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Details of Grant 

EPSRC Reference: GR/H23719/01
Title: STREAM CIPHERS
Principal Investigator: Piper, Professor F
Other Investigators:
Wild, Professor P Mitchell, Professor CJ
Researcher Co-Investigators:
Project Partners:
Department: Mathematics
Organisation: Royal Holloway, Univ of London
Scheme: Standard Research (Pre-FEC)
Starts: 01 October 1992 Ends: 30 September 1995 Value (£): 73,005
EPSRC Research Topic Classifications:
Digital Signal Processing
EPSRC Industrial Sector Classifications:
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Summary on Grant Application Form
To perform an in-depth study of current stream cipher keystream generators and to investigate the possibility of using the complexity theoretic approach to designing practical generators with more suitable security levels.Progress:A thorough survey of keystream generators has been conducted, to include both theoretical as well as practical systems. This has led to the publication of 2 research papers which exhibit successful attacks on proposed ciphers.The feasibility of adapting current proposals for generators based on one-way functions has been investigated. The conclusion is that such ciphers are unsuitable for on-line usage. This conclusion led to the investigation of the design of practical on-line generators based on a pure mathematical approach. This work has resulted in three publications on various aspects of fast sequence generation.In addition to the above 5 publications, the Research Assistant (Dr Simon Blackburn) has submitted a further five research papers for publication, and co-authored two survey articles. He has visited ETH (Zurich) and the University of Bonn and has presented papers at two international conferences.Progress on this project has been excellent.
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