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Intermediate10 min readSecurity

SAML

XML-based single-sign-on standards enabling enterprise user identity federations.

What you'll learn

  • Cryptographic Token Authentication
  • Transport Layer Protection
  • Strict Principle of Least Privilege

TL;DR

XML-based single-sign-on standards enabling enterprise user identity federations.

Visual System Topology

SAML Encrypted Access Flow

Client Agent Unencrypted Data
Encrypt
Security Gateway TLS / Token Valid
Decrypt
Secured Service Verified Payload

Concept Overview

SAML represents the set of standards, cryptographic algorithms, and authentication frameworks designed to secure network channels and verify agent identities. XML-based single-sign-on standards enabling enterprise user identity federations.

Security is a fundamental system design pillar. An architectural design is only as strong as its weakest link; unprotected APIs, unencrypted databases, and loosely configured service accounts are primary targets for malicious actors. Implementing robust transport encryptions, cryptographic authentication protocols, and strict access controls prevents data leaks and protects critical customer transactions.

Key Architectural Pillars

1

Cryptographic Token Authentication

Verifying identity claims via digitally signed, tamper-proof state packets like JSON Web Tokens (JWT).

Example: HMAC or RSA signature checks.
2

Transport Layer Protection

Enforcing end-to-end socket encryptions (TLS/SSL) to block Man-in-the-Middle eavesdropping and data packet tampering.

3

Strict Principle of Least Privilege

Isolating internal microservice bounds with secure API scopes, keys, and role-based policies (RBAC).

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SAML - Module 8: Security | System Design | Revise Algo