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Cryptanalysis of the Stream cipher BEAN

In English

Författare

Summary, in English

BEAN is a recent stream cipher proposal that uses Feedback with Carry Shift Registers (FCSRs) and an output function. There is a sound motivation behind the use of FCSRs in BEAN as they provide several cryptographically interesting properties. In this paper, we show that the output function is not optimal. We give an efficient distinguisher and a key recovery attack that is slightly better than brute force, requiring no significant memory. We then show how this

attack can be made better with access to more keystream. Already with access to 6 KiB, the 80-bit key is recovered in time 2^73.

Publiceringsår

2011

Språk

Engelska

Sidor

21-28

Publikation/Tidskrift/Serie

[Host publication title missing]

Dokumenttyp

Konferensbidrag

Förlag

Association for Computing Machinery (ACM)

Ämne

  • Electrical Engineering, Electronic Engineering, Information Engineering

Nyckelord

  • Stream cipher
  • combiner
  • cryptanalysis
  • FCSR

Conference name

The 4th International Conference on Security of Information and Networks

Conference date

2011-11-14 - 2011-11-19

Conference place

Sydney, Australia

Status

Published

Projekt

  • EIT_HSWC:Coding Coding, modulation, security and their implementation

Forskningsgrupp

  • Crypto and Security

ISBN/ISSN/Övrigt

  • ISBN: 978-1-4503-1020-8