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Course, academic year 2016/2017
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Fundamentals of Quasigroup Theory and Several Applications in Cryptography - NALG101
Title: Základy teorie kvazigrup a několik jejich aplikací v kryptografii
Guaranteed by: Department of Algebra (32-KA)
Faculty: Faculty of Mathematics and Physics
Actual: from 2009 to 2017
Semester: winter
E-Credits: 3
Hours per week, examination: winter s.:2/0, Ex [HT]
Capacity: unlimited
Min. number of students: unlimited
4EU+: no
Virtual mobility / capacity: no
State of the course: not taught
Language: Czech
Teaching methods: full-time
Teaching methods: full-time
Classification: Mathematics > Algebra
Annotation -
Last update: T_KA (10.05.2010)
The course will be in English. The main stress will be on the fundamentals of quasigroups and the applications to cryptography should not be considered as the central topic.
Literature - Czech
Last update: T_KA (23.05.2003)

V.D.Belousov, Osnovy teorii kvazigrupp i lup, Nauka, Moskva, 1967.

Syllabus -
Last update: T_KA (23.05.2003)

1. Definition of a quasigroup and a loop as a groupoid and as a system with three binary operations. Connections with latin squares and group transversals.

2. Subquasigroups, nuclei and the centre. Local units and idempotents. Multiplication groups. Inner mapping groups and their generators. Normal subquasigroups and congruences.

3. Albert's theorem. G-loops. Autotopies and autostrophies.

4. Medial kvasigroups. Toyoda-Murdoch-Bruck theorem. T-quasigroups. Distributive quasigroups. CH-quasigroups, F-quasigroups. Some properties of linear quasigroups.

5. Constructions: product and semidirect product. Crossed product of a quasigroup and a system of quasigroups.

6. Inverse quasigrups and their possible applications to cryptography.

7. n-ary quasigroups, in particular medial quasigroups and those of type T. Belousov theorem on n-medial quasigroups.

8. Codes with one check symbol as n-ary quasigroups. Properties and examples. Orthogonality of . n-quasigroups. Check function on n-quasigroups. Secret sharing from the standpoint of n-quasigroups.

9. About 20 problems of Belousov.

 
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