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More increasingly becoming the mainstream development approach to ensure security and privacy of software systems. In this approach, security is built in the system from the ground up and starts with a robust architecture design. Security architectural design decisions are often based on well-known security tactics, and patterns defined as reusable techniques for achieving specific quality concerns. Security tactics/patterns provide solutions for enforcing the necessary authentication, authorization, confidentiality, data integrity, privacy, accountability, availability, safety and non-repudiation requirements, even when the system is under attack. In order to ensure the security of a software system, not only it is important to design a robust security architecture (intended) but also it is necessary to preserve the (implemented) architecture during software evolution. 

Secure by design is the inclusion of security design principles, technology, and governance at every stage of the IoT journey. When an organization looks at creating, deploying, and leveraging connected technology to drive its business, security must be integrated into every component, tier, and application to preserve the integrity of the IoT solution and minimize the risk of cyber threats.

Developing IoT solutions around a standard platform allows organizations to develop security solutions for IoT devices in a consistent manner. In contrast, when organizations develop IoT platforms from scratch it can unknowingly increase the potential for cyber-related risks. IoT platforms typically include standard tools and methods that can promote good design habits and help developers build strong security into their solutions from the outset.

In addition, IoT platforms are commonly designed and tested holistically to validate that there is a high level of security deployed at every level, not only within individual components but also for all components working together as a whole.