Principle of Least Privilege - History

History

The original formulation is from Jerome Saltzer:

Every program and every privileged user of the system should operate using the least amount of privilege necessary to complete the job. —

Peter J. Denning, in his paper "Fault Tolerant Operating Systems", set it in a broader perspective among four fundamental principles of fault tolerance.

Dynamic assignments of privileges was earlier discussed by Roger Needham in 1972.

Historically, the oldest instance of least privilege is probably the source code of login.c, which begins execution with super-user permissions and—the instant they are no longer necessary—dismisses them via setuid with a non-zero argument.

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