Ethical Hacking

Ethical hacking is a security service aimed to break into a system with legal permission of its owner. Ethical hacking allows verifying resistance of a network, system or website to hacker attacks, without any harmful or dangerous actions which usually occur during a real hacker intrusion.

Today the most popular appliance of ethical hacking is a penetration testing. People who work in the ethical hacking field are often called ethical hackers or penetration test experts.
Security Glossary

Ethical Hacking
Exploit