of the user.