PEM: a lightweight program memory encryption mechanism 
for embedded processor

doi:10.1016/S1005-8885(09)60428-3

中国邮电高校学报(英文) ›› 2010, Vol. 17 ›› Issue (1): 77-84.doi: 10.1016/S1005-8885(09)60428-3

• Artificial Intelligence • 上一篇下一篇

PEM: a lightweight program memory encryption mechanism
for embedded processor

霍文捷,刘政林,邹雪城

Department of Electronics of Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China

收稿日期:2008-12-30 修回日期:1900-01-01 出版日期:2010-02-28
通讯作者: 刘政林

PEM: a lightweight program memory encryption mechanism
for embedded processor

HUO Wen-jie, LIU Zheng-lin, ZOU Xue-cheng

Department of Electronics of Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China

Received:2008-12-30 Revised:1900-01-01 Online:2010-02-28
Contact: LIU Zheng-lin

摘要/Abstract

摘要：

Application of embedded systems is faced with multiple threats against security. To solve this problem, this article proposes a new program memory encryption mechanism (PEM) to enhance the security of embedded processor. The new mechanism encrypts all the programs via a secure cache structure. It not only caches the instructions read from the off-chip memory, but also stores the pad values used to encrypt the plaintext. It effectively accelerates encryption and reduces the performance overhead. Besides the encryption, PEM also monitors the program modifications and reset behaviors to reduce the risk of vicious tamper. The experiment indicates that PEM has an average of 2.3 % performance improvement and results in a 25.71 % power reduction in the write-back stage. The new scheme offers a good balance between performance and security. It is fully practicable for embedded processor.

关键词:

;embedded;processor,;memory;encryption,;advanced;encryption;standard;(AES),;secure;cache,;hardware;protection;

Abstract:

Key words:

embedded processor;memory encryption;advanced encryption standard (AES);secure cache;hardware protection

HUO Wen-jie, LIU Zheng-lin, ZOU Xue-cheng. PEM: a lightweight program memory encryption mechanism
for embedded processor[J]. Acta Metallurgica Sinica(English letters), 2010, 17(1): 77-84.

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PEM: a lightweight program memory encryption mechanism
for embedded processor

PEM: a lightweight program memory encryption mechanism
for embedded processor

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PEM: a lightweight program memory encryption mechanism for embedded processor

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PEM: a lightweight program memory encryption mechanism
for embedded processor

PEM: a lightweight program memory encryption mechanism
for embedded processor