Which attack is characterized by an entity illegitimately posing as another entity?

• A. Replay Attack
• B. Denial of Service
• C. Masquerade Attack
• D. Traffic Analysis

Answer: (C)

The term that best describes an attack where one entity illegitimately poses as another is a masquerade attack. This type of attack involves an attacker gaining unauthorized access to a network or system by impersonating a legitimate user or entity. The attacker typically exploits stolen credentials, social engineering tactics, or other means to present themselves as someone they are not.

Masquerade attacks can lead to various malicious activities, including unauthorized information access, data theft, and further exploitation of the system. Such attacks are particularly concerning because they can often bypass standard security measures by using the identity of someone trusted within the network or system.

In contrast, replay attacks involve intercepting and re-transmitting valid data to create illicit access but do not involve impersonation. Denial of service attacks aim to disrupt service availability rather than impersonate an entity. Traffic analysis concerns itself with monitoring and analyzing information about data flows rather than identity deception. Each of these attack types presents different challenges and requires specific defensive measures, highlighting the unique nature of masquerade attacks in information security.