With the increasing adoption of cloud-based services, businesses rely heavily on Integration Platform as a Service (iPaaS) solutions to connect diverse applications efficiently, departing from the traditional integration techniques. While iPaaS enhances operational agility and scalability, it may also introduce significant security concerns, such as exposing a greater attack surface, more complex access control, and advanced management of security practices over several systems, services, and users.

This thesis aims to identify the primary security challenges associated with iPaaS integration, analyse methods for mitigating these risks, and evaluate the benefits that continue to drive organisations toward adopting iPaaS solutions, despite potential vulnerabilities. Specifically, it focuses on access control mechanisms, cryptographic practices, and policy management within iPaaS environments, where best practices can be established, showcasing good security throughout the iPaaS platform.

To achieve these objectives, a combination of literature review and observation analysis was used. The literature review provided insights into existing security measures and highlighted gaps in current practices by studying existing works regarding the topic. Observation analysis was conducted to assess real-world implementations and validate findings deriving out of the theoretical research, as well as voices from the real world regarding both custom integration and iPaaS integration.

The study reveals that while iPaaS platforms offer substantial benefits in terms of system integration and cost efficiency, the lack of robust security measures can lead to vulnerabilities. However, adopting best practices such as strong access control methods, which include role-based access control (RBAC), attribute-based access control (ABAC), comprehensive cryptographic strategies, and continuous policy enforcement can significantly reduce these risks, allowing a heap of benefits for further continued and secure adoption.

In conclusion, the research provides actionable recommendations for organisations to secure their iPaaS-based systems while maximising the advantages of seamless application integration.