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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)
- 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