Read e-book online Advances in Information and Computer Security: Second PDF

By Satoshi Hada, Kouichi Sakurai (auth.), Atsuko Miyaji, Hiroaki Kikuchi, Kai Rannenberg (eds.)

ISBN-10: 3540756507

ISBN-13: 9783540756507

The overseas Workshop on safeguard (IWSEC 2007) was once the second one within the annualseriesthat startedin 2006.IWSEC 2007washeld on the New Public corridor in Nara, Japan, in the course of October 29–31, 2007. This 12 months there have been 112 paper submissions, and from those 30 papers have been authorised. authorized papers got here from 27 di?erent international locations, with the most important share coming from Japan (12). Estonia, China, Korea, Spain, Taiwan and america contributed 2 papers each one and Canada, Germany, Greece, Poland, Turkeyand Vietnam contributed 1 paper each one. we'd liketo thank all the authors who submitted papers to IWSEC 2007. The contributed papers have been supplemented by way of one invited speak from the - inent researcher Prof. Doug Tygar (UC Berkeley) in details defense. We have been lucky to have an brisk workforce of specialists who shaped this system Committee. Their names will be chanced on overleaf, and we're basically thankful for all their nice e?orts. This staff was once supported through a fair greater variety of people who reviewedpapers of their particularareasof services. an inventory of those names is additionally supplied; we are hoping it's complete.

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Read Online or Download Advances in Information and Computer Security: Second International Workshop on Security, IWSEC 2007, Nara, Japan, October 29-31, 2007. Proceedings PDF

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Extra info for Advances in Information and Computer Security: Second International Workshop on Security, IWSEC 2007, Nara, Japan, October 29-31, 2007. Proceedings

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5 Consideration In the proposed scheme, 2 DCT coefficients are used for the embedding of fingerprint information which is a pair (i0 , i1 ). In order to realize the hierarchical structure, each coefficients are assigned for one of (i0 , i1 ) without overlapping. Here, if each of them is multiplexed and embedded into 2 coefficients based on CDMA technique, the hierarchical structure can also be realized. In such a case, the allowable number of users is 4 2 , but the false positive detection rate will be doubled because the number of each elements are 2 and the rate is proportionally increased by the number.

However, the time required cannot easily be reduced. Therefore, an enormous number of the same kind of actual nodes must be prepared on the large-scale testbed. The proposed method will use a node swapping technique. In this technique, the same executing environments would be previously installed on many actual nodes. Then an actual node can be swapped to other nodes installed in the same executing environment when the executing environment sustains damage. After swapping, the damaged executing environment can be rebuilt in the background.

To apply statistical decision theory, we assume that d is composed of random variables and the sequence except watermarked component d(k), which is denoted by d , are distributed according to N (0, σ 2 ). If we insert a watermark to add α to d(k) in order to satisfy d(k) > maxi {d(i)}(i = k), then we can detect the embedded watermark by setting a threshold T to be imposed d(k) > T > d(i). 2. The probability that a random variable d(i) exceeds T , P rob(d(i) > T ), is equal to the marked area in Fig.

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Advances in Information and Computer Security: Second International Workshop on Security, IWSEC 2007, Nara, Japan, October 29-31, 2007. Proceedings by Satoshi Hada, Kouichi Sakurai (auth.), Atsuko Miyaji, Hiroaki Kikuchi, Kai Rannenberg (eds.)


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