WAIFI 2026 Program. [PDF]

Wednesday, 3 June   -- Place: Sala de Grados. Facultad de Derecho

9:00 - 9:30   Registration at Facultad de Derecho. Opening

Invited Talk 1   (Chair: Domingo Gómez Pérez)

9:30 - 10:30   Delaram Kahrobaei.
Recent Trends and Future Directions in Post-Quantum Group-based Cryptography in the AI Era. [ABSTRACT]

Session 1   (Chair: Domingo Gómez Pérez)

10:30 - 10:55   Claude Carlet.
A notion on S-boxes for a partial resistance to some integral attacks.

10:55 - 11:20   Noemí DeCastro-García, Lucía Mallo-Fernández and Miguel V. Carriegos.
Output feedback transformations for preserving observability and structural decodability in convolutional codes.

11:20 - 11:50   Break (Cafetería Derecho - 2nd Floor)

Session 2   (Chair: Domingo Gómez Pérez)

11:50 - 12:15   Virginio Fratianni and Sihem Mesnager.
Self-Orthogonal Codes from p-ary Quadratic Forms via Character Sums with Applications to LCD and Arbitrary Hull Dimensional Codes.

12:15 - 12:40   Satoru Fukasawa.
Algebraic geometry codes with many automorphisms arising from Galois points.

12:40 - 13:05   Beatriz García García, Consuelo Martínez López and Ignacio F. Rúa.
The Non-Asymptotic Landscape of Abelian Codes: A Framework for (F,G)-Goodness.

13:05 - 14:30   Lunch (Cafetería Derecho - 2nd Floor)

Invited Talk 2   (Chair: Lejla Batina)

14:30 - 15:30   Violetta Weger.
How hard is code equivalence?. [ABSTRACT]

Session 3   (Chair: Lejla Batina)

15:30 - 16:00   Break (Cafetería Derecho - 2nd Floor)

16:00 - 16:25   Marc Joye.
Boolean Arithmetic over F2 from Group Commutators.

16:25 - 16:50   Christian Kaspers and Alexander Pott.
A new construction of locally-APN functions on F22m using spreads and Sidon sets.

16:50 - 17:15   Michiya Iwata, Ryomei Sugai, Kosuke Sakata and Tsuyoshi Takagi.
Explicit Bounds on the Existence Probability of Random Multivariate Quadratic Systems over Finite Fields.

19:00 - 20:00   Welcome Cocktail at Palacio de la Magdalena (First Floor)

Thursday, 4 June   -- Place: Salón de Actos. Escuela Técnica Superior de Náutica

Invited Talk 3   (Chair: Ferruh Özbudak)

9:30 - 10:30   John Sheekey.
Arithmetic of Finite Semifields. [ABSTRACT]

Session 4   (Chair: Ferruh Özbudak)

10:30 - 10:55   Vincent Macri, Michael Jacobson and Renate Scheidler.
Improvements to Jacobian Arithmetic in Global Function Fields.

10:55 - 11:20   Nicolas Méloni, François Palma and Pascal Véron.
Equality Tests in the Polynomial Modular Number System.

11:20 - 11:50   Break (E.T.S. Náutica - Main Hall)

Session 5   (Chair: Ferruh Özbudak)

11:50 - 12:15   Ryo Negishi, Kazuki Komine, Akira Katayama and Masaya Yasuda.
On the (Non-)Existence of Efficient Class Group Orbits for Collision Search in CSIDH.

12:15 - 12:40   Francisco Javier Soto Sánchez.
Codegrees and an Exact Triangle Formula for the Norm-One Cayley Graph over Fq3 in Characteristic 2.

12:40 - 13:05   Hugo Rodrigues Teixeira, Claude Gravel and Daniel Panario.
Constructing a parameterized polynomial map through functional graphs and applications.

13:05   Conference Group Photo

13:05 - 14:30   Lunch (Cafetería E.T.S. Náutica - Ground Floor)

Session 6   (Chair: Vishnupriya Anupindi)

14:30 - 14:55   Kohtaro Yamaguchi and Shushi Harashita.
Automorphism groups of hyperelliptic curves of 2-rank zero.

14:55 - 15:20   Seon Jeong Kim and Masaaki Homma.
Classification of Hermitian-relative curves up to projective equivalence.

15:20 - 16:15   Break + Poster Session (E.T.S. Náutica - Main Hall)

Short Talks Session

16:15 - 16:35   Gary McGuire.
A Conjecture on Primitive Polynomials.

16:35 - 16:45   James A. Davis.
Generalized Denniston Partial Difference Sets.

16:45 - 16:55   Ryutaroh Matsumoto.
Impure codes exceeding the pure bounds for quantum local recovery.

16:55 - 17:05   Nikolay Kaleyski and Joakim Hauger Sunde.
Testing and reconstructing CCZ- and EA-equivalence of vectorial Boolean functions.

17:05 - 17:15   Anamari Nakić.
Additive Steiner 2-designs.

17:15 - 17:20   Short break

17:20 - 17:30   I.F. Rúa, E.F. Combarro, and J. Ranilla.
Knuth orbits of semifields of order 128 with a nontrivial automorphism.

17:30 - 17:40   Francisco Javier Soto.
On BLR linearity testing for trace monomials over binary fields.

17:40 - 17:50   David González González.
Differential Goppa codes.

17:50 - 17:55   Short break

17:55 - 18:05   Fernando Neranga.
Reversed Dickson Polynomials Over Finite Fields.

18:05 - 18:15   Fernando Neranga.
Quandle Rings and Their Applications in Coding Theory.

18:15 - 18:25   Verónica Requena Arévalo.
Construction of Generalized Weighing Hadamard Matrices over (Fp).

20:00 - 21:30   Conference Dinner at La Caseta de Bombas

Friday, 5 June   -- Place: Sala de Grados. Facultad de Derecho

Session 7   (Chair: José Luis Imaña)

10:00 - 10:25   Miguel Alcocer-Pérez, Nathalie Bochard, Viktor Fischer, Ana Isabel Gómez and Domingo Gómez-Pérez.
Period Counting versus Direct Sampling in Oscillator-based TRNGs: Architectures and Characteristics.

10:25 - 10:50   Daichi Aoki and Tsuyoshi Takagi.
Designing PMNS for 8-bit Architectures.

10:50 - 11:15   Doaa Ashmawy and Arash Reyhani-Masoleh.
From Compact to Fast: Exploring 32- and 64-Bit AES Datapaths for IoT Systems.

11:20 - 11:50   Break (Cafetería Derecho - 2nd Floor)

Session 8   (Chair: Daniel Panario)

11:50 - 12:15   Erkay Savaş, Ali Sah Ozcan and Cihangir Tezcan.
Fast and Energy-Efficient Polynomial Multiplication using FFT, FFNT, and NTT on GPUs for Fully Homomorphic Encryption.

12:15 - 12:40   Olav Geil.
On secret sharing from extended norm-trace curves.

12:40 - 13:05   Martin Grenouilloux, Chunlei Li and Pierrick Méaux.
On the Resilience Order of Weightwise Almost Perfectly Balanced Functions.

13:05 - 13:15   Closing Remarks

14:30 -   Informal Social Activity in Santander