Operation Sundevil was a 1990 nationwide United States Secret Service crackdown on "illegal computer hacking activities." It involved raids in approximately fifteen different cities and resulted in three arrests and the confiscation of computers, the contents of electronic bulletin board systems (BBSes), and floppy disks. It was revealed in a press release on May 9, 1990. The arrests and subsequent court cases resulted in the creation of the Electronic Frontier Foundation. The operation is now seen as largely a public-relations stunt. Operation Sundevil has also been viewed as one of the preliminary attacks on the Legion of Doom and similar hacking groups. The raid on Steve Jackson Games, which led to the court case Steve Jackson Games, Inc. v. United States Secret Service, is often attributed to Operation Sundevil, but the Electronic Frontier Foundation states that it is unrelated and cites this attribution as a media error.
The name comes from the Sundevil football stadium of Arizona State University, near the local Secret Service headquarters from where the investigation and raids were coordinated.
Prior to 1990, people who manipulated telecommunication systems, known as phreakers, were generally not prosecuted within the United States. The majority of phreakers used software to obtain calling card numbers and built simple tone devices in order to make free telephone calls. A small elite, highly technical segment of phreakers were more interested in information about the inner workings of the telecommunication system than in making free phone calls. Phone companies complained of financial losses from phreaking activities. The switch from analog to digital equipment began to expose more of the inner workings of telephone companies as hackers began to explore the inner workings, switches and trunks. Due to a lack of laws and expertise on the part of American law enforcement, few cases against hackers were prosecuted until Operation Sundevil.