Which term describes the act of using information obtained for non-official purposes?

The term that best describes the act of using information obtained for non-official purposes is "Misuse of Information." This term specifically highlights the inappropriate utilization of information that was intended for official use, but has been diverted for personal or unauthorized purposes. It captures the essence of using sensitive or proprietary data in a manner that is not aligned with its intended use, potentially leading to breaches of trust, security violations, or other risks associated with improper handling of information.

In contrast, the other terms generally focus on different aspects of information misuse. "Illegal Information Use" typically pertains to actions that violate laws explicitly, while "Unauthorized Information Access" refers to the act of gaining access to information without permission. "Information Abuse" can encompass a broader range of unethical behaviors surrounding information handling, but does not specifically denote the intent of using the information for non-official purposes. Thus, "Misuse of Information" is the most precise term in this context.