Publications
Journals
2022
- Morten Øygarden, Patrick Felke, Håvard Raddum. Analysis of Multivariate Encryption Schemes: Application to Dob and C∗. submitted to Journal of Cryptology (invited by the program chairs of PKC 2021)
2018
- “On the security of biquadratic C∗ public-key cryptosystems and its generalizations”, Cryptography and Communications. 10.1007/s12095-018-0337-y, 2018
2006
- with H. Dobbertin, T. Helleseth, P. Rosendahl: ”Niho type cross-correlation functions via Dickson polynomials and Kloosterman sums”, IEEE Transactions on Information Theory 52(2), S. 613-627 (2006)
- with H. Dobbertin, G. Leander, A. Canteaut, C. Carlet, P. Gaborit: ”Construction of bent functions via Niho power functions”, Journal of Combinatorial Theory, Series A 113 (5), S. 779-798, 2006
Conferences and Workshops
2021
- Morten Øygarden, Patrick Felke, Håvard Raddum. Analysis of Multivariate Encryption Schemes: Application to Dob. https://link.springer.com/book/10.1007/978-3-030-75245-3
- To Shift or Not to Shift: Understanding GEA-1 , Christof Beierle and Patrick Felke and Gregor Leander , https://eprint.iacr.org/complete/
2020
- “The Multivariate Method strikes again – New Power Functions of low Differential Uniformity in odd Characteristic”, https://doi.org/10.1007/s12095-020-00437-z
- with Morten Øygarden, Håvard Raddum, Carlos Cid:” Cryptanalysis of the Multivariate Encryption Scheme EFLASH”, accepted to RSA 2020, Cryptographers Track
2019
- with Noureddine Boucif, Frederik Golchert, Frederik Gosewehr, Alexander Siemer: ”Crushing the Wave- New Z-Wave Vulnerabilities exposed”, preprint published (see https://arxiv.org/)
- with Ellingsen, Pal, Riera, Constanza, Stanica, Pantelimon, Tkachenko, Anton:” C-differentials, multiplicative uniformity and (almost) perfect c-nonlinearity”, submitted to IEEE Transactions on Information Theory.
2006
- with L.Budaghyan, C.Carlet, G.Leander: "An infinite class of quadratic APN functions which are not equivalent to power mappings", Proceedings of the IEEE International Symposium on Information Theory, ISIT 2006, S. 2637-2641, Seattle, Washington, USA
2005
- „On the Affine Transformations of HFE-Cryptosystems and Systems with Branches”, Coding and Cryptography: International Workshop, WCC 2005, Bergen, Norway, March 14-18, 2005, Springer, Lecture Notes in Computer Science, S.229-241, 2006
2004
- with G. Leander, Kai Schramm, Christof Paar:" A Collision-Attack on AES: Combining Side Channel- and Differential-Attack", Workshop on Cryptographic Hardware and Embedded Systems (CHES), Springer,Lecture Notes in Computer Science, vol. 3156, S.163-175, 2004
2003
- with N. Courtois, M. Daum: "On the Security of HFE, HFEv- and Quartz,PKC 2003", 6th International Workshop on Theory and Practice in Public Key Cryptography, Miami, FL, USA, January 6-8, 2003, Springer, Lecture Notes in Computer Science, S. 337-350
Recent Talks:
2019
- FrisiaCrypt 2019, Workshop on Boolean Functions and their Applications 2019
2018
- Workshop on Boolean Functions and their Applications 2018 (invited talk)
2017
- Mathematical Methods for Cryptography 2017