Advanced Communications and Multimedia Security: IFIP TC6 / by Chris J. Mitchell, Namhyun Hur (auth.), Borka Jerman-Blažič,

By Chris J. Mitchell, Namhyun Hur (auth.), Borka Jerman-Blažič, Tomaž Klobučar (eds.)

Advanced Communications and Multimedia Security offers a state of the art overview of present views in addition to the newest advancements within the zone of communications and multimedia protection. It examines specifications, concerns and ideas pertinent to securing info networks, and identifies destiny security-related examine demanding situations. a large spectrum of issues is mentioned, together with:
-Applied cryptography;
-Communication structures protection;
-Applications safeguard; cellular defense;
-Distributed structures protection;
-Digital watermarking and electronic signatures.

This quantity includes the court cases of the 6th Joint operating convention on Communications and Multimedia defense (CMS'02), which used to be subsidized by way of the foreign Federation for info Processing (IFIP) and held in September 2002 in Portoroz, Slovenia. It constitutes crucial interpreting for info protection experts, researchers and execs operating within the sector of machine technological know-how and conversation systems.

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Additional info for Advanced Communications and Multimedia Security: IFIP TC6 / TC11 Sixth Joint Working Conference on Communications and Multimedia Security September 26–27, 2002, Portorož, Slovenia

Sample text

Consider the length ( or the number of edges in) the path from each leaf to the root in a binary tree. The length of the longest such path is minimized when the tree is balanced. , when the tree is constructed such that all such paths differ in length by at most one. The length of the path from leaf to the root in a balanced binary tree containing t leaves is about log(t). Using a balanced binary tree as authentication tree, with t public values as leaves, authenticating a public value therein may be achieved by hashing log(t) values along the path to the root.

When the i-th bit of W~, (i = 1 to L) is 0, FIC gives KEYO, otherwise gives K EYl. M will send his sub-keys according the pseudo sequence for B. rr. Thus he can implement the reversely embedding of some bits while not knowing any information on B's codeword. 6. CONCLUSIONS In this paper we present a new idea for asymmetric fingerprinting based on secret sharing. We also describe an idea for the underlying fingerprinting scheme. When the digital data to be fingerprinted is large, A New Asymmetric Fingerprinting Framework Based on Secret Sharing 39 our framework is quite efficient.

The traditional way to realize asymmetric fingerprinting protocols is to use secure 2-party computations. The buyer and the merchant secretly enter their secret information and after the secure computation, the buyer gets the copy he wants, and the merchant gets his record on 32 Advanced Communications and Multimedia Security the purchase. We note that, though there may be some implementation of SMPC in this context, non of them is quite efficient. So we devise an asymmetric fingerprinting protocol without using SMPC.

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