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
Creative Commons Attribution
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},
      note = {\url{https://eprint.iacr.org/2008/204}},
      url = {https://eprint.iacr.org/2008/204}
}
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