Cryptography (or cryptology) is the practice and study of hiding information.
The word is derived from the Greek:
Crypto comes from the Greek word Kryptos, meaning hidden,secret.
Graph-y derives from the Greek Graphein: To write.
The art of protecting information by transforming it (encrypting it) into an unreadable format, called cipher text.
Only those who possess a secret key can decipher (or decrypt) the message into plain text.
Encrypted messages can sometimes be broken by cryptanalysis, also called codebreaking, although modern cryptography techniques are virtually unbreakable.
Julius Caesar , CESAR Imperator , dixit:
INANIJ JY ANSHJX
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3 Words in Latin
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