1. Kharkiv National Pedagogical University
UKRAINE
The Department of Computer Science
Visual models of cipher algorithms for students’ learning information security
Liudmyla Gryzunα, Denys Stolbovβ

2. Outline
1.Introduction.
2. Difficulties of students’ learning information security.
3. Examples of own visual models.
4. Conclusions.

3. General idea
to arouse students’ interest to study math, physics, computer science etc.

4. Cryptography as a chapter of information security course is not easy to learn for students
The students have problems with understanding some encryption algorithms, especially their complicated mathematical tools.
It is quite difficult for a teacher to explain for students main features of structure and functionality such algorithms.

5. Difficulties of explain students
a sense of encryption and decryption keys;
a mechanism of sharing and distribution those keys between sender and receiver.

6. Goal of using our virtual models
to explain students complex math models and algorithms of cipher algorithms in plain language.
In particular, give them (the students) intuitive understanding of encryption and decryption keys:
generation of the keys
sharing the keys
security of keys

7. Two types of cipher algorithms
Asymmetric algorithms use a pair of keys for encrypt/decrypt messages.
Symmetric algorithms use one key for encrypt/decrypt messages.

8. Examples of own visual models
(Color_model.ggb, Discrete_Logarithm.ggb)

9. Conclusion
Our virtual models are useful for students’ learning the basics of cryptography in both curricular and extracurricular activities.
The models give the students an opportunity to active study of cipher algorithms.

10. Denys Stolbovβ denystolbov@gmail.comβ
Q & A
Denys Stolbovβ