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Building Software Armour
Building Software Armour
Defensive design is programming like a pessimist - assuming everything that can go wrong, will go wrong. It's like building a castle with thick walls, a moat, and guards. You don't wait for attackers - you prepare for them. This means checking inputs, handling errors gracefully, and writing code others can understand. A good programmer doesn't trust users to enter sensible data or other programmers to use functions correctly!
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Exam Tips
- Validation vs Sanitisation: Validation checks data is acceptable; sanitisation cleans/removes dangerous content
- Why maintain? Other programmers may need to update your code
- Link to security: Input sanitisation prevents SQL injection and XSS attacks
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Quiz · Question 1 of 15
What is the purpose of input validation in a program?
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