Journal of Cryptology

, Volume 10, Issue 3, pp 151–161 | Cite as

A construction of a cipher from a single pseudorandom permutation

Article

Abstract

We suggest a scheme for a block cipher which uses only one randomly chosen permutation,F. The key, consisting of two blocks,K1 andK2, is used in the following way. The message block is XORed withK1 before applyingF, and the outcome is XORed withK2, to produce the cryptogram block. We show that the resulting cipher is secure (when the permutation is random or pseudorandom). This removes the need to store, or generate a multitude of permutations.

Key words

Pseudorandomness DES Block cypher 

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References

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Copyright information

© International Association for Cryptologic Research 1997

Authors and Affiliations

  1. 1.Computer Science Department, TechnionIsrael Institute of TechnologyHaifaIsrael
  2. 2.Computer Science DepartmentTel-Aviv UniversityTel AvivIsrael

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