Birthday Attack Calculator
Calculate birthday attack parameters, collision probability, time to collision, and attack feasibility for hash functions.
Inputs
bits
Results
Birthday Bound
400,651,869,298,001,200,000,000,000,000,000,000,000
50% Probability Bound
400,651,869,298,001,200,000,000,000,000,000,000,000
Time to Collision
0 years
Storage Required11,940,356,174,051,796,000,000,000,000,000 GB
Estimated Cost$4,006,518,692,980,011,700,000,000,000,000
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Formula
Birthday Bound ≈ √(2 × m × ln(1/(1-P)))Related Calculators
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