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