Timing Attacks against the Syndrome Inversion in Code-based Cryptosystems

Falko Strenzke

Paper 2011/683

Timing Attacks against the Syndrome Inversion in Code-based Cryptosystems

Falko Strenzke

Abstract

In this work we present the first practical key-aimed timing attack against code-based cryptosystems. It arises from vulnerabilities that are present in the inversion of the error syndrome through the Extended Euclidean Algorithm that is part of the decryption operation of these schemes. Three types of timing vulnerabilities are combined to a successful attack. Each is used to gain information about the secret support, which is part of code-based decryption keys: The first allows recovery of the zero-element, the second is a refinement of a previously described vulnerability yielding linear equations, and the third enables to retrieve cubic equations.

Metadata

Available format(s): PDF
Category: Implementation
Publication info: Published elsewhere. Unknown where it was published
Keywords: ide channel attack timing attack post quantum crypto-graphy code-based cryptography
Contact author(s): fstrenzke @ crypto-source de
fstrenzke @ gmx de
History: 2012-08-07: revised; 2011-12-18: received; See all versions
Short URL: https://ia.cr/2011/683
License: CC BY

BibTeX

@misc{cryptoeprint:2011/683,
      author = {Falko Strenzke},
      title = {Timing Attacks against the Syndrome Inversion in Code-based Cryptosystems},
      howpublished = {Cryptology {ePrint} Archive, Paper 2011/683},
      year = {2011},
      url = {https://eprint.iacr.org/2011/683}
}