Cryptanalysis of NTRU with two public keys

Abderrahmane Nitaj

Paper 2011/477

Cryptanalysis of NTRU with two public keys

Abderrahmane Nitaj

Abstract

NTRU is a fast public key cryptosystem presented in 1996 by Hoffstein, Pipher and Silverman. It operates in the ring of truncated polynomials. In NTRU, a public key is a polynomial defined by the combination of two private polynomials. In this paper, we consider NTRU with two different public keys defined by different private keys. We present a lattice-based attack to recover the private keys assuming that the public keys share polynomials with a suitable number of common coefficients.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. Unknown where it was published
Keywords: NTRU cryptosystem Lattice attacks Cryptanalysis
Contact author(s): abderrahmane nitaj @ unicaen fr
History: 2011-09-06: received
Short URL: https://ia.cr/2011/477
License: CC BY

BibTeX

@misc{cryptoeprint:2011/477,
      author = {Abderrahmane Nitaj},
      title = {Cryptanalysis of {NTRU} with two public keys},
      howpublished = {Cryptology {ePrint} Archive, Paper 2011/477},
      year = {2011},
      url = {https://eprint.iacr.org/2011/477}
}