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On-line error detection and BIST for the AES encryption algorithm with different S-box implementations

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4 Author(s)

In this paper we experimentally investigate the efficiency of concurrent checking for the AES encryption algorithm (Rijndael) by parity modification according to K. Wu et al. (2004). Also we propose a simple BIST method. For BIST the implementation of the AES algorithm itself is used as well as a pseudo-random test input generator and a compactor of the test results. Thereby we utilized the property of the AES algorithm that arbitrarily given plain texts are encrypted by the successive rounds into "pseudo-random" cipher texts which are the (test) inputs for the next round. The complete data path of the AES algorithm is simulated as a netlist of AND-, NAND-, OR-, NOR- and XOR-gates. All possible single stuck-at faults are injected and simulated. For a special implementation of the S-boxes all errors within the data path of the AES algorithm due to single stuck-at faults are immediately detected.

Published in:

On-Line Testing Symposium, 2005. IOLTS 2005. 11th IEEE International

Date of Conference:

6-8 July 2005