Software → Security
Input Validation
Checking external input before it is trusted, stored, interpreted, or used in sensitive operations.
Motivation
Input Validation is useful because it gives engineers a precise handle on a recurring problem: checking external input before it is trusted, stored, interpreted, or used in sensitive operations.. It helps you decide what to pay attention to, what abstractions are available, and which tradeoffs matter in real systems.
Where it fits
Input Validation belongs to the Software track, inside the Security layer. In the knowledge graph, this places it near concepts that explain the same level of abstraction and the neighboring ideas it depends on.
Mental model
Think of Input Validation as one piece of the larger computing map. It is easiest to understand when you ask two questions: what problem does it solve, and what assumptions does it make about the concepts below it?
Common mistakes
- Using Input Validation as a buzzword without understanding the problem it solves.
- Learning the definition in isolation instead of connecting it to nearby concepts.
Related concepts
- Requires: Source Code
- Relates to: CORS