Multi-Factor Authentication System

 MultiFactor Authentication System - Technical & Engineering Guide

1. Introduction

1.1 Purpose

Explain objectives: enhance system security by requiring multiple authentication factors:
- Something you know (password/PIN)
- Something you have (smartphone, hardware token)
- Something you are (biometrics)

1.2 Scope

Define boundaries: MFA for user logins—web, mobile, admin—and integration with existing identity systems, such as Active Directory, OAuth2/SAML, or internal user databases.

1.3 Definitions & Acronyms

Acronym

Definition

MFA

Multi-Factor Authentication

TOTP

Time-based One-Time Password

OTP

One-Time Password

SMS

Short Message Service

SAML

Security Assertion Markup Language

PKI

Public Key Infrastructure

HSM

Hardware Security Module

2. Architecture Overview

Detailed sections covering system components, data flow, security, and fallback strategies.