Which of the following involves sharing or revealing personal or sensitive information to other parties without the knowledge and consent of the data subject?

The question asks for an action that involves "sharing or revealing personal or sensitive information to other parties without the knowledge and consent of the data subject."

• Phishing: This is a fraudulent attempt to obtain sensitive information (like usernames, passwords, and credit card details) by disguising oneself as a trustworthy entity in electronic communication. It's about acquiring information, not sharing or revealing it.
• Access Due to Negligence: This refers to unauthorized access to information that occurs because of a lack of proper care or security measures. While it can lead to data breaches, it describes the cause of access, not the act of sharing or revealing the information.
• Espionage: This involves spying to obtain secret information, often for national security or competitive advantage. While it deals with sensitive information, the question's focus is on the act of sharing or revealing without consent, which is more broadly covered by data privacy terms.
• Unauthorized Disclosure: This term directly means revealing or making personal or sensitive information known to individuals or entities who are not authorized to receive it, and it is done without the data subject's knowledge or consent. This perfectly matches the description in the question.

"Unauthorized Disclosure" is the most accurate description of sharing or revealing information without the data subject's knowledge and consent.

The final answer is $\text{Unauthorized Disclosure}$.