Definition: A cracker is an individual who possesses a level of skill and knowledge with computers that makes it possible for him or her to interfere with the confidentiality, integrity and availability of information security systems. The intent of the individual is usually nefarious. The word isn’t commonly used to describe people who want to bring direct harm to particular information systems. Historically, a “hacker” was simply an individual who was highly skilled in working with and customizing electronics and electronic devices.
Its Relevance: Owners of information systems must be concerned about intrusions. Regardless of the word used to describe unauthorized access into an information system the risk is real and could result in the loss of confidentiality, integrity and available of an organization’s information assets.