Clifford Stoll

Clifford Stoll
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Name	Clifford Stoll
Birth date	1950-06-04
Birth place	New York City, New York, United States
Occupation	Astronomer, systems administrator, author, speaker
Alma mater	University of Rochester, University of Arizona
Known for	Tracking a computer intruder; The Cuckoo's Egg

Clifford Stoll is an American astronomer, systems administrator, author, and public speaker known for his role in tracking an international computer intruder in the 1980s and for writing the bestselling account of that investigation. He became prominent through his work at a major research laboratory and through a widely read book and appearances on television and radio. His story intersected with law enforcement, intelligence agencies, and academic computing communities during a formative period for network security.

Early life and education

Born in New York City, Stoll studied physics and astronomy at the University of Rochester, where he earned a Bachelor of Science degree, and completed graduate work at the University of Arizona in astronomy. During his doctoral studies he worked with observatories and research groups associated with institutions such as the Kitt Peak National Observatory, the National Optical Astronomy Observatory, and interacted with telescope projects connected to the Association of Universities for Research in Astronomy. His early academic network included contacts at the American Astronomical Society and collaborations with researchers involved in instrumentation and computational methods used at facilities like the Mount Graham International Observatory.

Career and research

Stoll began his professional career as a research scientist and systems administrator at the Lawrence Berkeley National Laboratory (LBNL), where he managed early networked computing systems and astronomical data-processing pipelines. His technical work involved hardware and software environments influenced by companies and projects such as Digital Equipment Corporation, the Unix community, and networking initiatives tied to the Advanced Research Projects Agency Network and NSFNET. In managing multiuser systems at LBNL and academic networks, he interfaced with colleagues from institutions including the Massachusetts Institute of Technology, Stanford University, and the University of California, Berkeley computing centers. His professional responsibilities brought him into operational contact with commercial vendors such as Hewlett-Packard, IBM, and Sun Microsystems, and with standards bodies like the Internet Engineering Task Force through early protocol work.

The Cuckoo's Egg and hacker investigation

In the mid-1980s Stoll detected a 75-cent accounting discrepancy on an LBNL system and launched an investigation that uncovered unauthorized access tracing to hosts in Europe and military and intelligence networks. His hands-on tracing and forensic logging led to interactions with agencies and organizations including the Federal Bureau of Investigation, the Central Intelligence Agency, the National Security Agency, and European law enforcement such as Kriminalpolizei elements and computer incident response teams associated with institutions like the European Organization for Nuclear Research. Stoll documented the multiyear pursuit of an intruder exploiting vulnerabilities in protocols and services used across networks connecting research centers like Lawrence Livermore National Laboratory, universities such as Princeton University, and commercial nodes operated by firms like CompuServe. The investigation illuminated security weaknesses in technologies from DEC VAX systems to early TCP/IP deployments and informed practices later adopted by groups including the CERT Coordination Center at Carnegie Mellon University.

Popular writing and public speaking

Stoll chronicled his investigation in the book The Cuckoo's Egg, which became a bestseller and brought attention from media outlets and institutions such as The New York Times, The Washington Post, Time, and television programs including 60 Minutes and Larry King Live. As an author and speaker he addressed audiences ranging from American universities and research labs to conferences organized by groups like DEF CON, Black Hat Briefings, and professional societies including the Association for Computing Machinery and the IEEE Computer Society. His commentary often intersected with debates involving figures and entities such as Bill Gates, Steve Jobs, Tim Berners-Lee, and policy settings influenced by lawmakers in the United States Congress and agencies like the National Science Foundation. Stoll's media presence further connected him with popular science outlets and broadcasts produced by organizations like National Public Radio and the BBC.

Later work and legacy

Following his investigative and writing prominence, Stoll pursued projects in science communication, education, and software development, collaborating with museums, planetaria, and educational initiatives associated with institutions like the Smithsonian Institution and the Planetary Society. His early warnings and public positions contributed to the evolution of incident response, risk assessment, and cybersecurity curricula adopted by universities including Carnegie Mellon University and Stanford University. The Cuckoo's Egg influenced later nonfiction works on cybercrime and policy by authors connected to publishers such as Simon & Schuster and HarperCollins, and informed narratives in documentaries and dramatizations produced by networks like PBS and Discovery Channel. Stoll's legacy is noted in histories of computing that cite developments at places like the Internet Archive and in retrospectives involving pioneers from AOL to Cisco Systems.

Personal life

Stoll has balanced public engagement with private pursuits in astronomy, birdwatching, and education, interacting with organizations such as the Audubon Society and amateur astronomy clubs affiliated with the International Astronomical Union. He has lived and worked in regions connected to major observatories and research centers in California and the Southwest United States, maintaining ties with academic mentors and collaborators from the University of Rochester and the University of Arizona communities. Category:American astronomers Category:Computer security specialists