Claude Code
auth
Password Hashing Not Secure Enough
Passwords are hashed but using a weak algorithm. Plain MD5, SHA-1, or simple salted SHA-256 is used instead of proper password hashing. Security audit flags the implementation as inadequate for protecting user credentials.
Password storage exists but doesn't use modern algorithms that resist brute-force attacks.
Error Messages You Might See
Security audit: weak password hashing
Password algorithm not sufficient
MD5 hashing detected (insecure)
Common Causes
- Using non-password-specific algorithm: SHA-256, SHA-512 are too fast for passwords
- Insufficient salt or no salt at all
- Hash function not iterated: bcrypt, argon2 are intentionally slow
- Key derivation instead of password hash: PBKDF2 acceptable but bcrypt/argon2 better
- No pepper (application secret) combined with salt
How to Fix It
Use bcrypt (industry standard) or argon2 (newer, stronger). Never use: MD5, SHA-1, SHA-256 alone. Library handles salt and iteration automatically. Example: bcrypt.hash(password, 10) - 10 is cost factor. Verify: bcrypt.compare(password, hash). If migrating: rehash on next login, don't bulk convert.
Real developers can help you.
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Richard McSorley
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Get HelpFrequently Asked Questions
Why is bcrypt better than SHA-256?
bcrypt is slow by design (intentional CPU cost). SHA-256 is fast (designed for checksums). Slow = expensive for attackers trying brute force.
How to use bcrypt?
Hash: bcrypt.hash(password, 10). Verify: bcrypt.compare(password, hash) returns true/false. 10 is cost (higher = slower).
How to migrate from weak hashing?
Don't bulk upgrade. On next login, verify old hash, then rehash with bcrypt and store new hash. Old hashes deleted eventually.