US 12,341,871 B2
Practical itemized encryption for cryptographic erasure (PIECE)
Jeffrey J. Stapleton, O'Fallon, MO (US)
Filed by Wells Fargo Bank, N.A., San Francisco, CA (US)
Filed on Jul. 19, 2023, as Appl. No. 18/223,956.
Prior Publication US 2025/0030538 A1, Jan. 23, 2025
Int. Cl. H04L 29/06 (2006.01); H04L 9/06 (2006.01); H04L 9/08 (2006.01)
CPC H04L 9/0637 (2013.01) [H04L 9/0869 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
identifying a plurality of ciphertext blocks stored in a memory device to erase;
in response to identifying the plurality of ciphertext blocks to erase, performing a cryptographic erasure of the plurality of ciphertext blocks, wherein the cryptographic erasure comprises:
encrypting each of the plurality of ciphertext blocks with a random key; and
destroying the random key in response to encrypting each of the plurality of ciphertext blocks.