公开(公告)号：US12225126B2

公开(公告)日：2025-02-11

申请号：US18076615

申请日：2022-12-07

Applicant: Silicon Motion, Inc.

Inventor： Wun-Jhe Wu ,  Po-Hung Chen ,  Chiao-Wen Cheng ,  Jiun-Hung Yu ,  Chih-Wei Liu

IPC: H04L9/06 ,  H04L9/08

Abstract: The invention introduces an apparatus for detecting errors during data encryption. The apparatus includes a key generation circuitry and a key-error detection circuitry. The key generation circuitry is arranged operably to realize a key expansion operation for generating multiple round keys based on a root key in an encryption algorithm, where the encryption algorithm encodes plaintext or an intermediate encryption result with one round key in a corresponding round. The error detection circuitry is arranged operably to: calculate redundant data corresponding to each round key; and output an error signal to a processing unit when finding that any round key does not match corresponding redundant data at a check point during the key expansion operation.