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Cryptography
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is the science of encoding a message into a form that is unreadable and making sure only the proper people are capable of decoding the message back into its original form. This is usually done by using an encryption algorithm and a decryption algorithm (these two are often the same) and very often ....
Middle of essay
....hq". To decrypt the message, the receivers would simply subtract 3 letters from each letter. This algorithm was later improved and called ROT13, where the letters could be shifted to any number between 1 and 25, and the number of letters shifted was the secret key. This very simple algorithm has been used on Usenet successfully to prevent people from inadvertently reading materials they might find offensive.
Monoalphabetic substitution is another simple step away from the ROT13 algorithm. In thi.... |
| Number of words: 3143 |
Approximate pages: 12 |
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