Device, Storage Device and Method for Switching Encryption Algorithm

A storage device comprising:

• a non-volatile memory configured to store a first signature that is based on a first cryptographic algorithm, a second signature that is based on a second cryptographic algorithm, and firmware;
• and
• a storage controller configured to
• verify the first signature based on a first public key for decrypting the first signature and a hash value associated with the firmware, and
• update, in response to successful verification of the first signature, a second public key that is included in the firmware into the storage device.

A method of operating a device, the method comprising:

• receiving, from a host, a first signature generated based on a first cryptographic algorithm, a second signature generated based on a second cryptographic algorithm, and firmware;
• verifying the first signature based on a first public key for decrypting the first signature and a hash value associated with the firmware;
• and
• writing, in response to successful verification of the first signature, a second public key that is included in the firmware into a memory.