An Authentication Security Review is not a checklist. It’s a forensic investigation of how identity is created, verified, and maintained in every corner of your system. Code, configs, third‑party services, logs—everything matters. Attackers don’t guess passwords anymore. They map flows. They chain small mistakes until they own the whole account.
Strong reviews begin with credential lifecycle. How are passwords, API keys, and OAuth tokens created? Are they stored encrypted at rest? Is access salted, hashed, and rotated on a schedule? Look deep at distribution too. Keys sent by email, stored in code repos, or cached in browsers are silent risks.
Next, inspect session management. Does your session expire on idle? Are refresh tokens short‑lived? Is there a binding between a session and a device or network context? Harden cookie settings. Block replay attacks with one‑time tokens and nonce values.
Evaluate every authentication factor. Passwords alone are brittle. Implement MFA with TOTP or hardware keys. Avoid SMS codes except as a last resort. For SSO, validate that identity assertions are signed and scoped narrowly. Log and alert on abnormal login patterns immediately.
Don’t ignore the out‑of‑band and recovery flows. Password reset endpoints are high‑value targets. Are recovery links single‑use? Do they expire quickly? Are they protected against enumeration? Audit your “forgot password” UX for signals an attacker could automate.
The review ends with continuous validation. Authentication is not “set and forget.” Ship code with strict linting for security configs. Run automated pen tests against auth endpoints. Patch dependencies often. Every change should trigger another targeted review.
If you want to see a fully hardened authentication flow in action without waiting weeks, spin it up on hoop.dev and watch it live in minutes. Your system’s front door should be the hardest part to break. Start there.