When developing software, security should always be top of mind. Without the proper security measures in place, software can become vulnerable to malicious attacks, making user data as well as systems open to exploitation. Precisely, to ensure your software development projects are as secure as possible, it’s important to know the best practices for creating as well as maintaining secure software. 

In this blog post, we’ll take a look at 15 security best practices for developing software.

1) Use a Secure Coding Standard

Writing secure code is essential to ensuring the safety and security of your software. A secure coding standard is a set of guidelines and best practices for writing secure code that can be used as a reference for developers. A secure coding standard helps ensure consistency across the development process as well as can help identify any potential security issues in the code.

Precisely, secure coding standards often cover topics such as authentication and authorization, input validation, data encryption, error handling, and more. By following these standards, developers can help minimize the risk of vulnerabilities being introduced into the codebase.

When creating or selecting a secure coding standard, it’s important to consider the language, platform, architecture, and other factors that could influence the level of security needed for your application. Additionally, make sure that your coding standard is reviewed and updated regularly to ensure that it’s up-to-date with the latest security best practices.

2) Protect Your Source Code

Source code is the foundation of your software as well as it contains the blueprint of your application’s architecture, implementation details, and security mechanisms. To protect it precisely, you need to put effective measures in place to secure it from potential intruders or malicious actors. Here are some best practices that you should follow to protect your source code: 

  • Store your source code in a secure location and use access control mechanisms to restrict access. 
  • Use encryption to prevent unauthorized disclosure of your source code. 
  • Monitor all changes made to your source code repository and enforce audit logs. 
  • Securely store all passwords and authentication credentials used by developers. 
  • Implement access control mechanisms for all shared files and folders. 
  • Regularly update and patch your source code repositories. 
  • Ensure that only authorized developers can commit code to the repository. 
  • Create a backup plan for your source code in case of a data breach or system failure. 
  • Use static analysis tools to detect any vulnerabilities in the source code. 
  • Limit access to source code from outside the corporate network. 
  • Utilize automated tools to detect any suspicious changes made to the source code.

3) Perform Static Code Analysis

Static code analysis is a process that uses automated tools to analyze source code for potential security vulnerabilities. It can help identify errors as well as weaknesses that may be difficult to detect with manual code review. Precisely, static code analysis can be used to detect flaws such as buffer overflows, memory leaks, race conditions, code injection attacks, cross-site scripting (XSS), and SQL injection attacks.

When performing static code analysis, it is important to use the latest tools and techniques. These tools should be able to analyze source code for potential security vulnerabilities as well as test for adherence to industry standards. Additionally, these tools should provide detailed results so that developers can take appropriate actions to address any issues found.

Specifically, it is also important to perform regular static code analysis. By running static code analysis regularly, any newly introduced or changed code can be evaluated quickly and any potential security issues can be addressed promptly. This can help ensure the code is secure and will help protect against attackers exploiting the code.

In summary, static code analysis is an important part of the software development process and can help identify and address potential security vulnerabilities in a timely manner.

4) Harden Your Application Infrastructure

A secure infrastructure is an essential part of any secure software development process. Hardening your application infrastructure should be a priority when building and deploying secure applications. 

You can harden your application infrastructure in several ways. First, you should use a virtual private server (VPS) or a cloud platform to host your application. This will give you better control over the configuration of the server, as well as improved security features. You should also ensure that all the server settings are set up securely and regularly updated.

Next, you should make sure that all the components of your application infrastructure are properly secured and patched. Unpatched servers and applications can be a major security risk, so it’s important to make sure everything is up-to-date. Additionally, you should monitor your system activity and use intrusion detection systems to identify and block malicious activity.

Finally, you should use secure authentication and authorization methods to limit access to sensitive data. Implementing two-factor authentication can add an extra layer of security for login procedures, as can using strong passwords and rotating credentials on a regular basis.

5) Encrypt All Sensitive Data

When it comes to protecting your software from potential security threats, it is critical to encrypt all sensitive data. Sensitive data can include usernames, passwords, financial information, and any other type of data that could be used to gain unauthorized access to a system. Encrypting your data prevents hackers from being able to view the data in plain text or using a brute force attack to decode the encryption.

To ensure that your data is properly encrypted, you should use a strong encryption algorithm, such as AES-256 or RSA-4096. Additionally, you should store your encryption keys securely and limit access to them to prevent them from falling into the wrong hands.

Finally, remember to regularly update your encryption algorithms and keys to keep up with the ever-evolving security landscape. By taking the time to properly encrypt your data, you can rest assured that it will remain safe and secure.

