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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