This document discusses various encryption techniques including transposition ciphers, one-time pads, quantum cryptography, symmetric-key algorithms like DES and AES, cipher modes, other ciphers, cryptanalysis, and product ciphers. It provides examples and basic elements of techniques like quantum cryptography, DES, AES, and product ciphers which use permutation boxes, substitution boxes, and products to encrypt data.

1. Cipher Text Parameter
Prof. Neeraj Bhargava
Kapil Chauhan
Department of Computer Science
School of Engineering & Systems Sciences
MDS University, Ajmer

2. Transposition Ciphers
A transposition cipher.

3. One-Time Pads

4. Quantum Cryptography
An example of quantum cryptography.

5. Symmetric-Key Algorithms
• DES – The Data Encryption Standard
• AES – The Advanced Encryption Standard
• Cipher Modes
• Other Ciphers
• Cryptanalysis

6. Product Ciphers
Basic elements of product ciphers.
 (a) P-box. (b) S-box. (c) Product.

7. Product Ciphers
Basic elements of product ciphers.
 (a) P-box. (b) S-box. (c) Product.