/ʌnˈɔːθəraɪzd ˈjuːzəʳ/ – Phrase
Definition: 1. việc sử dụng không có thẩm quyền;
2. người sử dụng không có thẩm quyền.
A more thorough explanation: An unauthorized user refers to an individual who gains access to a computer system, network, or other digital resource without permission or legal authority to do so. This person may not have the necessary credentials, consent, or authorization to use the system, and their actions are typically considered a violation of the law or the terms of service governing the use of the system.
Example: The company’s security policy prohibits unauthorized users from accessing confidential information stored on the server.