Patent ID: 11924337
Assignee: SOLITON SYSTEMS K.K.
Field: Digital communication (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 14:
15. The sensitive data management apparatus according to claim 14, which generates the second symmetric encryption key by using predetermined information selected among a plurality of the predetermined information exchanged in advance with each of the plurality of the sensitive data access support terminals and encrypts the sensitive data protection code using the second symmetric encryption key corresponding to each of the plurality of the sensitive data access support terminals, further configured to:
transmit, to a sensitive data access support terminal with which first predetermined information has been exchanged, among the plurality of the predetermined information exchanged in advance with each of the plurality of the sensitive data access support terminals, the sensitive data protection code encrypted using a fourth symmetric encryption key generated by using the first predetermined information, when the operation to start decryption of the sensitive data is performed;
receive, from the sensitive data access support terminal with which the first predetermined information has been exchanged in advance, the decrypted sensitive data protection code that has been decrypted based on the sensitive data protection code encrypted using the fourth symmetric encryption key;
display the sensitive data protection code encrypted using a fifth symmetric encryption key generated by using second predefined information different from the first predetermined information, when the operation to start decryption of the sensitive data is performed and the transmission of the sensitive data protection code encrypted using the fourth symmetric encryption key fails; and
input the decrypted sensitive data protection code decrypted by the sensitive data access support terminal with which the second predetermined information has been exchanged in advance, based on the sensitive data protection code encrypted using the fifth symmetric encryption key and displayed.