CECC 2020

20th Central European Conference on Cryptology

June 24 - 26, 2020, Zagreb, Croatia

Organized by QuantiXLie Center of Excellence and
Department of Mathematics, Faculty of Science, University of Zagreb

The conference will be held at Hotel Westin, Izidora Kršnjavoga 1, Zagreb
All talks will take place in the room Maksimir, at ground floor on the right.

Announcement: Since a reasonable number of speakers and participants will be able to come to Zagreb, the program committee decided that we hold the conference in Zagreb, June 24 - June 26, 2020 as originally planed. We will combine presentations of speakers who come to Zagreb, with prerecorded presentations of other participants.
Links to some video presentations can be found below.
Zoom Instructions

Program Committee:

Andrej Dujella - University of Zagreb (chairman)
Nicolas Courtois - University College London
László Csirmaz - Central European University
Claus Diem - University of Leipzig
Peter Gaži - IOHK Research
Jan Hajny - Brno University of Technology
Clemens Heuberger - Alpen-Adria-Universität Klagenfurt
Bernadin Ibrahimpašić - University of Bihać
Aleksandar Jurišić - University of Ljubljana
Matija Kazalicki - University of Zagreb
Miroslaw Kutylowski - Wroclaw University of Science and Technology
Vashek Matyáš - Masaryk University, Brno

Florian Mendel - Infineon Technologies
Filip Najman - University of Zagreb
Karol Nemoga - Slovak Academy of Sciences
Attila Pethő - University of Debrecen
Andrea Pintér-Huszti - University of Debrecen
Stefan Porubsky - Czech Academy of Sciences
Havard Raddum - Simula UiB, Norway
Vincent Rijmen - KU Leuven and University of Bergen
Martin Stanek - Comenius University
Rainer Steinwandt - Florida Atlantic University
Damian Vizar - CSEM, Switzerland
Pavol Zajac - Slovak University of Technology in Bratislava

Local Organizing Committee:

Andrej Dujella
Zrinka Franušić
Matija Kazalicki
Ivan Krijan
Filip Najman
Tomislav Pejković
Vinko Petričević
Antonela Trbović

Invited speakers:

Elena Andreeva (Technical University of Denmark): Forkciphers: New cryptographic primitives, video, pdf
Lilya Budaghyan (University of Bergen): Optimal cryptographic functions solving hard mathematical problems, video, pdf
Florian Mendel (Infineon Technologies): Authenticated Encryption, video, pdf
Marcin Pawlowski (International Centre for Theory of Quantum Technologies): Quantum random number generators, video, pdf

Accepted contributed talks:

Samed Bajrić: Sufficient conditions of five-valued spectra Boolean functions, pdf
Reni Banov: Computing minimal DNF of Boolean functions for digital implementations, video, pdf
Anatolii Bessalov, Lyudmila Kovalchuk, Nataliia Kuchynska, Oleksandr Telizhenko: Algorithm for short messages encryption on twisted Edward curves, video, pdf
Nicolas T. Courtois, Matteo Abbondati, Aidan Patrick: On reducing annihilation degree inside nonlinear invariant attacks on T-310 and DES, video, pdf
Nicolas T. Courtois, Marek Grajek: On weak rotors, latin squares, linear algebraic representations, invariant differentials and cryptanalysis of Enigma, video, pdf
Laszlo Csirmaz: Multipartite secret sharing revisited, video, pdf
Krisztián Dsupin, Szabolcs Tengely: Discrete logarithm problem in some families of sandpile groups, video, pdf
Hayder Hashim, Alexandra Molnár, Szabolcs Tengely: Cryptanalysis of ITRU, video, pdf
Clemens Heuberger, Dunja Pucher: An algorithm for optimal joint expansion with odd digits, video, pdf
Gennady Khalimov, Yevgen Kotukh, Svitlana Khalimova: Encryption scheme based on the extension of automorphism group of the Hermitian function field, video, pdf
Andreas Klinger, Stefan Wüller, Giulia Traverso, Ulrike Meyer: Hierarchical and dynamic threshold Paillier cryptosystem without trusted dealer, video, pdf
Lyudmila Kovalchuk, Mariia Rodinko, Roman Oliynykov: Security of Poseidon hash function against linear and differential attacks with respect to field operations, video, pdf
Bohdan Kovalenko, Anton Kudin: Evaluation and minimization of kleptography risks in cryptographic algorithms, video, pdf
Liliya Kraleva, Raluca Posteuca, Vincent Rijmen: Cryptanalysis of the permutation based algorithm SpoC, video, pdf
Victor Ruzhentsev: Comparative analysis of ARX transformations, video, pdf
István András Seres, Péter Burcsi: A note on Low Order assumptions in RSA groups, video, pdf
Pavel Stetsenko, Gennadiy Khalimov: Provision mechanism of authenticity of data origin in cloud environment based on Blockchain technology, pdf
Peter Špaček, Pavol Sobota: Musipher: Hiding information in music composition, video, pdf
Peter Švec, Roderik Ploszek: A review of encryption schemes used in modern ransomware, video, pdf
Ádám Vécsi, Attila Pethő: Formal language Identity-based Cryptography, video, pdf
Pavol Zajac, Alena Bednarikova: Experimental algebraic differential cryptanalysis of SPN, video, pdf

