Maths and Computing:

Caesar Cipher: Caesar Cipher

Caesar Cipher

The Caesar Cipher is a substitution cipher.

With a shift value of 3 each letter is replaced with the letter that is 3 positions further forward

Decryption

With a shift value of 3 each letter is replaced with the letter that is 3 positions further back. Alternatively, this is the equivalent of replacing each letter with the letter that is 23 positions further back

Example

The grid below shows the substution values for a shift value of 3

plaintext

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b

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f

g

h

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ciphertext

d

e

f

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a

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Caesar Cipher Question

Decode jyaru

Enter Answer

Shift = 9

plaintext

a

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d

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f

g

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j

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ciphertext

j

k

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n

o

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a

b

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d

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i

The answer is: april