My solutions to the programming projects that accompany Dan Boneh's crypto course
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Jul 8, 2022 - JavaScript
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crib-dragging
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A CLI/TUI app and Python module for breaking One Time Pad ciphers with re-used keys using dictionary-enhanced, automated crib-dragging.
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Mar 2, 2026 - Python
Browser-based one-time pad demo — perfect-secrecy encrypt/decrypt, then the two-time-pad break: XOR two ciphertexts under a reused key and crib-drag to recover both plaintexts. Real XOR over real bytes. No backends. No simulated math.
cryptography otp cryptanalysis cipher xor-cipher shannon one-time-pad classical-cipher stream-cipher crypto-lab perfect-secrecy crib-dragging two-time-pad key-reuse keystream-reuse
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Jul 15, 2026 - TypeScript
Deal a shuffled deck of cards into a keystream to hands-on teach one-time keys, key reuse attacks, and stream ciphers. Encrypt messages, share via QR, then crack a reused deck with crib dragging. A client-side Cipher Museum PWA with CTF challenge mode and educator materials.
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Jul 18, 2026 - TypeScript
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