International Association for Cryptologic Research

Ph.D. Database

The aim of the IACR Ph.D. database is twofold. On the first hand, we want to offer an overview of Ph.D. already completed in the domain of cryptology. Where possible, this should also include a subject classification, an abstract, and access to the full text. On the second hand, it deals with Ph.D. subjects currently under investigation. This way, we provide a timely map of contemporary research in cryptology. All entries or changes need to be approved by an editor. You can contact them via phds (at)


Sondre Roenjom (#321)
Name Sondre Roenjom
Personal Homepage
Institution University of Bergen
Topic of his/her doctorate. Cryptanalysis of Ciphers over Finite Cyclic Groups
Category secret-key cryptography
Keywords Cryptanalysis, stream ciphers, block ciphers
Ph.D. Supervisor(s) Tor Helleseth
Year of completion 2009
Abstract A new efficient attack on stream ciphers, complexity analysis of computing Gröbner bases for sufficiently generic systems of equations, nonlinear equivalence of ciphers
E-Mail Address sondre (at)
Last Change 2011-04-12 08:35:30
To provide an update on this entry, please click .

Contact: phds (at)

[ IACR home page ] [ IACR PhDs page ] © IACR