In today’s increasingly interconnected and automated world, network cybersecurity has become more complex than ever before. The proliferation of application programming interfaces (APIs) has contributed to this complexity, with their numbers growing rapidly each year. However, along with this growth, the number of exposures and vulnerabilities associated with APIs has also increased. To protect themselves from potential breaches, businesses must understand and implement a well-rounded approach to API security.

While it may not be an easy feat, there are key steps organizations can take to ensure the robustness of their API security measures.

Understanding APIs

Organizations need to know what assets they have before they can include them in any security program, and APIs are no exception. The first step toward bolstering API security is for businesses to have a comprehensive understanding of what APIs they have, how many, and what they do. They can then identify potential weak points and assess the security risks associated with each API.

This understanding enables businesses to prioritize their security efforts and allocate resources effectively. Steps businesses can take to ensure they have a complete understanding of their APIs include conducting thorough inventory checks, engaging in API discovery and mapping exercises, and implementing robust asset management practices.

Layering Security Solutions

Recognizing that relying on a single security solution is insufficient to protect against API exposures is another vital step. Instead, organizations should adopt a layered security approach which combines multiple solutions for a more comprehensive analysis. Layering security solutions can include implementing robust authentication mechanisms, encryption protocols, access controls, and intrusion detection systems. By implementing multiple layers of security, businesses can create a more resilient and fortified API ecosystem.

Keeping Documentation of APIs

Maintaining up-to-date documentation of APIs is still an often-overlooked aspect of security, yet it plays a significant role. Proper documentation helps organizations keep track of their APIs, their functionalities, and any associated security requirements. It serves as a resource for developers, administrators, and security teams to understand the purpose and potential vulnerabilities of each API. Businesses should establish clear guidelines and processes for documenting APIs, including version control, access restrictions, and regular updates.

Fortunately, this no longer needs to be a laborious task. To build integrations with a system, developers must know what an API can and can’t do. As a result, most organizations likely already have this documentation. If they don’t, tools are available to autogenerate documentation for API endpoints, saving developers time while simultaneously increasing security.

Maintaining a Holistic View when Active Scanning

When actively scanning for vulnerabilities and exposures, it is essential to adopt a holistic view which considers the entire API ecosystem. This approach goes beyond scanning individual APIs in isolation and encompasses the interconnected systems, dependencies, and integrations that APIs rely on. By considering the broader context, organizations can identify potential security gaps arising from API interactions and dependencies with other components. Factors that need to be considered during scanning include the underlying infrastructure, third-party integrations, and the potential impact of API vulnerabilities on overall system security.

Understanding the Need for Continuous Security

Achieving robust API security is an ongoing effort which requires organizations to maintain continuous security measures. Hackers and cybercriminals continuously evolve their tactics, making it crucial for businesses to remain vigilant and adapt to emerging threats. Additionally, APIs and their associated environments change frequently. When this happens, the results from an assessment one year ago are likely no longer valid.

Regular security assessments, vulnerability scanning, and penetration testing are essential components of a continuous security strategy. Organizations should also establish incident response plans and conduct regular security awareness training to ensure employees are equipped to identify and respond to potential security incidents effectively.

In today’s interconnected digital landscape, strong API security is key for businesses seeking to protect their valuable assets and maintain the trust of their customers. By understanding the complexities of network cybersecurity in the age of automation and following the key steps outlined above, organizations can significantly enhance their API security posture. It is crucial to emphasize securing APIs is not an isolated endeavor but an integral part of a well-rounded security program. With the availability of API scanning tools and a commitment to continuous, comprehensive security practices, businesses can mitigate the risks associated with API exposures and build a robust security foundation for their digital ecosystems.


Andy Hornegold

Andy Hornegold has a long career in cybersecurity, including a decade in threat simulation and consulting. He has worked with some of the largest organizations and brands across a most industries and sectors, advising how to defend themselves against advanced threat actors and resolve vulnerabilities. Career highlights include being the assurance regional lead at one of the UK's leading cybersecurity consultancies, managing a team of 30 cybersecurity consultants, and helping critical national infrastructure providers stay secure. Most recently, Hornegold was the EU Red Team operations lead at Mandiant, building out and leading the security team to deliver high quality intelligence-led threat simulations. As the product lead at Intruder, he’s bringing this knowledge and experience to help thousands of customers at once. In tune with everyone at Intruder and its company values, Hornegold believes in making cybersecurity as accessible as possible for everyone by reducing the complexity of cybersecurity and helping customers focus on what matters.

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