🔐 Security
2 blocks
Security Building Blocks
Protect your applications from attacks and bad data
Beginner
Input Validation
Imagine filling out a form at the doctor's office. The receptionist checks your paperwork (validation), then security scans your bag …
Beginner
Race Conditions
Two users click "Redeem" on the same coupon at the same millisecond. Your app checks if it's available for both, …