!!! Overview
[{$pagename}] is defined in [RFC 6024] as "[{$pagename}] represents an [Authoritative Entity] via a [Public Key] and associated data".  

In [RFC 5934] states: "A trust anchor contains a [Public Key] that is used to validate [Digital Signatures]."

So it appears that it depends on [context].

[{$pagename}] may be referred to as [Sources of Authority] ([SoAs]), [Root Certificate], [Certificate Authority].
The [Public Key] is used to verify [Digital Signatures], and the associated data is used to constrain the types of information for which the [{$pagename}] is authoritative.  

A [Relying Party] uses [{$pagename}]s to determine if a digitally signed object is valid by verifying a [Digital Signature] using the [{$pagename}]'s [Public Key], and by enforcing the constraints expressed in the associated data for the [{$pagename}].

In [Cryptography] and computer security, a [{$pagename}] is either an unsigned [public Key] [certificate] or a [Self-signed Certificate] that identifies the [Certificate Authority] (CA).

[{$pagename}] is part of a [Public Key Infrastructure] scheme. 

The most common commercial variety is based on the ITU-T [X.509] standard, which normally includes a [Digital Signature] from a [Certificate Authority] (CA).

[{$pagename}] is commonly called a [Root Certificate].

[{$pagename}]s are kept within a [Trust Anchor Store] (or [Keystore])

[{$pagename}] when referring to Hardware and [Operating Systems] often use the term [Roots of Trust] ([RoT])

!! Only Local Significance
[{$pagename}]s have only local significance, i.e., each [Relying Party] is configured with a set of [{$pagename}]s, either by the [Relying Party] or by an [entity] that manages [{$pagename}]s in the [context] in which the [Relying Party] operates.

The associated data defines the scope of a [{$pagename}] by imposing constraints on the signatures that the [{$pagename}] may be used to verify.

Because one [Relying Party] says a [Subject Certificate] is a [Trusted Certificate] does not imply that the [Subject Certificate] is a [Trusted Certificate] to any other [Relying Party]

!! More Information
There might be more information for this subject on one of the following:
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