argon2 (npm)
Node.js bindings for the Argon2 password hashing algorithm — OWASP's recommended password hashing algorithm and winner of the Password Hashing Competition. Supports Argon2id (recommended), Argon2i, and Argon2d variants with configurable time, memory, and parallelism cost parameters. Argon2id is memory-hard making it resistant to GPU and ASIC cracking attacks that can undermine bcrypt.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
OWASP-recommended algorithm. Memory-hard — resistant to GPU/ASIC attacks. Argon2id provides both side-channel resistance (Argon2i) and GPU resistance (Argon2d) in one variant. Industry-leading password security.
⚡ Reliability
Best When
Starting new Node.js authentication systems where OWASP compliance and maximum password security matter — Argon2id is the current gold standard.
Avoid When
Your deployment environment can't compile native addons — bcryptjs (pure JS bcrypt) is more portable if Argon2 native compilation fails.
Use Cases
- • Hash user passwords in new agent systems using Argon2id with OWASP-recommended parameters (memory=65536, iterations=3, parallelism=4)
- • Migrate from bcrypt to Argon2id in agent auth systems — hash new passwords with argon2 while verifying old bcrypt hashes during transition
- • Implement API key and token hashing for agent credential storage with stronger memory-hard protection against database breach attacks
- • Derive encryption keys from user passwords using Argon2 KDF with configurable salt for agent data encryption key derivation
- • Add configurable security cost parameters to agent auth systems that can be increased over time as hardware improves
Not For
- • Non-password use cases requiring speed — Argon2 is intentionally slow; use SHA-256/SHA-512 for data integrity checking where speed matters
- • Environments without native build tools — Argon2 uses a C native addon; bcryptjs (pure JS) may be simpler in restricted build environments
- • Key derivation from truly random keys — Argon2 is for human passwords; HKDF is more appropriate for deriving keys from already-random material
Interface
Authentication
No authentication — cryptographic library. argon2 IS the password auth primitive.
Pricing
argon2 npm package is open source and free.
Agent Metadata
Known Gotchas
- ⚠ argon2.verify() returns a boolean — never throws for wrong password; must check if (await argon2.verify(hash, password)) not try/catch for auth logic
- ⚠ Default parameters may need tuning for production — run benchmarks on your hardware and increase memoryCost/timeCost until hashing takes ~0.5s for your use case
- ⚠ Native addon requires build tools (gcc, python, make) at npm install time — add to Dockerfile: apt-get install build-essential before npm install
- ⚠ Alpine Linux requires additional packages for native compilation: apk add build-base python3 — arm builds may also need to install node-gyp globally
- ⚠ Argon2id is the recommended variant — Argon2i is for side-channel resistance only; Argon2d for GPU resistance only; use argon2.argon2id for general password hashing
- ⚠ Hash output includes variant and parameters encoded in the hash string — argon2.verify() auto-detects the correct variant; don't parse the hash string manually
Alternatives
Full Evaluation Report
Comprehensive deep-dive: security analysis, reliability audit, agent experience review, cost modeling, competitive positioning, and improvement roadmap for argon2 (npm).
AI-powered analysis · PDF + markdown · Delivered within 30 minutes
Package Brief
Quick verdict, integration guide, cost projections, gotchas with workarounds, and alternatives comparison.
Delivered within 10 minutes
Score Monitoring
Get alerted when this package's AF, security, or reliability scores change significantly. Stay ahead of regressions.
Continuous monitoring
Scores are editorial opinions as of 2026-03-06.