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Side Channel Considerations for AES Intermediate Rounds

Technical Report ·
DOI:https://doi.org/10.2172/1646972· OSTI ID:1646972
 [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

We illustrate a theoretical side-channel analysis on the intermediate rounds of AES, using only the Hamming weights of the bytes registered after the S-box operation. Input and output state values are unknown. Simulations and a blind test were used to show the feasibility of the analysis under ideal conditions. General applicability of the idea and possible extensions are discussed, as well as limiting assumptions. Some implementation approaches are described in Appendix A, in the case of constrained computing capabilities (desktop or laptop).

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
DOE Contract Number:
AC04-94AL85000
OSTI ID:
1646972
Report Number(s):
SAND--2020-7996R; 687840
Country of Publication:
United States
Language:
English

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