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TechnologyGenerated accuracy model review: 2026-05-06
Passphrase Strength Calculator accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- Entropy bits = words * log2(wordlist size) + extra random bits. Average crack time = 2^(entropy - 1) / guesses per second.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Random Words: 6
- Wordlist Size: 7,776
- Extra Random Bits: 0 bits
- Guesses per Second: 1,000,000,000
Expected outputs
- Estimated Entropy: 77.55 bits
- Average Crack Time: ~1e7 years
- Approx Search Space: ~1e23 combinations
Known limitations
- This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
- Use the result as a planning estimate unless the calculator page states a stricter purpose.
Assumptions
- Inputs are user-entered because pricing, deadlines, policies, and technical limits vary.
- Calculations run locally in your browser and do not store passwords, incidents, network designs, or security program data.
- This is planning math, not security assurance, legal advice, or a substitute for testing.
Unit handling
- Random Words accepts numeric values.
- Wordlist Size accepts numeric values.
- Extra Random Bits accepts values in bits.
- Guesses per Second accepts numeric values.
- Estimated Entropy is displayed in bits.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
- Input precision follows configured step values where provided.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current passphrase-strength-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Passphrase Strength Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.