MATEC Web Conf.
Volume 355, 20222021 International Conference on Physics, Computing and Mathematical (ICPCM2021)
|Number of page(s)||8|
|Section||Computing Methods and Computer Application|
|Published online||12 January 2022|
A novel cache based on dynamic mapping against speculative execution attacks
1 Key Laboratory of Agricultural Informatization Standardization, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing 100083, P. R. China
2 College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, P. R. China
3 Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, P. R. China
4 Center of Mater. Sci. and Optoelec. Engineer. & School of Microelec., Univ. of Chinese Academy of Sciences, Beijing 100049, P. R. China
* Corresponding author: firstname.lastname@example.org
The Spectre attacks exploit the speculative execution vulnerabilities to exfiltrate private information by building a leakage channel. Creation of a leakage channel is the basic element for spectre attacks, among which the cache-tag side channel is considered to be the most serious one. To block the leakage channels, a novel cache applies Dynamic Mapping technology, named DmCache, is presented in this paper. DmCache applies a dynamic mapping mechanism to temporarily store all the cache lines polluted by speculative execution and keep invisible when accessing. Then it monitors the head of the reorder buffer to determine which polluted cache line can become visible. In this paper, we demonstrated that Spectre attacks exerted no impact on a processor system equipped with DmCache based on the analysis of the processor’s circuit behaviour, which equipped with the DmCache and under the Spectre attack.
Key words: Microprocessors / Microcomputers / Spectre attacks
© The Authors, published by EDP Sciences, 2022
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