Strongly Secure Scan Design Using Generalized Feed Forward Shift Registers

Hideo FUJIWARA  Katsuya FUJIWARA  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E98-D   No.10   pp.1852-1855
Publication Date: 2015/10/01
Online ISSN: 1745-1361
Type of Manuscript: LETTER
Category: Dependable Computing
Keyword: 
design-for-testability,  scan design,  generalized feed-forward shift registers,  security,  scan-based side-channel attack,  

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Summary: 
In our previous work [12], [13], we introduced generalized feed-forward shift registers (GF2SR, for short) to apply them to secure and testable scan design, where we considered the security problem from the viewpoint of the complexity of identifying the structure of GF2SRs. Although the proposed scan design is secure in the sense that the structure of a GF2SR cannot be identified only from the primary input/output relation, it may not be secure if part of the contents of the circuit leak out. In this paper, we introduce a more secure concept called strong security such that no internal state of strongly secure circuits leaks out, and present how to design such strongly secure GF2SRs.