Institut Mines-telecom

Institut Telecom/telecom Paristech

Philippe Laurier

Michel Riguidel

Laurent Ladouari

A network includes communication media transmitting streams to addressees, and a method includes: step of allocation of a cryptonymic identity to communication media by a first instance, the streams transmitted by a medium bearing a mark, as a function of its cryptonym, the cryptonymic identity of a medium being distinct from its real identity; step of reading and of analyzing the streams by a second instance, the analysis including a phase of identifying streams to their communication media by searching for similarity between the mark of the streams and the cryptonymic identity of the media, with the aid of a table listing the cryptonyms, and a phase of logging observable characteristics of the streams through the network. A behavior defined by a set of characteristics is declared typical or atypical by comparison with a given set of criteria, the table of cryptonymic identities having no link with the real identities. The invention is applied notably for combating illegal downloads, the sending of material that is unsolicited or likely to cover up identifiable malicious intentions.

Method of tracing and of resurgence of pseudonymized streams on communication networks, and method of sending informative streams able to secure the data traffic and its addressees

A method of checking and protecting data and identities within a communication or computing process between at least one author and at least one recipient comprises at least: a step of allocation by an anonymization authority of one and the same stamp forming a cryptonymic marking, to one or to several different authors and to their objects; a step of inserting said stamp into the communication or computing protocol associated with the data stream, by means of a stamp system, the protocol containing the identity of said author or of said object of the author or authors, and each author being able moreover to simultaneously have a plurality of different cryptonyms; a step of reading, at at least one recipient, of said protocol by means of a reading system able to detect the presence of said stamp.

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Saint Pierre des Corps, France

Philippe Laurier