Ebook: Cryptography Demystified

Pt. I. Introduction to Symmetric Cryptography. Module 1. First Considerations. Module 2. Plaintext. Module 3. Digitization of Plaintext. Module 4. Toward a Cryptographic Paradigm. Module 5. What We Want from the Keytext. Module 6. Randomness I. Module 7. Finite State Sequential Machines. Module 8. M-sequences. Module 9. The Paradigm Attempted. Module 10. The Block Cipher Function -- A Modern Keystone to the Paradigm. Module 11. Confidentiality Modes: ECB and CTR. Module 12. Confidentiality Mode: Output Feedback (OFB). Module 13. Confidentiality Modes: Cipher Feedback (CFB) and Cipher Block Chaining (CBC) -- Pt. II. Number Theory we will Need. Module 14. Prime Numbers I. Module 15. Congruences. Module 16. Euler-Fermat Theorem