Expired50% confidenceFactExact time
The whitelist security principle of "deny by default, allow explicitly" was first proposed by security expert Marcus Ranum in the 1990s and later became a fundamental guideline in areas such as firewall design, operating system permission management, and application sandboxing.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
Claude Code Permission Management Fully Explained: Configure It Right Before You Trust It
bilibilionedayhigh6/13/2026
Related Claims
UnverifiedThe 'default deny, explicit allow' security principle was first articulated by security expert Marcus Ranum in the 1990s.75% similarUnverifiedThe principle of least privilege originated in computer security theory in the 1970s, was proposed by Jerome Saltzer at MIT, and was later incorporated into the U.S. Department of Defense Trusted Computer System Evaluation Criteria (TCSEC).59% similarUnverified最小权限原则最早由美国国防部在1970年代的安全模型中提出59% similarUnverifiedThe principle of least privilege originated from the operating system security research of Jerome Saltzer and Michael Schroeder in the 1970s and was later incorporated into the core principles of the NIST Cybersecurity Framework.58% similarUnverifiedSaltzer and Schroeder proposed the "deny by default" security principle in 197558% similar
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