A novel covert channel attack using memory encryption engine cache

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Microarchitectural covert channel attack is a threat when multiple tenants share hardware resources such as last-level cache. In this work, we propose a novel covert channel attack that exploits new microarchitecture that have been introduced to support memory encryption - in particular, the memory encryption engine (MEE) cache. The MEE cache is a shared resource but only utilized when accessing the integrity tree data and provides opportunity for a stealthy covert channel attack. However, there are challenges since MEE cache organization is not publicly known and the access behavior differs from a conventional cache. We demonstrate how the MEE cache can be exploited to establish a covert channel communication.
Publisher
Institute of Electrical and Electronics Engineers Inc.
Issue Date
2019-06-03
Language
English
Citation

56th Annual Design Automation Conference, DAC 2019

DOI
10.1145/3316781.3317750
URI
http://hdl.handle.net/10203/264257
Appears in Collection
EE-Conference Papers(학술회의논문)
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