Person or software interested in breaking computer security to access, modify, or damage data. Also see Cracker.
a person who attempts to gain unauthorized access to a system, to damage that system, or to disturb data on that system
An entity that gains or attempts to gain access to a system or system resources without having authorization to do so.
any unauthorized individual who tries to access a computer system from outside; also referred to as an attacker.
An Intruder, sometimes referred to as a Hacker, is a person who attempts to gain unauthorized access to a system, to cause damage, or to alter data.
An individual who gains, or attempts to gain, unauthorized access to a computer system or to gain unauthorized privileges on that system. See also: Hacker.
Any person who has gained unauthorised access to the protected premises.