Explanation:
Only a small fraction of computer program code is mathematically proven, or even goes through comprehensive information technology audits or inexpensive but extremely valuable computer security audits, so it is quite possible for a determined cracker to read, copy, alter or destroy data in well secured computers, albeit at the cost of great time and resources. You may reduce a cracker’s chances by keeping your systems up to date, using a security scanner or/and hiring competent people responsible for security.