Cryptography involves communication between two users through coded message. Cryptography is an art and science of concealing the information to introduce privacy and secrecy between the intended users. The three basic goals of security are Confidentiality, Integrity and Availability. Cryptography involves three basic mechanisms Symmetric-Key Encipherment or Private Key Asymmetric-Key... [Read More]

Polyalphabetic Vigenere Cipher Polyalphabetic cipher is a type of substitution cipher where each occurrence of a character may have a different substitute. That means that a single character in the plain text set may map to many characters in cipher text set. In polyalphabetic cipher, the cipher text is dependent... [Read More]