scroll to top
Stuck on your essay?
Get ideas from this essay and see how your work stacks up
Word Count: 1,364
INTRODUCTION CRYPTOGRAPHY the science of the enciphering and deciphering of messages in secret code or cipher cryptography is used everywhere it protects money transfers and credit card numbers used over the internet but its main purpose is to keep secret documents secure from foreign governments TERMINOLOGY CRYPTOGRAPHY the science of the enciphering and deciphering of messages in secret code or cipher PLAINTEXT the original message before 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 back into PLAINTEXT CRYPTANALYSIS The science of recovering information from ciphers without knowledge of the key CRYPTOSYSTEM a system for encrypting information KEY The secret information known only to the transmitter and the receiver which is used to encrypt and decrypt the message HISTORY cryptology has been used to conceal information in writing since writing was first developed Egyptians are the first knowN to used CRYPTOGRAPHY Early Greeks also used cryptology they wrapped a piece of cloth around a baton called a scytale and wrote the message on it When it was unwrapped 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 Greek Polybius invented the Polybius checkerboard which was a 5 x 5 grid containing all the letters of the alphabet each letter was converted into two numbers such as A becomes 11 - 1 2 3 4 5 1 A B C D E 2 F G H IJ 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 used mechanical rotors to scramble messages most famous were the German
@Kibin is a lifesaver for my essay right now!!
- Sandra Slivka, student @ UC Berkeley
Wow, this is the best essay help I've ever received!
- Camvu Pham, student @ U of M
If I'd known about @Kibin in college, I would have gotten much more sleep
- Jen Soust, alumni @ UCLA