defensive design

defensive design

1. to keep programs from tampering you need to use defensive design

   • defensive design helps to ensure programs function properly
     • programmers try to protect their programs through defensive design
   • when programs are functioning correctly they should never break and never produce errors

2. the easiest way for a user to accidentally or intentionally misuse a program is when entering data

   • there are two ways that you can prevent users from entering something you don't want them to; input sanitisation or input validation.

3. programs can use a mixture of input sanitastion and validation to verify that the inputted