Book of abstracts

Poster

Participants

Conference photos

Program:

Tuesday, June 23

Wednesday, June 24

Thursday, June 25

Friday, June 26

17:30 - 19:00 Welcome party and Registration
Hotel Westin 17th floor

9:00 - 9:30 Registration
9:30 - 9:45 Opening and Announcements

9:45 - 10:35 Budaghyan
10:40 - 11:00 Hashim

11:05 - 11:30 coffee break

11:30 - 11:55 Kotukh
12:00 - 12:20 Kraleva

12:30 - 14:00 lunch

14:00 - 14:45 Courtois
14:50 - 15:10 Kovalchuk

15:15 - 15:45 coffee break

15:45 - 16:15 Csirmaz
16:20 - 16:30 Kovalchuk-Kuchynska

9:00 - 9:50 Pawlowski
9:55 - 10:10 Vécsi
10:15 - 10:40 Pucher

10:45 - 11:15 coffee break

11:15 - 11:40 Abbondati
11:45 - 12:10 Zajac

12:20 - conference photo

12:30 - 14:00 lunch

14:00 - 15:00 Andreeva
15:05 - 15:30 Seres

15:35 - 15:55 coffee break

15:55 - 16:15 Dsupin
16:20 - 16:30 Ruzhentsev
16:35 - 16:55 Kovalenko

17:15 - 19:00 city sightseeing

19:00 - conference dinner

9:00 - 10:00 Mendel
10:05 - 10:25 Klinger
10:30 - 10:55 Banov

11:00 - 11:20 coffee break

11:20 - 11:35 Švec-Ploszek
11:40 - 11:55 Špaček-Sobota

12:00 - 12:30 rump session and CECC 2021 announcement

12:40 - 14:00 lunch

Program in pdf: short version, longer version

The aim of the conference is to bring together researchers in all aspects of cryptology, including but not limited to:

cryptanalysis,
cryptocurrencies,
cryptographic applications in information security,
design of cryptographic systems,
encryption schemes,
general cryptographic protocols,
post-quantum cryptography,
pseudorandomness,
signature schemes,
steganography.

Submissions must come in the form of an extended abstract of no more than 2 pages (including references) (longer submissions will be automatically rejected), describing novel original work of the authors. Extended abstracts should be submitted electronically, preferably by sending a PDF file to the chairman of the program committee to the e-mail address duje@math.hr. The deadline for the submission of extended abstracts is April 10, 2020. The submissions will be reviewed by the program committee and authors will be informed about acceptance or rejection by April 30, 2020.

Registration fee: 120 EUR (900 kn)

Registration web page at Perfecta Travel agency

Important dates:

January 4, 2020: 1st announcement and call for abstracts
April 1, 2020: 2nd announcement and registration open
April 10, 2020: Submission of abstracts (two pages long extended abstracts)
April 30, 2020: Authors notification of acceptance/rejection
June 5, 2020: Registration deadline
June 24-26, 2020: The conference
October 31, 2020: Submission deadline for the proceedings

Selected papers will be published in the Conference Proceedings, as a special issue of the journal Rad HAZU, Matematičke znanosti.
The journal is published by Croatian Academy of Sciences and Arts.
It is indexed in Scopus, Emerging Sources Citation Index (a part of Web of Science Core Collection), MathSciNet and Zentralblatt MATH.
Submission deadline for the proceedings is October 31, 2020.

A brief history of The Central European Conference on Cryptology:

2001: TATRACRYPT '01, Liptovský Ján, Slovakia
2002: HajduCrypt '02, Debrecen, Hungary
2003: TATRACRYPT '03, Bratislava, Slovakia
2004: WARTACRYPT '04, Bedlewo, Poland
2005: MoraviaCrypt '05, Brno, Czechia
2006: NYÍRCRYPT '06, Nyíregyháza, Hungary
2007: TATRACRYPT '07, Smolenice, Slovakia
2008: 8th Central European Conference on Cryptography, Graz, Austria
2009: 9th Central European Conference on Cryptography, Trebič, Czechia
2010: 10th Central European Conference on Cryptography, Bedlewo, Poland
2011: 11th Central European Conference on Cryptography, Debrecen, Hungary
2012: 12th Central European Conference on Cryptography, Smolenice, Slovakia
2013: 13th Central European Conference on Cryptography, Telč, Czechia
2014: 14th Central European Conference on Cryptography, Budapest, Hungary
2015: 15th Central European Conference on Cryptography, Klagenfurt, Austria
2016: 16th Central European Conference on Cryptography, Piestany, Slovakia
2017: 17th Central European Conference on Cryptography, Warsaw, Poland
2018: 18th Central European Conference on Cryptography, Smolenice, Slovakia
2019: 19th Central European Conference on Cryptography, Telč, Czechia

Contact: Andrej Dujella (duje@math.hr)

Financially supported by the QuantiXLie Center of Excellence, a project co-financed by the Croatian Government and European Union through the European Regional Development Fund - the Competitiveness and Cohesion Operational Programme (Grant KK.01.1.1.01.0004).