1.Security goals
   • Security Goals in Information Security  
2.security attacks
   • Security attacks in Information Security  
3.passive attack types
   • Passive attack types in Information S...  
4.Basic terms in information security
   • Basic terms in information security  
5.Caesar cipher
   • Caesar cipher(Substitution cipher) in...  
6.Affine cipher
   • Affine cipher(Substitution cipher)Inf...  
7.playfair cipher
   • Playfair cipher(Substitution cipher)I...  
8.Multiplicative inverse
   • Multiplicative inverse in Information...  
9.multiplicative cipher encryption
   • Multiplicative cipher encryption(Subs...  
10.multiplicative cipher decryption
   • Multiplicative cipher decryption(Subs...  
11.Autokey cipher
   • Autokey cipher(Substitution cipher)In...  
12.Hill cipher
   • Hill cipher(Substitution cipher)Infor...  
13. Vernam cipher
   • Vernam cipher(Substitution cipher)Inf...  
14. Vigenere cipher
   • Vigenere cipher(Substitution cipher)I...  
15.Raifence cipher
   • Railfence cipher(Transposition cipher...  
16. Railfence cipher when depth not given
   • Railfence cipher when depth not given...  
17.Columnar cipher
   • Columnar transposition cipher(Informa...  
18.Gcd of alphabets
   • GCD of alphabets(Information Security)  
19.Euclidean algorithm
   • Euclidean Algorithm(Information Secur...  
20.Extended Euclidean algorithm
   • Extended Euclidean algorithm(Informat...  
21.Euler's Totient function
   • Euler's totient function(Information ...  
22.Fermat's Theorem
   • Fermats theorem(Information Security)  
23.Euler's Theorem
   • Euler's theorem(Information Security)  
24 .Chinese Remainder Theorem
   • Chinese Remainder Theorem(Information...  
25)Diffie Hellman Key Exchange Cryptosystem
   • Diffie Hellman key exchange cryptosys...  
26) Simplified DES(Data Encryption standard)
   • Simplified DES(Data Encryption Standa...  
27)RSA algorithm
   • RSA(Rivest-Shamir-Adleman) Algorithm(...  
28) Elgamal Digital Signature Scheme
   • Elgamal Digital signature scheme(Info...