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How can you secure your application throughout the SDLC?

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Security is a critical aspect of application development, but it is not something that can be added as an afterthought. It requires a systematic approach that covers every stage of the software development life cycle (SDLC), from planning to deployment and maintenance. In this article, you will learn how to secure your application throughout the SDLC by following some best practices and tools.

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Sreenu Pasunuri

Orchestrating Cybersecurity Excellence with Passion and Precision | CISA | CRISC | ISO 42K LI & LA | ISO 27K LA |…

1 Plan security requirements

The first step to secure your application is to define and document the security requirements and objectives for your project. You should identify the potential threats, risks, and vulnerabilities that your application may face, and specify the security standards, policies, and controls that you will follow. You should also involve the relevant stakeholders, such as customers, users, and security experts, in this process, and review and update the requirements as needed.

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Sreenu Pasunuri

Orchestrating Cybersecurity Excellence with Passion and Precision | CISA | CRISC | ISO 42K LI & LA | ISO 27K LA | ????22K+ |
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Exactly, having the security requirements from business aspect is very crucial for taking the next steps. Unless the early security requirements are not clear it’s hard for system architects to even consider the level of security required to be considered during the design and subsequent phases.

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2 Design security architecture

The next step is to design the security architecture of your application, which is the framework that guides the security decisions and implementation. You should consider the security principles, such as least privilege, defense in depth, and fail-safe defaults, and apply them to your application components, such as data, code, network, and infrastructure. You should also use secure design patterns and practices, such as encryption, authentication, authorization, and logging, and avoid common security flaws, such as SQL injection, cross-site scripting, and buffer overflow.

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Sreenu Pasunuri

Orchestrating Cybersecurity Excellence with Passion and Precision | CISA | CRISC | ISO 42K LI & LA | ISO 27K LA | ????22K+ |
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Security by design and by default has to be norm without which security controls required to be architected will not be enforced leaving huge gap for the next phases.

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3 Implement security code

The third step is to implement the security code of your application, which is the actual execution of the security architecture and requirements. You should use secure coding standards and guidelines, such as OWASP Top 10, and follow the coding conventions and best practices of your programming language and framework. You should also use secure libraries and tools, such as encryption libraries, code analyzers, and code scanners, and avoid hard-coding sensitive information, such as passwords, keys, and tokens.

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4 Test security functionality

The fourth step is to test the security functionality of your application, which is the verification of the security code and design. You should perform various types of security testing, such as unit testing, integration testing, system testing, and penetration testing, and use automated and manual testing tools, such as vulnerability scanners, fuzzers, and ethical hackers. You should also document and report the security issues and defects, and prioritize and fix them accordingly.

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5 Deploy security configuration

The fifth step is to deploy the security configuration of your application, which is the adjustment of the security settings and parameters for the production environment. You should use secure deployment methods and tools, such as continuous integration and continuous delivery (CI/CD), and encrypt and protect the data in transit and at rest. You should also monitor and audit the security performance and events of your application, such as availability, latency, errors, and breaches.

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6 Maintain security updates

The sixth and final step is to maintain the security updates of your application, which is the continuous improvement of the security functionality and configuration. You should keep track of the security trends and threats, and update your security requirements and architecture accordingly. You should also patch and upgrade your security code and libraries, and perform regular security reviews and audits. You should also educate and train your developers and users on the security best practices and awareness.

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7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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Hemi G.

Driving change in cybersecurity using agile and lean | Cyber Security expert (engineering/architecture) | Application Security | DevSecOps | Secure Software Development Lifecycle (SSDLC)
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This article just covers the surface of the SDLC and ignores the iterative process of maturing SDLC and developing in agile environments. As such it has no practical implementation insights for humans to learn from unless you work in a mature organisation. Which makes it completely miss the point. Keep it simple and start at the most valuable capability, security testing.

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How can you secure your application throughout the SDLC?

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1 Plan security requirements

2 Design security architecture

3 Implement security code

4 Test security functionality

5 Deploy security configuration

6 Maintain security updates

7 Here’s what else to consider

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