Anticounterfeiting Act of 2004

Anticounterfeiting Act of 2004 - Amends the Federal criminal code to prohibit trafficking in an "illicit authentication feature." Defines that term to mean an authentication feature that: (1) without the authorization of the respective copyright owner, has been tampered with or altered so as to facilitate the reproduction or distribution of a phono-record, a copy of a computer program, a copy of a motion picture or other audiovisual work, or documentation or packaging, in violation of the rights of the copyright owner; (2) is genuine, but has been distributed, or is intended for distribution, without the authorization of the respective copyright owner; or (3) appears to be genuine but is not.

Authorizes a copyright owner who is injured by a violation of this Act or is threatened with injury to bring a civil action in an appropriate U.S. district court. Sets forth remedies for violations.