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Towards a general RC4-like keystream generator

Författare

Summary, in English

RC4 was designed in 1987 when 8-bit and 16-bit processors were commercially available. Today, most processors use 32-bit or 64-bit words but using original RC4 with 32/64 bits is infeasible due to the large memory constraints and the number of operations in the key scheduling algorithm. In this paper we propose a new 32/64-bit RC4-like keystream generator. The proposed generator produces 32 or 64 bits in each iteration and can be implemented in software with reasonable memory requirements. It has a huge internal state and offers higher resistance to state recovery attacks than the original 8-bit RC4. Further, on a 32-bit processor the generator is 3.1 times faster than original RC4. We also show that it can resist attacks that are successful on the original RC4. The generator is suitable for high speed software encryption.

Publiceringsår

2005

Språk

Engelska

Sidor

162-174

Publikation/Tidskrift/Serie

Information Security and Cryptology / Lecture notes in computer science

Volym

3822

Dokumenttyp

Konferensbidrag

Förlag

Springer

Ämne

  • Electrical Engineering, Electronic Engineering, Information Engineering

Nyckelord

  • stream ciphers
  • random shuffle
  • keystream generator
  • RC4

Conference name

Information Security and Cryptology First SKLOIS Conference, CISC 2005

Conference date

2005-12-15 - 2005-12-17

Conference place

Beijing, China

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1611-3349
  • ISSN: 0302-9743
  • ISBN: 978-3-540-30855-3