Published Works

Books by
Santhosh Sivarajan

From student guides on computer science and cybersecurity to professional references on identity management and Windows Server security. Written by a Microsoft MVP with 30+ years of practitioner experience.

Student Guides
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Student Guide
Computer Fundamentals & Terminology
Santhosh Sivarajan

Computer Fundamentals & Terminology

A Student Guide to Computers, IT, Cybersecurity, and Artificial Intelligence
Author: Santhosh SivarajanFormat: Paperback & KindleAudience: Students & Beginners

A comprehensive, beginner-friendly guide that takes students from the very basics of how computers work through modern IT infrastructure, cybersecurity principles, and artificial intelligence. Designed as a foundational text for anyone entering the technology field — no prior experience required.

What You'll Learn

  • Computer hardware and software fundamentals — CPU, memory, storage, operating systems
  • Networking basics — LAN, WAN, protocols, IP addressing, DNS, DHCP
  • Introduction to cybersecurity — threats, malware, encryption, access control
  • Cloud computing concepts — IaaS, PaaS, SaaS, public vs. private cloud
  • Artificial Intelligence and Machine Learning fundamentals
  • IT career paths and industry certifications
  • Essential IT terminology and vocabulary with clear definitions

Who This Book Is For

High school and college students exploring technology, career changers entering IT, educators building curriculum, and anyone who wants a solid foundation in how modern technology works — explained in plain language with real-world examples.

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Student Guide
Cybersecurity Fundamentals & Terminology
Santhosh Sivarajan

Cybersecurity Fundamentals & Terminology

A Student Guide to Digital Safety, Defense, and Cyber Careers
Author: Santhosh SivarajanFormat: Paperback & KindleAudience: Students & Career Starters

A focused guide to the world of cybersecurity — from the foundational principles of digital safety to the skills and knowledge needed to pursue a career in cyber defense. Covers both the technical and human dimensions of security, written for students with no assumed background.

What You'll Learn

  • Cybersecurity fundamentals — CIA triad, defense-in-depth, Zero Trust model
  • Threat landscape — malware types, phishing, social engineering, ransomware
  • Network security — firewalls, IDS/IPS, VPNs, segmentation
  • Identity and access management — authentication, MFA, RBAC, least privilege
  • Cryptography basics — symmetric vs. asymmetric, hashing, digital certificates
  • Incident response and digital forensics introduction
  • Cybersecurity career paths — SOC analyst, penetration tester, security engineer
  • Compliance and governance — NIST, ISO 27001, HIPAA, GDPR overview

Who This Book Is For

Students interested in cybersecurity careers, IT professionals looking to transition into security, and educators developing cybersecurity curriculum. Pairs perfectly with SAG Academy's Foundations of Cybersecurity course.

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Student Guide
Data Science Fundamentals & Terminology
Santhosh Sivarajan

Data Science Fundamentals & Terminology

A Student Guide to Analytics, Statistics, Python, SQL, and Data Storytelling
Author: Santhosh SivarajanFormat: Paperback & KindleAudience: Students & Analysts

A practical introduction to the world of data science — covering the tools, techniques, and thinking needed to work with data. From basic statistics to Python programming, SQL queries, and the art of communicating insights through data storytelling.

What You'll Learn

  • Data science foundations — what data scientists do, the data lifecycle
  • Statistics essentials — mean, median, standard deviation, probability, distributions
  • Python for data science — pandas, NumPy, matplotlib, basic scripting
  • SQL fundamentals — queries, joins, aggregations, database concepts
  • Data visualization — charts, dashboards, choosing the right visual
  • Data storytelling — turning analysis into actionable business insights
  • Machine learning introduction — supervised vs. unsupervised, use cases

Who This Book Is For

Students interested in data analytics careers, business professionals wanting to become more data-literate, and anyone curious about how data science is transforming industries. No prior coding experience required.

