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Peter G. Neumann, a pioneering computer-security researcher and Multics community leader long associated with SRI International, has died following complications from a recent fall and surgery. Celebrated for decades of influential writing on system reliability, safety, risk analysis and secure design, Neumann shaped thinking on dependable and trustworthy computing. Colleagues including Tom Van Vleck and Robert Watson announced his passing to the Multicians community; SRI plans a memorial in Menlo Park. An accomplished musician as well as engineer, Neumann’s work and mentorship left a lasting legacy among researchers, practitioners and historians of computer systems and cybersecurity.
Peter Neumann was a foundational voice in secure, dependable system design whose ideas influenced generations of researchers and practitioners. His death marks the loss of a key mentor and historical link for those studying system reliability, safety, and trusted computing.
Dossier last updated: 2026-05-19 07:02:12
Veteran computer-security researcher Peter G. Neumann has died in his sleep at a Santa Clara hospital from complications following a recent fall and surgery, his daughter and colleagues reported. Neumann, long associated with SRI International and known for his work on dependable computing, risk analysis, and security policy, was also an accomplished musician. Colleagues including Robert Watson and Tom Van Vleck circulated the notice to historic systems and Multics communities; SRI is expected to host a memorial in Menlo Park. Neumann’s SRI page (csl.sri.com/~neumann/) and decades of stewardship in safety and security make his passing notable for the tech community focused on trustworthy systems.
Peter Neumann, a long-time computer security researcher and influential member of the computing community, died in his sleep at a Santa Clara hospital from complications following a fall and surgery. His daughter Hellie was with him; a memorial service is expected to be hosted by SRI in Menlo Park. Neumann was known for his work at SRI and contributions to computer security, reliability, and the Multics community; his SRI home page is https://www.csl.sri.com/~neumann/. Colleagues including Tom Van Vleck and Robert Watson circulated the notice to archival and Multics lists. The loss is significant to the legacy and historical communities that shaped early computing and system safety thinking.
Veteran computer-security researcher and Multics pioneer Peter G. Neumann has died in his sleep following complications from a recent fall and surgery, his daughter and colleagues confirmed. Neumann, long affiliated with SRI International and known for work on computer reliability, safety and security, was also a musician and accomplished instrumentalist. Colleagues including Tom Van Vleck and Robert Watson relayed the news to the Multicians community; SRI is expected to host a memorial in Menlo Park. Neumann’s SRI home page and decades of writing influenced thinking on dependable systems, risk analysis, and security policy, making his passing significant to historians and practitioners in computer systems and cybersecurity.
Veteran computer scientist Peter G. Neumann has died in his sleep at a Santa Clara hospital following complications from a recent fall and surgery, his daughter and colleagues confirmed. Neumann, long associated with SRI and known for his work on computer security, reliability, and the Multics community, was also an accomplished musician. Colleagues including Tom Van Vleck and Robert Watson shared the news with the Multicians mailing list; SRI is expected to host a memorial in Menlo Park. Neumann’s SRI page and decades of writings influenced thinking on system safety, secure design, and trustworthy computing, making his death notable to researchers, engineers, and the broader computing community.