Bcrypt Work Factor & Hash Cost Benchmark
Calculate iteration count (2^cost), server latency, and GPU cluster brute-force resistance.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. No data is ever transmitted across the network.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
How to Use Bcrypt Work Factor & Hash Cost Benchmark
Slide the work factor between 4 and 18.
View the exact iteration count (2^cost) and estimated server latency per password verification.
Check OWASP compliance recommendations and copy the benchmark summary.
Frequently Asked Questions
What bcrypt cost factor is recommended by OWASP?
OWASP recommends a minimum bcrypt work factor of 10 to 12 for standard interactive web applications (aiming for ~250ms verification latency).
Why does incrementing the bcrypt cost factor double calculation time?
Bcrypt's work factor is logarithmic: cost N executes 2^N key expansion rounds, so each +1 cost doubles the total computational iterations.
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