What does "complete session hijacking" involve?

Complete session hijacking indeed involves a full two-way communication breach between a user and a server. This occurs when an attacker takes control of a user's active session, allowing them to impersonate the user within that session. By doing so, the attacker can intercept, manipulate, or relay communications in real time, effectively gaining unauthorized access to sensitive information or operations that the legitimate user is performing.

In the context of security, complete session hijacking poses a significant threat because the attacker does not simply listen in on the conversation; they can engage in active participation, making decisions and executing commands on behalf of the user without their consent. This level of access can lead to severe security breaches, including unauthorized fund transfers, data theft, and privacy violations.

The other options do not capture the full scope of what complete session hijacking entails. One-way communication methods merely allow sending information in one direction, which does not represent the interactive nature of complete hijacking. Secure communication protocols are designed to prevent such attacks from occurring in the first place, rather than describing the attack itself. Redirecting internet traffic describes another type of attack, potentially related but not synonymous with the fully interactive and bidirectional nature of session hijacking.