if the system is insecure. If a penetration test fails, it does not necessarily mean that the system is secure. Some penetration tests can be conducted with automated software that tests against existing exploits for known vulnerabilities. Other penetration tests are conducted by trained hackers. Many companies prefer to contract out this work as it simulates an outsider attack.

Vulnerability lifecycle

The vulnerability lifecycle begins when vulnerabilities are introduced into hardware or software. Detection of vulnerabilities

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