公开(公告)号：US20150220456A1

公开(公告)日：2015-08-06

申请号：US14610924

申请日：2015-01-30

Applicant: STMicroelectronics SA

Inventor： Bruno Fel

IPC: G06F12/14 ,  G06F12/08

CPC classification number: G06F12/1408 ,  G06F12/0802 ,  G06F21/125 ,  G06F2212/1052 ,  G06F2212/603

Abstract: Program code intended to be copied into the cache memory of a microprocessor is transferred encrypted between the random-access memory and the processor, and the decryption is carried out at the level of the cache memory. A checksum may be inserted into the cache lines in order to allow integrity verification, and this checksum is then replaced with a specific instruction before delivery of an instruction word to the central unit of the microprocessor.

Abstract translation: 旨在复制到微处理器的高速缓冲存储器中的程序代码在随机存取存储器和处理器之间被加密传送，并且在高速缓冲存储器的级别执行解密。 可以将校验和插入到高速缓存行中以便允许完整性验证，然后在将指令字发送到微处理器的中央单元之前，该校验和被替换为特定指令。