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SACRYPT
1998
Springer

A Lattice-Based Public-Key Cryptosystem

9 years 10 months ago
A Lattice-Based Public-Key Cryptosystem
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.
Jin-yi Cai, Thomas W. Cusick
Added 06 Aug 2010
Updated 06 Aug 2010
Type Conference
Year 1998
Where SACRYPT
Authors Jin-yi Cai, Thomas W. Cusick
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