A microservice architecture, often referred simply as microservices, is a set of grouped services to implement an application. Lately,  development teams prefer microservices. It facilitates continuous delivery for large applications and adapts easily to the organisation’s needs as its technology evolves and scales up with minimal effort.

microservice architecture

Monolithic applications are a single-tier structure, making it easier to stand up quickly, and they integrate reliably with well-known integrated development environments (IDEs), frameworks, and tools. However, as Monolithic applications get old, their shortcomings begin to show.

As engineers adapt to modern applications, they take with their intimate knowledge the interdependencies of applications. This makes it very difficult to move the development forward at the pace required by the organisation.

By segmenting the application’s functions in a microservice architecture, engineers can easily understand the structure and enhance the speed, meaning they can move quickly to continue development.

Security within an API gateway calls for more scalable methods than centralised session management. Ensuring that users are who they claim to be and that they are allowed access to a service, these gateways typically handle authorisation and authentication for the microservices. To keep their efficiency, security teams need to restructure the security models to keep an adversary’s security in front of the API gateway in mind without forgetting attackers that target a single microservice.

With security being a constant complex challenge for organisations switching to microservices, a cultural shift and a new mindset are necessary foundations for a functioning security strategy. Security, operations, and development personnel need to cooperate across functions in a DevSecOps arrangement that prevents security from getting laid back to develop new capabilities. Instead, teams can use security principles to build their code and have their code peer-reviewed for security concerns before deployment.

The Microservices Architecture growing continously
The Microservices Architecture market continues to grow year on year (Market Research Future)

Of course, there are also several architectural considerations for deploying a secure microservices model, which is explained below:

Securing Access Points With OAUTH2 and OpenID Connect

Many security analysts do not prefer starting from scratch and recommend using OAuth2 and OpenID Connect to delegate authorisation management to a third party or a single (internal) authentication service. In addition, using libraries and functions can shorten the development time and make it easier. Several solutions for improving the security level of your OAuth-based authorisation service have already been built by some of the biggest companies and brightest engineers around.

Use Defence in-depth: 

Defense in depth” is defined as “an information assurance concept in which multiple layers of security controls (defence) are placed throughout an information technology system.”

You need to identify your most sensitive services and manually apply many different security layers to them to get more challenging for a potential attacker who can exploit one of your security layers.

Microservices make it easier to adopt this strategy microscopically and strategically by focusing your security efforts and resources on specific microservices. In addition, the architecture diversifies the layers of security you wish to adopt on each microservice. By this, an attacker who can exploit one of your services may not necessarily be able to figure out how to exploit the second one.

Don’t write your crypto code.

It is advised that when it comes to security, you shouldn’t try to roll your new solutions and algorithms unless you’ve got solid and specific reasons to, and you’ve got people skilled enough to create something nearly as good as the open-source tools already available.

Get your containers out of the public network.

An API gateway establishes a single entry point for all requests coming from all clients. It subsequently knows how to provide an interface for all of your microservices.

Using this technique, you can secure all of your microservices behind a firewall, allowing the API gateway to handle external requests and then talk to the microservices behind the firewall.

Use security scanners for your microservices.

Our automated testing suite can include periodic vulnerability and security scanning for your containers. For example, we could prove a comparatively better scan depth on the client’s systems. You can check out our product and its features here and try out a free 14-day trial here.

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Continuous Security

The best solution for Microservices Security is continuous security that is as flexible and agile as your development. The Crashtest Security Suite can already facilitate vulnerability scans for Microservice projects with our API scanner. However, we will release a new Microservice Scan Target to give you even more control by providing vulnerability scanning solutions specifically for Microservices in the coming weeks.