Free engineering tools

Randomness Security Tools

Practical tools for engineers working with entropy sources, random number generators, QRNG, TRNG and cryptographic randomness.

Calculate

Min-Entropy Calculator

Estimate the min-entropy implied by a most-probable outcome. Educational calculation; not an SP 800-90B assessment.

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Assess & plan

SP 800-90B Readiness Checker

Review whether key source characterization, data collection, health testing, conditioning and documentation areas have been addressed. No compliance score.

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Entropy Data Collection Planner

Generate a practical collection checklist for sequential, restart and conditioning datasets without uploading the data.

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Runs on your computer

Local SP 800-90B Entropy Assessment Kit

Run the official NIST EntropyAssessment tooling locally. Raw entropy data does not need to leave your computer.

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Explore & design

Randomness Standards Navigator

Understand how SP 800-90A, 90B and 90C relate, with links to NIST/BSI/ETSI context.

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RNG Architecture Builder

Sketch a conceptual source → health tests → conditioning → DRBG → application flow and get an engineering question list.

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Editorial boundary

These tools are educational and engineering aids. They do not provide certification, validation, security guarantees or standards-body endorsement. Interactive calculations run in your browser; the Local Entropy Assessment Kit runs on your own computer. QRNG.io never receives your entropy datasets.

New to the vocabulary? Start with the quantum randomness knowledge hub or the plain-language guide.