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MaTRU: A New NTRU-Based Cryptosystem

  • Michael Coglianese
  • Bok-Min Goi
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3797)

Abstract

In this paper, we propose a new variant of the NTRU public key cryptosystem – the MaTRU cryptosystem. MaTRU works under the same general principles as the NTRU cryptosystem, except that it operates in a different ring with a different linear transformation for encryption and decryption. In particular, it operates in the ring of k by k matrices of polynomials in R = ℤ[X]/(X n − 1), whereas NTRU operates in the ring ℤ[X]/(X n − 1). Note that an instance of MaTRU has the same number of bits per message as an instance of NTRU when nk 2 = N. The improved efficiency of the linear transformation in MaTRU leads to respectable speed improvements by a factor of O(k) over NTRU at the cost of a somewhat larger public key.

Keywords

Public key cryptosystems NTRU lattice based cryptography lattice attacks partial polynomial evaluation 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Michael Coglianese
    • 1
  • Bok-Min Goi
    • 2
  1. 1.MacgregorBostonUSA
  2. 2.Centre for Cryptography and Information Security (CCIS), Faculty of EngineeringMultimedia UniversityCyberjayaMalaysia

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