Computer Trespass Act of 1984

Counterfeit Access Device and Computer Fraud and Abuse Act of 1984 - Amends the Federal criminal code to make it a criminal offense to knowingly and with intent to defraud: (1) produce or traffic in counterfeit credit cards or other account access devices; and (2) traffic in one or more unauthorized credit cards or other access devices within one year and by such conduct obtain anything of value aggregating $1,000; (3) possess 15 or more counterfeit or unauthorized access devices; or (4) produce, traffic in, or possess access device-making equipment.

Makes it an offense to attempt to commit or to be a party to a conspiracy to commit such an offense.

Increases the penalty for subsequent offenses.

Provides an additional offense of using a computer without authorization or using a computer with authorization for unauthorized purposes with the intent to execute a scheme to defraud, if such conduct obtains: (1) anything of value aggregating $5,000 or more during any year; or (2) classified information.

Prohibits the unauthorized use of a computer when such conduct modifies or discloses information or prevents the use of such computer: (1) if the offense affects interstate or foreign commerce and the offender creates a loss to another of a value of $5,000 or more during any one year; or (2) if the computer is operated on behalf of the U.S. Government.

Makes it an offense to attempt to commit or to be a party to a conspiracy to commit such an offense.

Increases the penalty for subsequent offenses.

Grants authority to the U.S. Secret Service to investigate offenses under this Act.

Requires the Attorney General to report annually to Congress about prosecutions under this Act during the first three years after its enactment.