Contents:

1. Basic notions of information theory
1.1. Information source
1.2. Measure of information and entropy

2. Source coding
2.1. Basic types of codes
2.2. Optimal code
2.3. Error-correction codes
2.4. Limits of messages transmission

3. Data compression
3.1. Text compression
3.2. Principles of audio compression
3.3. Principles of image compression

4. Basic methods of cryptography
4.1. Substitution
4.2. Cryptoanalysis of Vigenere's cipher
4.3. Encryption standard DES
4.4. New encryption standard AES

5. Public key cryptosystems
5.1 Principles of RSA method
5.2 Determining of public and private keys
5.3 Other public key cryptosystems