QA testing focuses on ensuring that software meets its functional requirements and operates as expected. QA testers typically test software from the perspective of a regular user. Security testing is focused on identifying and fixing vulnerabilities in software that could be exploited by attackers. Security testers typically test software from the perspective of a malicious user.
It’s important to note that QA testing cannot replace security testing. Even if the software passes all of its QA tests, it still might have security vulnerabilities. Thus, it’s essential to test its security for identifying and fixing these vulnerabilities before the software gets released to the public.