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

Claim 11:
12. A sensitive data management apparatus configured for communicating with a sensitive data access support terminal, the sensitive data management apparatus comprising memory storing instructions and one or more processors that, with the instructions, configure the sensitive data management apparatus to:
generate a sensitive data protection code having a predetermined data length;
encrypt sensitive data using the sensitive data protection code as a first symmetric encryption key;
generate a second symmetric encryption key by using predetermined information exchanged in advance with the sensitive data access support terminal;
encrypt the sensitive data protection code using the second symmetric encryption key;
delete the first symmetric encryption key and the sensitive data after the encryption of the sensitive data;
delete the sensitive data protection code after the encryption of the sensitive data protection code;
transmit, to the sensitive data access support terminal, the encrypted sensitive data protection code when an operation to start decryption of the sensitive data is performed;
receive, from the sensitive data access support terminal, a decrypted sensitive data protection code that has been decrypted based on the encrypted sensitive data protection code; and
decrypt the encrypted sensitive data using a third symmetric encryption key,
wherein the sensitive data protection code received from the sensitive data access support terminal is used as the third symmetric encryption key.