How to Write Code That’s Resistant to Cyberattacks

Secure coding practices are critical for developing applications resistant to hacking and cyberattacks. As cyber threats become increasingly complex and sophisticated, software developers must prioritise secure coding practices to ensure the protection of their applications and users.

This blog post will provide an overview of secure coding practices, the threat landscape, the principles of secure coding practices, techniques and tools for secure coding, and best practices for writing secure code.

Understanding the Threat Landscape

The threat landscape is constantly evolving, and it is important for developers to understand the most common cyber threats and attacks. Numerous types of cyber attacks exist, including phishing attacks, malware, ransomware, and denial-of-service attacks. One of the most significant vulnerabilities in software and applications is using unsecured third-party libraries and frameworks.

By exploiting these vulnerabilities, hackers can gain access to sensitive information or take control of the application, causing severe impacts ranging from financial losses to damage to a company’s reputation.

Essential Principles for Developing Secure Code

Secure coding practices are designed to ensure that software is developed with security to minimise the risk of cyberattacks and data breaches. The following are some essential principles for secure coding practices:

  1. Principle of Least Privilege: The security concept of the Principle of Least Privilege mandates that software must operate with the minimum level of access essential to carry out its tasks. Limiting the privileges of software and users can reduce the risk of unauthorised access and malicious activity.
  2. Fail-Safe Defaults: Fail-safe defaults are settings that are put in place to ensure that software operates in a safe mode in case of errors or attacks. Fail-safe defaults can include, for example, default passwords or account lockout policies, which help prevent attackers from gaining unauthorized access to the system.
  3. Defense in Depth: Defense in depth is a security strategy that employs several layers of protective measures to defend against threats and mitigate the likelihood of a single point of failure. This security approach can incorporate tactics like firewalls, intrusion detection systems, and access controls.
  4. Principle of Complete Mediation: The Principle of Complete Mediation requires that all accesses to an object be checked for authorisation. This means that whenever a user requests access to an object, the system must check whether the user can access it. This principle helps to prevent unauthorised access and privilege escalation.
  5. Least Common Mechanism: The Least Common Mechanism principle requires that software shares the minimum amount of code possible between different users or processes. This helps to reduce the risk of cross-site scripting attacks, where an attacker can exploit a vulnerability in one part of the system to gain access to other parts.
  6. Secure by Default: Secure by Default means that software should be designed to be secure out of the box. This includes ensuring that default settings and configurations are secure and that users are prompted to change any default passwords or settings before using the software.
  7. Separation of Duties: Separation of Duties is a security principle that requires different users or processes to be responsible for different aspects of a system. This helps prevent any user or process from having too much control or access to the system, reducing the risk of unauthorised access or malicious activity.

Best Practices for Secure Coding

Secure coding is essential for developers who want to protect their software from cyberattacks and data breaches. Developers can write more secure and less vulnerable code following these best practices.

  1. Use secure coding frameworks and libraries: Using established coding frameworks and libraries can significantly reduce the risk of vulnerabilities in your code. These frameworks and libraries are typically developed and maintained by security experts who deeply understand the most common security threats and how to protect against them.
  2. Keep software and libraries up-to-date: Software and libraries can be vulnerable to attacks if they are not updated with the latest security patches and updates. Developers should regularly check for updates to their software and libraries and apply them promptly.
  3. Use strong authentication and access control: Developers should use strong authentication and access control measures to prevent unauthorized access to their software. This can include two-factor authentication, password hashing, and role-based access control.
  4. Practice secure data storage and transmission: Programmers ought to guarantee that data is stored and transmitted securely. This can involve encryption, hashing, and other security procedures to safeguard data at rest and in transit.
  5. Implement error handling and logging: Error handling and logging can help developers identify security vulnerabilities and potential attacks. Error handling can prevent attackers from exploiting vulnerabilities, while logging can provide developers with valuable information about the source and nature of attacks.
  6. Use automated tools for code analysis: Automated code approaches like fuzz testing can help developers identify security vulnerabilities in their code. These instruments can identify likely susceptibilities such as cross-site scripting (XSS), SQL injection, and buffer overflow glitches. To learn more about fuzz testing, click here.
  7. Perform regular security testing and assessments: Developers should perform regular security and software assessments to identify potential vulnerabilities and security weaknesses. This may involve conducting penetration testing, vulnerability scanning, and security assessments. If you are developing on Java for example, then it is advisable to follow industry standard Java testing methods to secure your core. 

Learn more about how to test an application in Java


With the increasing frequency and severity of cyberattacks, secure coding practices have become essential to safeguarding software and protecting user data. By following best practices, such as using certain coding frameworks, implementing access controls, practicing defense-in-depth, and performing regular security testing, developers can reduce the risk of vulnerabilities and ensure their software is more secure.

Zayan Ali

Zayan Ali is a professional article writer with a passion for creating compelling content that informs, inspires, and engages readers. With several years of experience in the field, Zayan has honed his writing skills and developed a deep understanding of various topics, including business, technology, lifestyle, and more.

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