Date: 2010/5/27 (Tue) 15：30～17：00Place: Collaboration Room #7 (Information Science Building, 5th floor)
Name: Matt Henricksen
Principal Investigator, Symmetric Cryptology, at Institute for Infocomm Research, Singapore
Title: Unsolved problems in Stream Cipher research
Abstract:
The successful conclusion of ECRYPT eSTREAM in April 2008 resulted in
eight stream ciphers that looked secure and efficient in software &/
hardware. That might lead to the belief that there is little new
research to do in the stream cipher field. In this
talk, I look at three areas where more research is required: stream
cipher authentication, which generates authentication tags
at low cost simultaneous to encryption; secure and fast modes of
conversion from block ciphers to stream ciphers, as typified by the
flawed cipher LEX; and resilience to side-channel attacks, such as
defeating the Leander-Zenner-Hawkes cache-timing attack on any cipher
that uses an LFSR. In all aspects, I show the problems faced by
describing attacks on real ciphers.