This paper provides the summary of cryptography & the areas where it is used or applied. Information Security is the method or the process to secure the information or data from unauthorized access. Cryptography is one of the methods to protect the data by making the data unreadable from all except users belongs to the category of sender or receiver. Cryptography is the process of secret writing that is hides the content of information from all except the sender and the receiver. As the use of technology increase, the probability of cyber-attack may be increase. So cryptography is kind of process that make sure about the data authentication, unauthorized access of data, confidentiality of data and integrity of data.
Cryptography, Electronic Signature, Hashes, Virtual Private Network
