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What is the main purpose of cryptography in information systems security?

Which type of attack involves tricking a computer into following instructions not intended by the original program developer, often leading to the replication of the attack to other computers?

Matthew captures traffic on his network and notices connections using ports 20, 22, 23, and 80. Which port normally hosts a protocol that uses secure, encrypted connections (SSH Secure Shell)?

Denial of service (DoS) attacks are larger in scope than distributed denial of service (DDoS) attacks.

A dictionary password attack is a type of attack in which one person, program, or computer disguises itself as another person, program, or computer to gain access to some resource.

Hypertext Transfer Protocol (HTTP) is the communications protocol between web browsers and websites with data in cleartext.

Which group is the most likely target of a social engineering attack?

Rootkits are malicious software programs designed to be hidden from normal methods of detection.

Suppose we have the matrices

In the previous question we showed that