US 12,073,095 B2
Storage device performing a data protection operation and operation method thereof
In-Su Kim, Yongin-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Oct. 5, 2022, as Appl. No. 17/938,291.
Claims priority of application No. 10-2021-0157135 (KR), filed on Nov. 16, 2021; and application No. 10-2022-0043054 (KR), filed on Apr. 6, 2022.
Prior Publication US 2023/0152987 A1, May 18, 2023
Int. Cl. G06F 3/06 (2006.01)
CPC G06F 3/0622 (2013.01) [G06F 3/0659 (2013.01); G06F 3/0679 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An operation method of a storage device, which includes a nonvolatile memory device and is configured to communicate with a host based on a cryptographic key, the method comprising:
setting up a first key identifier and a first lifetime for a first cryptographic key, based on a first command received from the host; and
after the first lifetime expires, when a second command including the first key identifier is received from the host, performing a data protect operation regarding to the first cryptographic key,
wherein performing the data protect operation comprises returning a dummy response to the host in response to the second command,
wherein, when the second command is a read command, the dummy response returned to the host comprises randomly generated garbage data that is independent of data stored at a physical address of the storage device which corresponds to the read command.