An easily testable and reconfigurable pipeline for symmetric block ciphers

Authors:
Myeong-Hyeon Lee;Yoon-Hwa Choi
Affiliations:
Computer Engineering Department, Hongik University, Seoul, Korea;Computer Engineering Department, Hongik University, Seoul, Korea
Venue:
FDTC'06 Proceedings of the Third international conference on Fault Diagnosis and Tolerance in Cryptography
Year:
2006

Citing 4
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Abstract

In this paper, we present an easily-testable and reconfigurable pipeline for symmetric block ciphers. Bypass links with some extra pipeline stages are employed to detect errors, locate the corresponding faults, and reconfigure during normal operation. Duplicate computation, realized by using bypass links, is used to check the functionality of the modules for encryption. Test cycle insertion is controlled by activating bypass links either periodically or selectively, depending on the needs. Hardware overhead can be minimized by utilizing existing pipeline with one extra stage. Recovery from errors is achieved with negligible time overhead using the same bypass links employed for error detection.