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“Defend the Web” write-up (Crypt 4 / Crypt — decrypting ciphertext using online decryptors)

A Caesar cipher, also known as Caesar’s cipher, the shift cipher, Caesar’s code, or Caesar shift in cryptography, is one of the most basic and well-known encryption schemes. It’s a substitution cipher in which each letter in the plaintext is replaced by a letter that’s a certain number of positions down the alphabet. With a left shift of 3, for example, D would become A, E would become B, and so on. Julius Caesar is credited with inventing the approach, which he utilized in his private communication.

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David Artykov

David Artykov

Cybersecurity Professional

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