Here's the summary for the wikipedia article you mentioned in your comment:

The Computer Fraud and Abuse Act of 1986 (CFAA) is a United States cybersecurity bill that was enacted in 1986 as an amendment to existing computer fraud law (18 U. S. C. § 1030), which had been included in the Comprehensive Crime Control Act of 1984. Prior to computer-specific criminal laws, computer crimes were prosecuted as mail and wire fraud, but the applying law was often insufficient.

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