PHP Puzzles:
Ciphers and Cellular Automata

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Encrypting and decrypting messages were an early computing application. Last month’s challenge was to implement and harden a cipher from antiquity. Let’s look at possible solutions before moving on to this month’s challenge.

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This article was originally published in the June 2021 issue of php[architect] magazine. To read the complete article please subscribe or purchase the complete issue.

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