24-03-2012, 11:12 AM
Cryptography
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Cryptography is the science of information security.
The word is derived from the Greek kryptos, meaning hidden.
Cryptography includes techniques such as microdots, merging words with images, and other ways to hide information in storage or transit.
Overview of Cryptography & Its Applications
People wants and needs privacy and security while communicating.
In the past, cryptography is heavily used for militaryapplications to keep sensitive information secret from enemies (adversaries).
Nowadays, with the technologic progress as our dependency on electronic systems has increased we needmore sophisticated techniques.
Cryptography provides most of the methods and techniquesfor a secure communication
Cryptography components
Encryption – It is a process of changing or converting normal text or data information into gibberish text.
Decryption – It is a process of changing or converting gibberish text back to correct message or data by using encryption method.