Basic cryptography – the Caesar cipher
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One of the most basic encryption schemes is the Caesar cipher. It’s weak in practice, but a great way to learn how crypto works.
2022
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Modulo arithmetic with large numbers
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Modulo arithmetic with numbers large enough to ensure cryptographic security is complicated, particularly in PHP. Let’s work around that…
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Modulo exponentiation in PHP – three ways
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Modulo exponentiation lies at the core of most modern crypto. Learn three different ways to perform this calculation in PHP.
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Ethics in technology and advertising
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Ethics is one of the more complicated concepts in tech. Everyone knows what it is, but ethics become frighteningly easy to ignore.
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Today’s youth will define tomorrow’s technology
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The youth of today will define tomorrow’s technology. The world forgets this fact at our own peril.
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Understanding modulo arithmetic with clock functions
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Modulo arithmetic is at the core of most every secure asymmetric cryptography algorithm. Clock functions make it an easier topic to master.
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How do you stay current?
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What tools do you use to stay current with technology? Here are some podcasts and reading materials I use to stay up on new trends.
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Reducing associative arrays in PHP
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PHP doesn’t natively support passing associative arrays into array_map(). But there are ways to work around this limitation.
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Hashing is not encryption – redux
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Hashing and encryption are two different things, even if they’re built upon the same cryptographic foundation.
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Find it, buy it, build it
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How expensive is the open source tool you’ve found? How about the managed, hosted, SaaS alternative? Should you build your own instead?