2.3 producing robust programmes

2.3 producing robust programmes

1. defencive desighn is an approach to software development that aims to produce robust and reliable programmes .

   • anticipating misuse of the programme
     • writing maintainable code that helps others diagnose problems if they arise
       • testing the programme with sutibale test data to identify and fix errors before it is put into general use
         • adopting a defencive desighn approach can help prevent bugs in programmes from causing unwanted consequences such as deleting important data or bieng exploited by cybercriminals to take over (hijack) the host machine.
           • robust vs reliable programmes
             • robust programmes can handle unexpected inputs and data without crashing and without bieng tricked into malicious situations
               • reliable programmes will work as intended under many different conditions or situations
                 • we can confirm that programs are both robust and reliable through well planned testing
                   • anticipating misuse
                     • there are a number of ways that a system could be misused that a developer should consider
                       • malicious inputs could be used in an atempt to hack a system input sanitisation and validations can help prevent this