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I built an open source Go tool that animates a 2-of-2 threshold ECDSA signing ceremony in your terminal. Real keys, real nonces, real signatures — all computed live. Here’s why I built it and how it works.
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Private keys are the backbone of digital security — and a single point of failure. Threshold signatures split that risk across multiple parties, and the DKLS23 protocol does it in just three rounds. Here’s how it works and why it matters.
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With a new server set up, the next step in the great migration was to start moving services to it from the cloud. First up, my toy encrypted secret sharing service!
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The final Cryptopals challenge in set 1 involves detecting AES when used in ECB mode. It will become a handy utility later on …
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Next up with Cryptopals is a challenge to decrypt AES in ECB mode. This is relatively easy in PHP!
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A return to Cryptopals means we get to break the repeating-key cipher we were working with before. Breaking crypto is fun!
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Let’s geek out on my favorite form of authentication – not sending passwords over the wire in the first place!
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Breaking encryption is fun. Building an encryption cipher is even more so! Let’s continue our Cryptopals journey with XOR.
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Now that we know how to crack a single-byte XOR cipher, let’s expand and crack even more through Cryptopals’ next challenge.
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Next up in our Cryptopals walkthrough is some frequency analysis against simple cryptographic keys. Let’s have some fun!