CIAM (Customer Identity & Access Management) is where IAM meets real product constraints: conversion rates, support costs, fraud, privacy regulation, and at-scale reliability.
This page is vendor-agnostic by design: the concepts apply whether you use a homegrown stack or a CIAM platform.
Why CIAM needs fraud engineering
Consumer identity flows are prime targets for:
- credential stuffing
- account takeover
- bonus abuse
- fake account farms
Controls
Rate limiting + bot defense
- Rate limit by IP, device, account, and velocity
- Detect automation patterns
Anomaly detection
- Impossible travel / unusual geo
- Sudden device changes
- High-risk API sequences
Credential stuffing defense
- Use breached password checks
- Add friction after suspicious signals (step-up)
Checklist
- Consistent logging across login, recovery, and registration
- Clear playbook for account lock vs step-up
- Avoid permanent user lockouts without recovery