Field guide to randomness, entropy and RNGs: PRNG vs TRNG vs CSPRNG, the NIST SP 800-90A/B/C pipeline, min-entropy, conditioning, real-world seeding failures, and why Cloudflare's lava lamps harvest entropy instead of creating it. Born from a collaborative cross-review of a YouTube thread.
education security nist cryptography entropy prng seeding csprng randomness rng information-security random-number-generator field-guide lava-lamp trng entropy-source drbg min-entropy crypto-education sp800-90
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Updated
Aug 5, 2026 - Python