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Computer Fraud and Abuse Act

1986 United States cybersecurity law

  • 16 min read
  • 6 chapters

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Through Computer security, Financial institution and Contract

The original 1984 bill was enacted in response to concern that computer-related crimes might go unpunished. The House Committee Report to the original computer crime bill included a statement by a representative of GTE-owned Telenet that characterized the 1983 techno-thriller film WarGames—in which a young teenager (played by Matthew Broderick) from Seattle breaks into a U.S. military supercomputer programmed to predict possible outcomes of nuclear war and unwittingly almost starts World War III—as "a realistic representation of the automatic dialing and access capabilities of the personal computer."

The CFAA was written to extend existing tort law to intangible property, while, in theory, limiting federal jurisdiction to cases "with a compelling federal interest—i.e., where computers of the federal government or certain financial institutions are involved or where the crime itself is interstate in nature", but its broad definitions have spilled over into contract law (see "Protected Computer", below). In addition to amending a number of the provisions in the original section 1030, the CFAA also criminalized additional computer-related acts. Provisions addressed the distribution of malicious code and denial-of-service attacks. Congress also included in the CFAA a provision criminalizing trafficking in passwords and similar items.

Since then, the Act has been amended a number of times—in 1989, 1994, 1996, in 2001 by the USA PATRIOT Act, 2002, and in 2008 by the Identity Theft Enforcement and Restitution Act. With each amendment of the law, the types of conduct that fell within its reach were extended. In 2015, President Barack Obama proposed expanding the CFAA and the RICO Act. DEF CON organizer and Cloudflare researcher Marc Rogers, Senator Ron Wyden, and Representative Zoe Lofgren stated opposition to this on the grounds it would make many regular internet activities illegal. In 2021, the Supreme Court ruled in Van Buren v. United States to provide a narrow interpretation of the meaning of "exceeds authorized access".

Protected computers

The only computers, in theory, covered by the CFAA are defined as "protected computers". They are defined under section 18 U.S.C. § 1030(e)(2) to mean a computer:

  • exclusively for the use of a financial institution or the United States Government, or any computer, when the conduct constituting the offense affects the computer's use by or for the financial institution or the government; or
  • which is used in or affecting interstate or foreign commerce or communication, including a computer located outside the United States that is used in a manner that affects interstate or foreign commerce or communication of the United States ...

In practice, any ordinary computer has come under the jurisdiction of the law, including cellphones, due to the interstate nature of most Internet communication.

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