Patent ID: 11863664
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of performing key exchange for a security operation in a storage device to be accessed by a plurality of user identifications (IDs), the method comprising:
generating, by a trusted third party (TTP) in or coupled to the storage device, a first certificate based on a first user ID and a first public key;
generating, by the TTP, a second certificate based on a second user ID and a second public key;
while the storage device is accessed by the first user ID, performing a first verification on the second certificate based on a third certificate in or accessed by the TTP;
when the first verification is successfully completed, deriving a ciphering key based on a first private key and the second public key obtained by the first verification;
while the storage device is accessed by the second user ID, performing a second verification on the first certificate based on the third certificate; and
when the second verification is successfully completed, deriving the ciphering key based on a second private key and the first public key obtained by the second verification.