When someone shares private information without permission, they may be committing which tort?

Sharing private information without permission constitutes a violation of a person's right to privacy, making "invasion of privacy" the correct identification of the tort in question. This tort encompasses various forms of misconduct, including the unauthorized disclosure of confidential details about an individual which can lead to emotional distress and harm to their reputation.

Invasion of privacy can manifest in different ways, such as the public disclosure of private facts, which occurs when someone reveals personal information about another person without their consent and that information is not newsworthy. The act of disclosing this private information can be deemed harmful, especially if it portrays the individual in a negative light or exposes them to embarrassment.

Other torts mentioned, such as trespass, slander, and assault, are distinct in nature. Trespass relates to unlawful intrusion onto someone's property, slander involves making false spoken statements that damage someone's reputation, and assault refers to the threat or attempt of physical harm to another person. None of these directly address the wrongful act of disclosing private information, thus reinforcing that invasion of privacy is indeed the appropriate tort for the scenario presented.