日時： 平成24年3月22日（火）15時30分-
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：Kwok-Wo WONG
講演者所属機関・部局・役職名： Department of Electronic Engineering
City University of Hong Kong
講演題目： Joint Source Coding and Encryption using
Chaos and Fractals
Source coding and encryption are the major operations required in the transmission of large
amount of confidential information via a public network. Traditionally, these operations are
performed independently. For example, the source sequence is first compressed using arithmetic
coding; then the compressed sequence is encrypted using Advanced Encryption Standard (AES).
In this seminar, two applications of nonlinear systems for joint source coding and encryption will
be presented. For the lossless reconstruction of general binary sequences, a simple piecewise
linear chaotic map is employed for simultaneous arithmetic coding and encryption. For lossy
image compression, the integration of selective encryption in fractal image coding will be
described.
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