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ISCA
2006
IEEE

Improving Cost, Performance, and Security of Memory Encryption and Authentication

13 years 9 months ago
Improving Cost, Performance, and Security of Memory Encryption and Authentication
Protection from hardware attacks such as snoopers and mod chips has been receiving increasing attention in computer architecture. This paper presents a new combined memory encryption/authentication scheme. Our new split counters for counter-mode encryption simultaneously eliminate counter overflow problems and reduce per-block counter size, and we also dramatically improve authentication performance and security by using the Galois/Counter Mode of operation (GCM), which leverages counter-mode encryption to reduce authentication latency and overlap it with memory accesses. Our results indicate that the split-counter scheme has a negligible overhead even with a small (32KB) counter cache and using only eight counter bits per data block. The combined encryption/authentication scheme has an IPC overhead of 5% on average across SPEC CPU 2000 benchmarks, which is a significant improvement over the 20% overhead of existing encryption/authentication schemes.
Chenyu Yan, Daniel Englender, Milos Prvulovic, Bri
Added 12 Jun 2010
Updated 12 Jun 2010
Type Conference
Year 2006
Where ISCA
Authors Chenyu Yan, Daniel Englender, Milos Prvulovic, Brian Rogers, Yan Solihin
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