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Identity, Access, and Auth ​

Identity, Access, and Auth Graphics Coverage ​

Primary chapter graphic: Authentication State Options, Identity Mechanisms Map, Tokens vs API Keys, JWT Stateless Authentication, JWT vs PASETO, REST API Authentication Methods, JWT Stateless Authentication, JWT Box Model, Access Control Models, Single Sign-On Authentication Flow, Single Sign-On Authentication Flow, Two-Factor Authentication Flow. Accepted graphics: 12. Reviewed non-signal pages: 6. Open graphics in review: 0. QA status lives in graphics audit and visual review ledger.

Corpus pages: p. 2, p. 5, p. 26-27, p. 36-37, p. 51-52, p. 94, p. 104-105, p. 117, p. 156-157, p. 163, p. 166-167, p. 179, p. 236-237, p. 269, p. 282-283, p. 324-325, p. 404 Coverage: 26 pages; low-confidence extraction ranges: p. 2, p. 5, p. 324-325

This chapter is part of Marius's owned architecture build corpus. The text routes decisions; durable implementation signal is carried by accepted graphics, reviewed non-signal decisions, and the linked QA audit.

Chapter Visuals ​

Accepted graphics carry the canonical design signal for this chapter. Each selected source page is either accepted as a graphic or explicitly marked non-signal in the source-faithful ledger. Review and QA state live in visual inventory, visual review ledger, and graphics audit.

Authentication State Options ​

Authentication State Options

Identity Mechanisms Map ​

Identity Mechanisms Map

Tokens vs API Keys ​

Tokens vs API Keys

JWT Stateless Authentication ​

JWT Stateless Authentication

JWT vs PASETO ​

JWT vs PASETO

JWT Stateless Authentication ​

JWT Stateless Authentication

REST API Authentication Methods ​

REST API Authentication Methods

JWT Box Model ​

JWT Box Model

Single Sign-On Authentication Flow ​

Single Sign-On Authentication Flow

Access Control Models ​

Access Control Models

Single Sign-On Authentication Flow ​

Single Sign-On Authentication Flow

Two-Factor Authentication Flow ​

Two-Factor Authentication Flow

Open Review Queue ​

  • none

Reviewed Non-Signal Pages ​

  • Identity, Access, And Auth: Authentication + Session Map: source p. 2; batch 01; status non-signal/reviewed; ledger reason in visual-review-ledger.json
  • Identity, Access, And Auth: API Gateway + Authentication Map: source p. 5; batch 01; status non-signal/reviewed; ledger reason in visual-review-ledger.json
  • Identity, Access, And Auth: Rate Limiting + Authentication Map: source p. 163; batch 01; status non-signal/reviewed; ledger reason in visual-review-ledger.json
  • Identity, Access, And Auth: API Gateway + JWT Map: source p. 237; batch 07; status non-signal/reviewed; ledger reason in visual-review-ledger.json
  • Identity, Access, And Auth: API Gateway + Authentication Map: source p. 117; batch 09; status non-signal/reviewed; ledger reason in visual-review-ledger.json
  • Identity, Access, And Auth: TLS + Topic Map: source p. 179; batch 14; status non-signal/reviewed; ledger reason in visual-review-ledger.json

Use When ​

  • A human, service, webhook, or automation needs provable identity and bounded permission.

Avoid When ​

  • A prototype can run against fixtures without real credentials.

Core Model ​

  • Authentication proves the caller. Authorization decides whether that caller can act on the resource.
  • Prefer explicit ownership over accidental coupling. Every boundary should say who owns correctness, cost, data, recovery, and change.
  • Use corpus page pointers for inspection, and keep the chapter notes focused on reusable design decisions.

Implementation Guidance ​

  • Name principals, scopes, token lifetime, revocation path, tenant boundary, and audit events before production.
  • Write the smallest useful design note: purpose, inputs, outputs, state, failure behavior, observability, and rollback.
  • Choose the first implementation that can be tested against the real workflow without hiding a known production risk.

Tradeoffs ​

  • Stateless tokens scale well, while server-side sessions simplify revocation.
  • Centralization reduces duplicated work but can become a bottleneck when every team needs exceptions.
  • Specialized infrastructure helps at scale, but it must earn its operational cost.

Failure Modes ​

  • Tenant or role input is trusted from the client instead of checked at the resource boundary.
  • The diagram shows boxes but not ownership, retry behavior, data freshness, or user-visible failure.
  • The system has no proof path for the highest-risk assumption.

Decision Checklist ​

  • Test revoked tokens, expired sessions, cross-tenant reads, replayed webhooks, and least-privilege scopes.
  • Name the owner, source of truth, timeout, retry policy, and evidence that the path works.
  • Add one regression check for the failure mode most likely to recur.

Neutral Automation Examples ​

  • An internal approval tool separates read-only reviewers from operators allowed to trigger external actions.
  • A neutral internal automation starts with fixtures, then adds credentials, permissions, and production scheduling only after the boundary is tested.
  • A customer-facing workflow keeps irreversible actions behind explicit approval until metrics show it is safe to automate further.