Τομέας Υπολογιστικών Συστημάτων και Εφαρμογών
Library of the School of Science

2015-11-20

2015

Παπαευγενίου Λυκούργος

Α?γγελος Κιαγια?ς

Oblivious Downloading Protocol with Asymmetric Fingerprinting

English

Αγνωστική Μεταφορά με Ασύμμετρους Κώδικες Αποτύπωσης

The purpose of this thesis is to implement an Oblivious Download Protocol that
uses Asymmetric Fingerprinting and is at the same time Communication Optimal.

Having those characteristics, the protocol provides a scheme where a large file
stored in a server is transmitted to a set of users in a way that each user
obtains a different “version” of the file, that effectively works like a
fingerprint. If a “pirate” copy of the files leaks, the server can never
implicate innocent users. Moreover, if any (appropriately bounded) subset of
users collude to produce a “pirate” copy, it is always possible for the server
to prove to a third party judge the implication of at least one of them.

Such a protocol would be useful in cases where copyrighted content is
distributed and leakage of content’s copies is not allowed.

The implementation follows an earlier version of the published paper
«Communication Optimal Tardos-Based Asymmetric Fingerprinting» by A. Kiayias,
N. Leonardos, H. Lipmaa, K. Pavlyk and Q. Tang.

Oblivious Transfer, Public Key Cryptography, Homomorphic Encryption, Asymmetric Fingerprinting, Tardos Code

Yes

11-12

Yes

19

45

File access is restricted only to the intranet of UoA.

https://pergamos.lib.uoa.gr/uoa/dl/object/1324565