WMC 2008
Santander, SPAIN, October 23-25

Programme

Thursday 23 October
8:00 – 8:55		Registration
9:00 – 9:50	Michael E. Pohst	On solving norm form equations in (global function) fields	Chairman: Igor Shparlinski
9:55 – 10:45	Simon R. Blackburn	Cryptanalysing the critical group
		Coffee Break
11:20 – 11:40	Nicolas Courtois and Gregory Bard	Random permutations statistics in cryptanalysis of periodic block ciphers	Chairman: Kenny Paterson
11:45 – 12:05	Elena Dubrova	How to increase the throughput of an NLFSR-based stream cipher
12:15 – 13:15	Álvar Ibeas	Pseudorandom sequences prediction and Cayley graphs description by means of integer lattices	Thesis Dissertation
13:30		Lunch
15:30 – 16:20	Kenny Paterson	Identity-based cryptography - with and without bilinear maps	Chairman: Rainer Steinwandt
16:25 – 17:15	Jean-Charles Faugère	On the complexity of the MinRank problem
		Coffe Break
17:50 – 18:25	Poster Presentations	Authors have five minutes for each poster	Chairman: David Sevilla
Friday 24 October
9:00 – 9:50	Igor Shparlinski	Pairing friendly elliptic curves and finite fields	Chairman: Alexander May
9:55 – 10:45	Arne Winterhof	On the k-error linear complexity of subsequences of Sidelnikov sequences
		Coffee Break
11:20 – 12:10	Joachim von zur Gathen	Subset sum pseudorandom generators	Chairman: Jean-Charles Faugère
12:15 – 12:35	Massimo Caboara, Fabrizio Caruso, and Carlo Traverso	Block lattice polly cracker, theory and practice
12:40 – 13:00	Vasyl Ustimenko	On the hidden discrete logarithm for some polynomial stream ciphers
13:30		Lunch
15:30 – 16:20	Alexander May	Solving RSA problems with lattice reduction	Chairman: Simon Blackburn
16:25 – 16:45	Simon Fischer, Willi Meier, and Dirk Stegemann	Some remarks on FCSRs and implications for FCSR-based stream ciphers
		Coffee Break
17:10 – 18:00	Carles Padró	Algebraic manipulation detection codes	Chairman: Vladimir Shpilrain
18:05 – 18:25	Jean-Charles Faugère and Ludovic Perret	High order derivatives and decomposition of multivariate polynomials
20:45		Social Dinner: Bodega del Riojano
Saturday 25 October
9:30 – 10:20	Rainer Steinwandt	On asymmetric encryption and digital signature with the same key	Chairman: Arne Winterhof
10:25 – 11:15	Joan-Josep Climent	On the characterization and construction of bent functions of n+1 variables from Boolean functions of n variables
		Coffee Break
11:50 – 12:40	Oriol Serra	Cycle codes of graphs and MDS array codes	Chairman: Joachim von zur Gathen
12:45 – 13:05	Mario Lamberger, Tomislav Nad, and Vincent Rijmen	Numerical solvers in cryptanalysis
13:10 – 13:30	Andrei Prasolov	Polynomial mappings and crypto-protocols
14:00		Lunch
16:00 – 16:50	Tony Shaska	Automorphism groups of superelliptic curves	Chairman: Michael Pohst
16:55 – 17:45	Vladimir Shpilrain	Authentication schemes
17:50		Closing

The posters will be displayed in the area of coffee breaks throughout the workshop.

Contributed posters

David Arroyo, Rhouma Rhouma, Gonzalo Álvarez, Verónica Fernández, and Safya Belghith	On the skew tent map as base of a new image chaos-based encryption scheme
Massimo Caboara, Fabrizio Caruso, and Carlo Traverso	Heterogeneous lattice metrics and the NTWO cryptosystem
Jaime Gutiérrez and Álvar Ibeas	Recovering a sum of two squares decomposition
Roman Popovych	A note on Agrawal Conjecture
Marina Pudovkina	Some generalized Feistel ciphers and wreath products of symmetric groups
Marina Pudovkina	Symmetry groups of some classes of cryptographic boolean functions
Nurdan Saran and Ali Doğanaksoy	Choosing parameters for time-memory trade offs via new parameters