Cryptanalysis of a key exchange scheme based on block matrices

Maria Isabel Gonzalez Vasco; Angel L.  Perez del Pozo; Pedro Taborda Duarte

Paper 2009/553

Cryptanalysis of a key exchange scheme based on block matrices

Maria Isabel Gonzalez Vasco, Angel L. Perez del Pozo, and Pedro Taborda Duarte

Abstract

In this paper we describe a cryptanalysis of a key exchange scheme recently proposed by Alvarez, Tortosa, Vicent and Zamora. The scheme is based on exponentiation of block matrices over a finite field of prime order. We present an efficient reduction of the problem of disclosing the shared key to the discrete logarithm problem (DLP) in an extension of the base field.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. Unknown where it was published
Keywords: key exchange scheme cryptanalysis finite field block matrix discrete logarithm problem
Contact author(s): angel perez @ urjc es
History: 2009-11-18: received
Short URL: https://ia.cr/2009/553
License: CC BY

BibTeX

@misc{cryptoeprint:2009/553,
      author = {Maria Isabel Gonzalez Vasco and Angel L.  Perez del Pozo and Pedro Taborda Duarte},
      title = {Cryptanalysis of a key exchange scheme based on block matrices},
      howpublished = {Cryptology {ePrint} Archive, Paper 2009/553},
      year = {2009},
      url = {https://eprint.iacr.org/2009/553}
}