Find a SECReT supervisor
Information for overseas students
View SECReT animation
Download SECReT brochure

Theodosis Mourouzis

PHD TITLE

"Computational Cryptography: Investigation of NP-hard problems related to number-theoretic cryptography and symmetric ciphers"


FIRST DEGREE

1)BA/MA with Honours in Mathematics (University of Cambridge)
2)Master of Advanced Studies in Mathematics (Number Theory Group, University of Cambridge) 
3)Master of Research in Security Science (Department of Security and Crime and Department of CS,UCL)

I'M ORIGINALLY FROM...

Athens,Greece

WHY I APPLIED TO THE SECURITY SCIENCE DTC

The multi-dimensionality of the real problems that we have to face in nowadays makes the multi-disciplinary research very crucial. In order to be able to contribute successfully to the security field you need to be able to understand solutions arising from many different other disciplines. The general idea behind the DTC is the promotion of this multi-disciplinary way of thinking and co-operation.

RESEARCH INTERESTS

cryptanalysis of hash functions, cryptanalysis of cryptosystems, algebraic attacks, finite field algebra, computational complexity (especially multiplicative), optimization of arbitrary algebraic computations over general settings, optimization of cipher's representations for cryptanalysis use, computational and algebraic number theory

WHAT I DO WHEN I'M NOT STUDYING

football,swimming,reading books.

MY CAREER ASPIRATIONS

Contribute scientifically to the area of security

WHAT KIND OF PARTNER ORGANISATION I'D LIKE TO WORK WITH AND WHAT I'D LIKE FROM THEM

IT consulting companies and laboratories which promote research on mathematics applied to computer science or on general security problems.  

PUBLICATIONS

Nicolas Courtois, Theodosis Mourouzis: Black-Box Collision Attacks on the Compression Function of the GOST Hash Function. Appears at the 6th International Conference on Security and Cryptography proceedings, SECRYPT 2011, 18-21 July, Seville, Spain.

Nicolas T.Courtois, Daniel Hulme and Theodosis Mourouzis.,2011.Solving Circuit Optimisation Problems in Cryptography and Cryptanalysis, . Appears in electronic proceedings of 2nd IMA Conference Mathematics in Defence 2011, 20 October 2011, Defence Academy of the United Kingdom, Swindon, UK.

Nicolas T. Courtois, Daniel Hulme, Theodosis Mourouzis: Solving Circuit Optimisation Problems in Cryptography and Cryptanalysis (extended version). In SHARCS 2012, workshop without formal proceedings, 70 participants, Washington DC, 17-18 March 2012. On page 179 of the workshop record. .

Nicolas T.Courtois, Daniel Hulme and Theodosis Mourouzis.,2012. Multiplicative Complexity and Solving Generalized Brent Equations With SAT Solvers. In COMPUTATION TOOLS 2012, The Third International Conference on Computational Logics, Algebras, Programming, Tools, and Benchmarking, July 22-27, 2012 - Nice, France. Published in: conference, ISBN: 978-1-61208-222-6, Pages: 22 to 27, Copyright: Copyright (c) IARIA, 2012, Date: 22 July 2012, full paper vailable here. We have received the Best Paper Award.

Nicolas T. Courtois, Theodosis Mourouzis and Pho V. Le.,2012. Extension of de Weger’s attack on RSA with large public keys. In SECRYPT 2012, 24-27 July, Rome, Italy

Full magazine article entitled "Automated Algebraic Cryptanalysis", IT security magazine Hakin9 Extra 6/2012

CONFERENCES ATTENDED

1)4rth European Security Research Conference ,Stockholm Sweden , 29-30 Sep 2009
2)1st IEEE International Workshop on Information Forensics and Security , London UK ,6-9,Dec 2009
3)1stSecurity Science Spring School, UCL , London UK, 15-16 Feb 2010
4)Itherm 2010, Las Vegas USA, 02-05 June 2010
5)4th International Crime Science Conference, London UK, 15 July 2010
6)UCL Security and Crime Research Network Conference 2010, 6 Dec 2010, UK, London
7) The 14th IACR International Conference on Practice and Theory of Public Key Cryptography Conference (PKC 2011), 6-9 March,Taromina Italy
8) ECRYPT II Summer School, Design and Security of Cryptographic ALgorithms and Devices, 29 May - 3 June 2011, Albena, Bulgaria

9) Algorithmic Trading Conference, 28 June 2011, UCL, London
10) SECRYPT 2011, International Conference on Security and Cryptography, July 18-21, Seville,Spain

11) 2nd IMA Conference Mathematics in Defence 2011, 20 October 2011, Defence Academy of the United Kingdom, Swindon, UK

12) 5th International Crime Science Conference, London UK, 15 July 2011

13) ECRYPT II Summer School on Tools, 28 May - 1 June 2011, Mykonos, Greece