日時： 平成22年5月27日（木）15時 30分 - 17時 00分
場所： 場 所 情報科学研究科 5階 コラボレーションルーム7
講演者氏名：Matt Henricksen
講演者所属機関・部局・役職名： Principal Investigator, Symmetric Cryptology, at Institute for Infocomm Research, Singapore
講演題目：「Unsolved problems in Stream Cipher research」
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.
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