The main goal of computer forensics is to identify, collect, preserve, and analyze data in a way that preserves the integrity of the evidence collected so it can be used effectively in a legal case. Services specialising in the identification and recovery of digital evidence.
A penetration testing service (or pentest) is a form of ethical cyber security assessment designed to identify and safely exploit vulnerabilities affecting computer networks, systems, applications and websites so that any weaknesses discovered can be addressed in order to mitigate the risk of suffering a malicious attack.