An Acceptable Use Policy (AUP) is a foundational administrative control and a formal document that outlines the rules and behaviors expected of employees, contractors, and other stakeholders when using an organization’s information technology assets. These assets include computers, networks, internet access, email systems, and mobile devices. The primary purpose of an AUP is to protect the organization from legal liability, security breaches, and productivity losses by clearly defining what constitutes "acceptable" versus "forbidden" activity.

A robust AUP typically covers several key areas:

Prohibited Activities: Explicitly forbidding illegal acts, harassment, accessing inappropriate content (such as pornography), or using company resources for personal gain.

Data Protection: Requiring employees to protect passwords and sensitive data, and forbidding the unauthorized installation of software.

Monitoring and Privacy: Informing users that the company reserves the right to monitor network traffic and that there is no expectation of privacy on corporate systems.

Consequences: Stating the disciplinary actions that will be taken if the policy is violated.

From an ethical hacking and auditing perspective, the AUP is often the first document reviewed. If a user’s poor security habits lead to a breach, the AUP provides the legal and administrative framework for the organization to respond. Furthermore, a well-communicated AUP serves as a "deterrent control," discouraging employees from engaging in risky behaviors that could open the door to social engineering or malware infections. It is a critical component of "Governance, Risk, and Compliance" (GRC) within any enterprise.