Question

Difficulty: HardIdentity and Access Management Architecture

An enterprise security architect is designing an Identity and Access Management (IAM) framework to integrate a newly acquired subsidiary into the organization's cloud identity infrastructure. The solution must provide cross-domain web-based federated Single Sign-On (SSO) for web applications, automate real-time user identity lifecycle provisioning and deprovisioning between the Identity Provider (IdP) and third-party SaaS platforms, and align strictly with Zero Trust architecture principles. Which of the following architectural standards and protocols should the architect deploy to fulfill these requirements? (Select TWO).

  1. Security Assertion Markup Language (SAML) 2.0 to enable cross-domain web browser federated authenticationAnswer
  2. System for Cross-domain Identity Management (SCIM) 2.0 to automate user account lifecycle provisioning and synchronization across platformsAnswer
  3. C
    Remote Authentication Dial-In User Service (RADIUS) combined with static IPsec tunnels to establish implicit trust for all internal network segments
  4. D
    OAuth 2.0 access tokens formatted as simple authorization credentials to serve directly as user identity authentication assertions for web browser sessions

Answer

The architect must deploy Security Assertion Markup Language (SAML) 2.0 for federated web Single Sign-On and System for Cross-domain Identity Management (SCIM) 2.0 for automated user account lifecycle provisioning.
To achieve modern, secure IAM architecture in a hybrid Zero Trust enterprise, SAML 2.0 provides standard XML-based security assertions for cross-domain web federated authentication. Simultaneously, SCIM 2.0 provides an open RESTful specification specifically tailored to streamline and automate identity lifecycle management (provisioning, updates, and offboarding) across disparate cloud application ecosystems.

Step-by-Step Solution

1
Analyze the web federated Single Sign-On requirement
Identify SAML 2.0 (or OIDC) as the standard protocol for cross-domain web application authentication federations.
SAML 2.0 passes security assertions containing authentication state between the Identity Provider and Service Provider.
2
Analyze the automated account lifecycle provisioning requirement
Identify SCIM 2.0 as the open standard REST API protocol for identity provisioning.
SCIM standardizes schema objects and endpoints to automate creating, updating, and deprovisioning user profiles across cloud service boundaries.
3
Evaluate the remaining options against Zero Trust principles and AAA fundamentals
Reject legacy network perimeter trust controls (RADIUS over IPsec) and misuse of authorization frameworks (OAuth 2.0 without identity layers).
Zero Trust rejects implicit network-level trust, and OAuth 2.0 handles access authorization rather than identity authentication.

Key Concept

Identity Federation Protocols (SAML/OIDC) and Automated Identity Provisioning Standards (SCIM)
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