Education Station:
Shifting and Masking with a Side of Crypto

By Edward Barnard

The basics can be tricky. This month we take a careful walk-through of a few lines of cryptographic code in PHP. This leads us through the difference between ones’ complement and two’s complement representation. We achieve weirdness by combining logical AND with integer addition.

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This article was originally published in the February 2018 issue of php[architect] magazine. You can read the complete article at the following links. To see the full issue, please subscribe or purchase the complete issue.

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