International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

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

Authors:
Yanbin Pan
Yingpu Deng
Download:
URL: http://eprint.iacr.org/2008/204
Search ePrint
Search Google
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.
BibTeX
@misc{eprint-2008-17881,
  title={Cryptanalysis of the Cai-Cusick Lattice-based Public-key Cryptosystem},
  booktitle={IACR Eprint archive},
  keywords={public-key cryptography /},
  url={http://eprint.iacr.org/2008/204},
  note={ panyanbin@amss.ac.cn 14008 received 9 May 2008},
  author={Yanbin Pan and Yingpu Deng},
  year=2008
}