Cryptanalysis of the Cai-Cusick Lattice-based Public-key Cryptosystem

Yanbin Pan; Yingpu Deng

Paper 2008/204

Cryptanalysis of the Cai-Cusick Lattice-based Public-key Cryptosystem

Yanbin Pan and Yingpu Deng

Abstract

In 1998, Cai and Cusick proposed a lattice-based public-key cryptosystem based on the similar ideas of the Ajtai-Dwork cryptosystem, but with much less data expansion. However, they didn't give any security proof. In our paper, we present an efficient ciphertext-only attack which runs in polynomial time against the cryptosystem to recover the message, so the Cai-Cusick lattice-based public-key cryptosystem is not secure. We also present two chosen-ciphertext attacks to get a similar private key which acts as the real private key.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. Unknown where it was published
Contact author(s): panyanbin @ amss ac cn
History: 2008-05-13: received
Short URL: https://ia.cr/2008/204
License: CC BY

BibTeX

@misc{cryptoeprint:2008/204,
      author = {Yanbin Pan and Yingpu Deng},
      title = {Cryptanalysis of the Cai-Cusick Lattice-based Public-key Cryptosystem},
      howpublished = {Cryptology {ePrint} Archive, Paper 2008/204},
      year = {2008},
      url = {https://eprint.iacr.org/2008/204}
}