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Professional & Advanced
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Professional
From Seals to Software Agents
Santhosh Sivarajan

From Seals to Software Agents

The Evolution, Architecture, and Future of Identity and Access Management
Author: Santhosh SivarajanFormat: Paperback & KindleAudience: IT Professionals & Architects

A comprehensive exploration of Identity and Access Management from its historical origins to its modern enterprise implementations and future directions. This book traces the journey from physical seals and wax stamps used for authentication thousands of years ago, through the evolution of digital identity, to today's AI-driven software agents and Zero Trust architectures.

What You'll Learn

  • The history of identity — from ancient seals and signet rings to digital certificates
  • Modern IAM architecture — directories, federation, SSO, OAuth, OIDC, SAML
  • Active Directory and Entra ID — design, security, and hybrid identity
  • Privileged Access Management — tiered administration, just-in-time access
  • Zero Trust identity — Conditional Access, continuous verification, device trust
  • Identity governance — lifecycle management, access reviews, compliance
  • The future of IAM — AI agents, decentralized identity, passwordless authentication

Who This Book Is For

Identity architects, security engineers, IT managers evaluating IAM platforms, and anyone who wants to understand how identity became the new security perimeter — and where it's going next. Written with the depth of a practitioner who has designed and implemented enterprise IAM solutions for over three decades.

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Professional
Getting Started with Windows Server Security
Santhosh Sivarajan

Getting Started with Windows Server Security

Windows Server Security Essentials — Packt Publishing
Author: Santhosh SivarajanPublisher: Packt PublishingPages: ~240Audience: Server Administrators

A hands-on guide to securing Windows Server environments using native tools, industry best practices, and advanced security techniques. Covers the full spectrum of Windows Server security — from initial hardening to Active Directory protection, Hyper-V security, and application role defense.

What You'll Learn

  • Designing secure Windows Server platforms following best practices
  • AppLocker, BitLocker, and EMET for mitigating security risks
  • Active Directory security — Group Policy, delegation, privileged access
  • Hyper-V security — virtual machine isolation and fabric protection
  • IIS server hardening and web application security
  • Security monitoring, auditing, and incident response on Windows Server

Who This Book Is For

Security administrators and IT professionals managing Windows Server environments. Ideal for those with foundational Windows Server knowledge looking to harden their infrastructure against modern threats.

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Professional
Instant Migration: Windows Server 2008 to 2012
Santhosh Sivarajan

Instant Migration from Windows Server 2008 and 2008 R2 to 2012 How-to

A step-by-step guide to installing, configuring, and updating to Windows Server 2012 — Packt Publishing
Author: Santhosh SivarajanPublisher: Packt PublishingPages: ~130Audience: Server Administrators

A practical, field-tested migration guide that walks you through the entire process of moving from Windows Server 2008/2008 R2 to Windows Server 2012. Based on the author's own real-world migration experiences, this book covers planning, installation, configuration, service migration, and decommissioning in clear, step-by-step instructions.

What You'll Learn

  • Installing and configuring Windows Server 2012 from scratch
  • Active Directory migration — domain controllers, DNS, DHCP
  • Print server migration and Remote Desktop Services setup
  • Hyper-V migration — moving virtual machines between server versions
  • Decommissioning old servers safely and completely
  • Troubleshooting common migration issues with real-world solutions

Who This Book Is For

Windows Server administrators performing infrastructure migrations. While focused on the 2008-to-2012 transition, the methodology, planning approach, and troubleshooting techniques remain applicable to any Windows Server version upgrade.

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About the Author

Santhosh Sivarajan is a Microsoft Most Valuable Professional (MVP) with over 30 years of experience in enterprise IT, identity and access management, and cybersecurity. He holds a Master's degree in Computer Information Systems from the University of Houston, Texas, and has designed and implemented enterprise solutions for organizations across industries. He is the founder of SAG Business Group, where he leads advisory, education, and community programs that help organizations and individuals navigate the evolving technology landscape.