Application security covers every measure that protects software from threats – from design through development and operation to decommissioning. It ties secure coding, testing tools and processes into one continuous chain.
At a glance
Security belongs in the design, not in the acceptance test.
Automated checks in the pipeline catch the bulk of standard mistakes.
Third-party libraries are part of your application – and of your responsibility.
Application security starts at design, not at testing. The later a weakness is found, the more expensive it is to fix.
Across the whole lifecycle
Threat modelling at design time, secure coding and code review during development, automated checks in the pipeline and monitoring in production all interlock. If one link fails, the chain does not hold.
Real-world examples
- A code review catches an SQL injection before the code ever reaches production.
- A dependency scan flags a known weakness in a library that was pulled in.
Common misconception
Myth “A penetration test at the end is enough.”
Reality A test at the end finds what is still there – it prevents nothing. The cheapest corrections happen at design time.
Frequently asked questions
Where does application security begin?
At design. The ten most common classes of flaw are listed in the OWASP Top Ten.
Is one tool enough?
No. Static analysis, dependency scanning and runtime testing each find different faults; the BSI IT-Grundschutz describes how they fit together.