18 U.S. Code § 1030.Fraud and related activity in connection with computers

This code is meant to protect data that is sensitive for national defense or foreign relations reasons from unauthorized access, use, and distribution. This data includes financial information, anything from a US department or agency, and anything from a “protected computer.” It also covers ransomware, and knowingly damaging a “protected computer” by transmitting “a program, information, code, or command,”
An especially interesting part of this is the definition of “protected computer.” Its definition includes financial institution computers, US Government computers, and any computer, whether or not it is in the US, that is used to affect trade or communication between US states or the US and foreign countries. Under this, the US could consider the laptop of a foreign student video conferencing with a US college to be a protected computer and therefore US law would be enforceable on that device.