Application security combines safe defaults, access checks, careful data handling, and timely updates.
Validate input at system boundaries and encode output for its destination. Use framework protections for sessions, CSRF, password handling, and parameterized database access.
Check authorization on every sensitive operation, including direct requests. Give accounts only the access they need and keep secrets outside source control.
Maintain dependencies and review useful security signals without logging passwords or tokens. A practiced response plan helps teams act quickly when an issue is found.
