Improvement of linear equivalent circuit model to identify simultaneous switching noise current in cryptographic integrated circuits

Kengo Iokibe, Tetsuo Amano, Kaoru Okamoto, Yoshitaka Toyota, Tetsushi Watanabe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

The authors previously proposed a method based on a linear equivalent circuit model to predict vulnerability of cryptographic devices before fabrication. The method was verified to demonstrate the correlation power analysis attack, a major side-channel attack method, to a cryptographic device with outstanding accuracy. However, no obvious correlation was seen between the equivalent current source modeling the generation of the simultaneous switching noise (SSN) current in the circuit model and the encryption operation used in the previous study. Therefore, in this study, we improved the topology of the linear equivalent circuit model matched with the physical construction of the power distribution network (PDN) and re-identified the equivalent current source. By comparing the improved current source with the encryption operation, obvious correlations between them were found with respect to the period of the round operation and the dependency of the SSN current on the Hamming distance between successive intermediates. The improved equivalent current source was applied on a Field-Programmable Gate Array (FPGA) in which an Advance Encryption Standard (AES) circuit was implemented to simulate power traces that were confirmed to coincide with measured ones. Correlation between the simulated power traces and the power model was investigated using a set of 1000 plaintexts. As a result, the correlation coefficients agreed well with those for measured power traces. Improving the equivalent circuit model topology, thus, helped to identify the SSN current generated in the FPGA during the AES operation.

Original languageEnglish
Title of host publicationProceedings - 2013 IEEE International Symposium on Electromagnetic Compatibility, EMC 2013
Pages834-839
Number of pages6
DOIs
Publication statusPublished - Dec 1 2013
Event2013 IEEE International Symposium on Electromagnetic Compatibility, EMC 2013 - Denver, CO, United States
Duration: Aug 5 2013Aug 9 2013

Publication series

NameIEEE International Symposium on Electromagnetic Compatibility
ISSN (Print)1077-4076
ISSN (Electronic)2158-1118

Other

Other2013 IEEE International Symposium on Electromagnetic Compatibility, EMC 2013
CountryUnited States
CityDenver, CO
Period8/5/138/9/13

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Iokibe, K., Amano, T., Okamoto, K., Toyota, Y., & Watanabe, T. (2013). Improvement of linear equivalent circuit model to identify simultaneous switching noise current in cryptographic integrated circuits. In Proceedings - 2013 IEEE International Symposium on Electromagnetic Compatibility, EMC 2013 (pp. 834-839). [6670526] (IEEE International Symposium on Electromagnetic Compatibility). https://doi.org/10.1109/ISEMC.2013.6670526