defensive design

defensive design

1. validation

   • checking weather the data should be allowed
     • should be sensible
     • removing special characters

2. input sanisitaion

   • cleaning up input data/removing unwanted data

3. verification

   • checking the data has been entered correctly

4. authentication

   • ensuring only authorized users are aloud access into the data

5. maintainable code

   • to allow other programmers to understand the code