NOT a characteristic of intruders during the first era of computer security?

• A. The intruders were usually insiders.
• B. Only a few people had access and the appropriate skills to intrude into computer systems.
• C. Intruders sought knowledge and resources to continue their use of computers
• D. Most intruders engaged in recreational intrusion.

Answer: (D)

In the first era of computer security, intruders were usually insiders or people who already had some level of access, and the pool of individuals with the right skills to break in was small. The driving motive of intruders was to gain knowledge and to extend or continue using the computer resources, not simply to hack for recreation. So the idea that most intruders engaged in recreational intrusion doesn't fit that period; the typical pattern was purposeful access aimed at learning, testing capabilities, or maintaining access to resources. The statements that intruders were often insiders, that only a few had access and the necessary skills, and that they sought knowledge and resources to keep using the systems all align with the historical picture.