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Security by Design: Building Secure Digital Systems

A Practical Foundation for Secure Architecture, Cybersecurity, Privacy, AI Security & Digital Defense

Security by Design: Building Secure Digital Systems
Mohammad Kamrul Hassan

Security is no longer something you add after a system is built. It must be designed from the beginning.

Security by Design explores how modern digital systems can be built to reduce risk, limit unauthorized access, protect sensitive data, detect threats, contain failures, and recover from attacks.

From secure architecture and cybersecurity foundations to privacy, cloud security, DevSecOps, AI security, and digital resilience, this book provides a practical foundation for building systems that remain secure in an increasingly connected and AI-powered world.

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About the Book

Security by Design: Building Secure Digital Systems is a practical and foundational guide to designing, building, operating, and governing secure digital systems.

The book presents security as an engineering and architectural discipline rather than a collection of isolated security tools.

It explores the foundations of cybersecurity, threat modeling, secure architecture, identity and access control, application and API security, data protection and privacy, cloud and infrastructure security, secure software development, DevSecOps, AI security, security monitoring, incident response, resilience, and security governance.

Particular attention is given to modern AI-powered systems and the security challenges created when AI interacts with sensitive data, applications, tools, APIs, and automated workflows.

Rather than focusing primarily on temporary technologies or product-specific techniques, the book emphasizes principles that can remain useful as technology evolves.

It is designed to help readers develop the ability to ask the right security questions before systems are built, while they are being developed, and throughout their operational lifecycle.

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Artificial IntelligenceSoftware EngineeringSecurity EngineeringNetworking

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Mohammad Kamrul Hassan

Mohammad Kamrul Hassan is an IT engineer, tech consultant, and writer specializing in global politics, information technology, and travel. A former student of Voronezh State University, Russia, he currently works as an IT engineer for a UK-based international organization and collaborates with several global technology firms. Driven by a lifelong passion for international socio-political realities and long-distance travel, his writing seamlessly blends technical depth with rich, analytical global storytelling.

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Protect Earth

Protect Earth

https://protect.earth
We plant trees, wildflowers, and remove invasives to tackle the climate/biodiversity crises, and literally everyone can get involved! Registered charity 1192453
Protect Earth create, restores, and protects woodlands all over the UK. We plant tens of thousands of trees every year on low quality farmland, schools, wedding venues, council land, road verges, golf courses, or anywhere else that makes sense. Increasingly Protect Earth is securing its own land, restoring an ancient temporate rainforest in Cornwall, and creating a brand new temperate rainforest in Wales.

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