The document discusses Simplified Data Encryption Standard (S-DES), outlining its input of an 8-bit plain text block and a 10-bit key, producing an 8-bit cipher text output. It covers the key generation process and the encryption function used in S-DES. The document provides specific details about the permutation used in the encryption process.

1. CS 8792- CRYPTOGRAPHY AND
NETWORK SECURITY
- SDES
By
K.DHIVYA,
AP/ECE
RMK COLLEGE OF ENGINEERING AND TECHNOLOGY
CHENNAI

2. SIMPLIFIED DES (S-DES)
INPUT
 8-bit block of plain text.
 10 bit key
OUTPUT
 8 bit cipher text

3. SIMPLIFIED DES

5. SDES KEY GENERATION

6. KEY GENERATION FOR SIMPLIFIED DES

8. SDES ENCRYPTION

10. SDES ENCRYPTION

11. FUNCTION F
E/P
4 1 2 3 2 3 4 1

12. P4
2 4 3 1