Defensive Design

Defensive Design

1. Authentication

   • Ensuring that authorised users can gain access

2. Verification

   • Checking whether the data has been inputted correctly
   • E.g - Double entry requirements, visual check

3. Input Sanitisation

4. (Input) Validation

   • Checking if the data meets certain criteria and is suitable before passing it down into the rest of the program
   • E.g - Age cannot be below 0 or above 1000

5. Maintainable Code

   • Making sure that the program can be easily understood by other programmers for development
   • E.g - Commenting, indentation, clear and meaningful variable/constant names