1- Caesar Encryption and Decryption 2- Transposition Encryption and Decryption 3- Play Fair Encryption and Decryption 4- Poly Alphabetic Encryption and Decryption 5- Full Vigenere Encryption and Decryption 6- Affine Cipher Encryption and Decryption 7- Hill Cipher Encryption and Decryption 8- Combination of Substitution and Transposition Encryption and Decryption 9- One Time Pad Encryption and Decryption 10- RSA Encryption and Decryption  11- DES  12- Hashing