US 12,260,108 B2
Method for discarding personal information in nand flash memory
Dong Hoon Lee, Seoul (KR); and Na Young Ahn, Seoul (KR)
Assigned to Korea University Research and Business Foundation, Seoul (KR)
Filed by KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION, Seoul (KR)
Filed on Jan. 11, 2024, as Appl. No. 18/410,095.
Application 18/410,095 is a continuation of application No. 17/783,792, granted, now 11,899,958, previously published as PCT/KR2020/017965, filed on Dec. 9, 2020.
Claims priority of application No. 10-2019-0162829 (KR), filed on Dec. 9, 2019; and application No. 10-2020-0170824 (KR), filed on Dec. 8, 2020.
Prior Publication US 2024/0143217 A1, May 2, 2024
Int. Cl. G06F 12/00 (2006.01); G06F 3/06 (2006.01)
CPC G06F 3/0652 (2013.01) [G06F 3/0604 (2013.01); G06F 3/0679 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A storage device comprising:
at least one non-volatile memory device; and
a controller configured to control the at least one non-volatile memory device,
wherein the controller is configured to:
receives a secure deletion request from an external device,
receives original read data corresponding to the secure deletion request from the at least one non-volatile memory device,
modulates the original read data, and
outputs an overwrite command with the modulated data to the at least one nonvolatile memory device,
wherein the at least one non-volatile memory device performs an overwrite operation in response to the overwrite command, and
wherein the overwrite operation includes a program operation in at least one programmable state from a previously programmed state.