Identifier

Definition

Attribute that can be used to distinguish a Digital Identity.

Notes

By definition identifier can be one or more than one attributes, if the identifier is one attribute then that attribute must be unique, and is thus a unique-identifier. When multiple attributes are used, they are referred to as identifying-attribute.

Sources

ITU-T X.1252

Status

MC Approved The current definition was added to the glossary on 12/10 following consensus approval at the AHG Meeting on 2013-12-05.

Problems

• Many identifiers include a pointer to an Authentication servers, for example bill@gmail.com.
• Other identifiers are just random numbers, like GUIDs.
• In all cases, if the identifier is known to an attacker, they can attempt to take ownership of that identifier, which is (unfortunately) known as Identity Theft.

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