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Chenthil Kumar K
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20 views2 pages

Shift Ciphersupload2

Uploaded by

Chenthil Kumar K
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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SHIFT CIPHERS

Caesar shift, is one of the simplest and most widely

known encryption techniques. It is a type of substitution

cipher in which each letter in the plaintext is replaced by a

letter some fixed number of positions down the alphabet.

If you have a message you want to transmit securely, you can

encrypt it (translate it into a secret code). One of the simplest

ways to do this is with a shift cipher. Famously, Julius Caesar

used this type of cipher when sending messages to his

military commanders. The mod mathematically deals with

the wrap-around at the end of the alphabet. This explains

why we use the numbers 0 through 25 instead of 1 through


26. The former choice makes this wrap-around issue much

easier to express mathematically.

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