Certified pseudonyms colligated with master secret key

Pasupathinathan, Vijayakrishnan, Pieprzyk, Josef, & Wang, Huaxiong (2009) Certified pseudonyms colligated with master secret key. In Fernández-Medina, Eduardo, Malek, Manu, & Hernando, Javier (Eds.) Proceeding of the International Conference on Security and Cryptography (SECRYPT 2009), INSTICC Press, Setúbal, Milan, Italy, pp. 190-197.


A pseudonym provides anonymity by protecting the identity of a legitimate user. A user with a pseudonym can interact with an unknown entity and be confident that his/her identity is secret even if the other entity is dishonest. In this work, we present a system that allows users to create pseudonyms from a trusted master public-secret key pair.

The proposed system is based on the intractability of factoring and finding square roots of a quadratic residue modulo a composite number, where the composite number is a product of two large primes. Our proposal is different from previously published pseudonym systems, as in addition to standard notion of protecting privacy of an user, our system offers colligation between seemingly independent pseudonyms. This new property when combined with a trusted platform that stores a master secret key is extremely beneficial to an user as it offers a convenient way to generate a large number of pseudonyms using relatively small storage.

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ID Code: 70161
Item Type: Conference Paper
Refereed: No
Additional URLs:
Keywords: Anonymity, Identification, Colligated Pseudonyms, TPM
ISBN: 9789896740054
Subjects: Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > COMPUTATION THEORY AND MATHEMATICS (080200)
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2009 Please consult the authors
Deposited On: 15 Apr 2014 02:59
Last Modified: 03 Jul 2014 01:54

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