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Digital Identity

Authentication

Authentication Authorization Single Sign‑On (SSO) Identity Provider (IdP)

Set of attributes, identifiers, and credentials used to represent a subject in digital systems.

Definition

Digital identity includes identifiers (user IDs), attributes (name, email, roles), and credentials used for authentication and authorization. Design affects privacy through linkability and federation.

In plain English Set of attributes, identifiers, and credentials used to represent a subject in digital systems.

Why this matters

Why it matters: Centralized identity can create tracking and single-point compromise risk; privacy-aware identity limits correlation and shares minimal attributes.

Example

Example: Share “over 18” instead of full birthdate; avoid unnecessary cross-service linking.