Encryption, process of converting messages, information, or data into a form unreadable by anyone except the intended recipient. Encrypted data must be deciphered, or decrypted, before it can be read by the recipient. The root of the word encryption-crypt-comes from the Greek word kryptos, meaning hidden or secret. In its earliest form, people have been attempting to conceal certain information that they wanted to keep to their own possession by substituting parts of the information with symbols, numbers and pictures, this paper highlights in chronology the history of Cryptography throughout centuries.
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