CEH defines ethical hacking as the authorized, structured, and permission-based process of identifying vulnerabilities to strengthen an organization's security posture. Ethical hackers operate under a signed scope- of-work and follow legal boundaries. Malicious hackers, by contrast, exploit systems without permission, often with harmful or criminal intent. CEH emphasizes that both ethical and malicious hackers may use similar tools, techniques, and methodologies; the distinction lies entirely in authorization, intent, and legality.
Ethical hacking is conducted to improve defenses, while malicious hacking targets exploitation, theft, or disruption. Nothing in CEH materials suggests that toolsets or work styles distinguish the two groups; permission and lawful operation remain the central differentiators.