A Survey on Various Encryption and Decryption Techniques

Abstract

Cryptography is the practice and study of techniques for secure communication in the presence of third parties [called
adversaries]. More generally, it is about constructing and analyzing protocols that overcome the influence of adversaries
and which are related to various aspects in information security such as data confidentiality, data integrity, authentication,
and non-repudiation. Cryptography prior to the modern age was effectively synonymous with encryption, the conversion of
information from a readable state to apparent nonsense. The originator of an encrypted message shared the decoding
technique needed to recover the original information only with intended recipients, thereby precluding unwanted persons to
do the same. Since World War I and the advent of the computer, the methods used to carry out cryptology have become
increasingly complex and its application more widespread.