Security • Estimated 35m

Random Number Generators

fundamentals.random-number-generators

Random number generators turn entropy into values used for keys, nonces, and other security-sensitive operations. TRNGs obtain randomness from physical sources, while PRNGs and CSPRNGs expand an internal state and remain secure only when that state is seeded and managed correctly.

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Curated resources (3)

• NIST: Random Number Generation (article) Overview of entropy sources, random bit generation, PRNGs, and deterministic random bit generators.
• NIST Glossary: Pseudorandom Number Generator (article) Defines deterministic generators and the conditions under which a cryptographic PRNG can be unpredictable.
• Technical Deep Dive into the Entropy Issue (article) Shows how a hardware RNG integration error routed wallet seed generation through a software fallback PRNG.

Direct prerequisites (1)

• Cryptographic Entropy

Direct dependents (1)

• COLDCARD RNG Incident

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