Bcrypt Hash Verification
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Hash Analysis
Hash Format
Algorithm:
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Cost Factor:
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Valid Format:
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Security
Rounds:
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Security Level:
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Recommendation:
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Components
Salt Length:
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Hash Length:
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Total Length:
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Performance
Est. Time:
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Last Check:
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Checks Done:
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Hash Breakdown
Enter a bcrypt hash to see breakdown
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Algorithm identifier
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Work factor (rounds)
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Random salt value
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Computed hash value
Batch Verification
Hash Format Validation
Performance Testing
Verification Speed Test
Test Results
Total Time:
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Average per Check:
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Checks per Second:
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Cost Factor Impact:
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Running performance test...
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Bcrypt Verification Guide
How Verification Works:
- Extract salt and cost factor from hash
- Hash the plain password with same salt/cost
- Compare resulting hash with original
- Use constant-time comparison for security
Security Notes:
- • Each hash includes its own unique salt
- • Same password produces different hashes
- • Verification time depends on cost factor
- • Higher cost = better security but slower
Common Issues:
- • Invalid format: Check hash structure
- • Wrong algorithm: Ensure $2a$, $2b$, or $2y$
- • Truncated hash: Must be exactly 60 characters
- • Case sensitivity: Passwords are case-sensitive
- • Whitespace: Leading/trailing spaces matter
Best Practices:
- • Always use constant-time comparison
- • Implement rate limiting for login attempts
- • Log failed verification attempts
- • Consider account lockout policies
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