Overview
- S-DES encryption algorithm Input : 8-bit block of plaintext(ex:10111101), 10-bit Key Output : 8-bit block of cyphertext
- S-DES decryption algorithm Input : 8-bit block of cyphertext, 10-bit Key(위와 동일한)
Output : 8-bit block of plaintext
- 5개의 function
ㆍ IP : (Initial permutation) 최초로 들어온plaintext에 대한 초기 치환을 수행
ㆍ : key에 의해