Browsing by Author "Sunar, B."

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    CDs have fingerprints too
    (Springer, Berlin, Heidelberg, 2009) Hammouri G.; Dana, Aykutlu; Sunar, B.
    We introduce a new technique for extracting unique fingerprints from identical CDs. The proposed technique takes advantage of manufacturing variability found in the length of the CD lands and pits. Although the variability measured is on the order of 20 nm, the technique does not require the use of microscopes or any advanced equipment. Instead, we show that the electrical signal produced by the photodetector inside the CD reader is sufficient to measure the desired variability. We investigate the new technique by analyzing data collected from 100 identical CDs and show how to extract a unique fingerprint for each CD. Furthermore, we introduce a technique for utilizing fuzzy extractors over the Lee metric without much change to the standard code offset construction. Finally, we identify specific parameters and a code construction to realize the proposed fuzzy extractor and convert the derived fingerprints into 128-bit cryptographic keys. © 2009 Springer.
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    ItemOpen Access
    License distribution protocols from optical media fingerprints
    (Springer International Publishing, 2010) Hammouri, G.; Dana, A.; Sunar, B.
    According to the Business Software Alliance about 35% of the global software market, worth $141 Billion, is counterfeit. Most of the counterfeit software is distributed in the form of a compact disc (CD) or a digital video disc (DVD) which is easily copied and sold in street corners all around the world but mostly in developing countries. Given the severity of the problem at hand, a comprehensive solution taking into account the manufacturing process, economical implications, ease of enforcement, and the owner’s rights needs to be developed. While this is an enormous undertaking requiring new schemes at all levels of implementation, in this work, we focus only on a small part of the problem, i.e., secure fingerprinting techniques for optical media.