"Cryptography"

INTRODUCTION CRYPTOGRAPHY the science of the enciphering and deciphering of messages in abstr role code or cipher cryptography is use everywhere it protects money transfers and confidence card numbers absorb over the internet but its main pattern is to keep secret documents ensure from foreign governments TERMINOLOGY CRYPTOGRAPHY the science of the enciphering and deciphering of messages in secret code or cipher. PLAINTEXT the original message forwards encryption or after decryption CIPHERTEXT The encrypted form of the PLAINTEXT ENCRYPTION The process of converting the PLAINTEXT into a CIPHER. DECRYPTION The process of converting the CIPHER fag end into PLAINTEXT. CRYPTANALYSIS The science of recovering info from ciphers without knowledge of the key. CRYPTOSYSTEM a strategy for encrypting t separatelying. KEY The secret information know only to the transmitter and the manslayer which is used to encrypt and decrypt the message HISTORY cryptology has been used to conceal information in paper since writing was send-off developed, Egyptians are the for the first time knowN to used CRYPTOGRAPHY. Early Grecians similarly used cryptology, they en absorbed a piece of cloth almost a baton called a scytale and wrote the message on it. When it was uncover it looked like decorations and was worn as a robe by a servant and delivered to the receiver. When it was wrapped again around a scytale the message was easily read.

Another classic Polybius invented the Polybius checkerboard which was a 5 x 5 football field containing all the letters of the alphabet, each letter was converted into fiend numbers such as A becomes 11 - 1 2 3 4 5 1 A B C D E 2 F G H I/J K 3 L M N O P 4 Q R S T U 5 V W X Y Z ex. CAR is 131142 later the the 19th C. cryptodevices were invented they... If you want to get a full essay, order it on our website: Orderessay

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