Radish, Keep Going!
Radish, Keep Going!
Mar 3, 2026 · Information Security

Who Controls Your Computer’s Clock? Inside the Hidden NTP Trust Chain

Your device’s time comes from a worldwide hierarchy of atomic clocks and GPS satellites managed by the US Naval Observatory, but the NTP protocol lacks authentication, exposing SSL certificates, financial transactions, Kerberos authentication, and distributed databases to serious clock‑drift attacks.

NTPUSNOclock drift
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Who Controls Your Computer’s Clock? Inside the Hidden NTP Trust Chain