Chain of Trust
Definition
A chain of trust connects successive verifications of identity or authorization.
A sequence of cryptographically or organizationally linked verifications, where each stage authenticates or authorizes the next.
Simply explained
As with a series of controls, each verified station confirms the next. Thus, trust extends from a starting point onward.
Why it matters in practice
The term contributes to secure, maintainable, and high-performance web applications as well as resilient technical decisions.
Example from business
A device verifies firmware signatures from the hardware root of trust up to the application.
Limits and pitfalls
- A compromised root or faulty validation breaks the chain; revocation and time checks are required.
Origin & history
PKI and Secure Boot established chains of trust from a protected root to certificates or software.
Use in mid-sized companies
- Possible example: A device verifies firmware signatures from the hardware root of trust up to the application.
Frequently asked questions
What does chain of trust mean?
A sequence of cryptographically or organizationally linked verifications, where each stage authenticates or authorizes the next. What should you pay attention to? A compromised root or faulty validation breaks the chain; revocation and time checks are required.
Sources
- NIST SP 800-193 · NIST SP 800-193
Source checked on 10.10.2026. Editorial application examples are hypothetical; no evidence of real customer results.
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