6) Follow the Principle of Least Privilege

The Principle of Least Privilege (POLP) is an important security practice that requires limiting the privileges granted to any process or user. With this principle, each process and user should have only the minimal access needed to accomplish its tasks. This means that users should not have any more privileges than they need, and that processes should have only the necessary privileges to complete their tasks.

When it comes to software development, following the Principle of Least Privilege can be a difficult task. Each user or process requires different privileges and access levels, so deciding who should have what can be difficult. To make it easier, developers should think about the risk each privilege poses and set privileges accordingly.

Developers should also make sure to keep track of who has access to what data and resources. It’s important to keep in mind that even seemingly harmless privileges can be misused, so developers should periodically review the privileges that are granted to ensure that they remain appropriate.

Overall, following the Principle of Least Privilege is essential for secure software development. By limiting the access that users and processes have, developers can help ensure that their applications are as secure as possible.

7) Implement Role-Based Access Control

Role-based access control (RBAC) is an important security best practice for software development that helps ensure that only authorized users have access to the system. RBAC assigns privileges to individual users or groups of users, allowing them to view and modify specific resources on the system. This approach helps prevent accidental or intentional data leakage, as well as malicious attempts to gain unauthorized access. 

It’s important to use a comprehensive RBAC strategy when developing software. To start, define the roles that each user can assume and the level of access they will be granted. You should also create a list of actions users can take based on their role, such as creating or editing content, viewing certain pages, or accessing sensitive data. Finally, keep track of who has what privileges and audit the changes regularly. 

When developing software, implementing RBAC is essential in order to maintain a secure system. By defining roles and permissions for each user, you can ensure that only those who are allowed can gain access to the system and its resources. This will help protect your software from malicious attempts to gain access and will make sure that sensitive data is not inadvertently leaked.

8) Avoid Insecure Cryptographic Algorithms

Cryptography is a critical component of security for software applications, and it’s important to ensure that the algorithms used for cryptographic operations are secure. Outdated and deprecated algorithms such as MD5, SHA-1, and DES should never be used in new projects as they are no longer considered secure. Instead, use a strong algorithm like SHA-2, RSA or AES for hashing, encryption, and digital signature operations. Make sure to use up-to-date implementations of these algorithms, which often involve the use of long keys. It is also important to consider the impact of different key lengths when using cryptographic algorithms; longer keys are generally stronger and more secure than shorter ones. Finally, don’t forget to securely store the keys used for cryptographic operations. This is essential for ensuring that your data remains secure even if an attacker gains access to the application code.

9) Use Secure Authentication and Authorization

Authentication and authorization are two of the most important components of a secure system. Authentication is the process of verifying the identity of a user, while authorization is the process of granting access to certain resources based on that user’s identity. To ensure secure authentication and authorization, organizations should use strong, multi-factor authentication methods such as biometrics or two-factor authentication. Additionally, all credentials should be encrypted in transit and at rest, and all authentication processes should be monitored for suspicious activity. Organizations should also implement role-based access control (RBAC) to grant privileges to only those users who need them and limit access to sensitive data. Finally, organizations should audit authentication and authorization processes regularly to ensure that they are up-to-date and secure.

10) Validate All User Input

Validating user input is one of the most important steps in software development. It’s essential to ensure that the data entered by users is legitimate, accurate, and secure. Validation should be done both on the client-side and server-side to ensure that malicious data is not stored or processed.

Client-side validation should be used to check the format and length of user input. This can be done by using JavaScript and HTML5 form validation techniques. These techniques can help protect against malicious code injections, SQL injections, cross-site scripting, and buffer overflows. 

Server-side validation is also important to check for malicious data before it is stored or processed. This can include checks for valid characters, valid input lengths, and minimum/maximum values. Regular expressions are often used to define rules and patterns that must be followed in order to accept user input.

It’s also important to sanitize all user input before it is stored or processed. This includes stripping out any potentially dangerous characters or tags and encoding user input so it cannot be interpreted as code. 

Finally, don’t rely solely on validation and sanitization. Use an intrusion detection system or web application firewall to monitor your system and detect malicious activity.

By taking these steps to validate user input, you can help protect your software from malicious attacks and data breaches.

11) Sanitize All Output

Sanitizing output is a critical security measure for any software development project. Output sanitization helps to prevent cross-site scripting (XSS) attacks, by ensuring that all data entered into a system is properly formatted and free of malicious code. 

In order to properly sanitize output, developers must understand the specific character set and encoding used by their application. They should also make sure to encode all user-supplied data before displaying it. This includes HTML special characters, JavaScript, SQL, and URL encoding. Doing so prevents malicious code from executing when displayed in a web browser. 

Developers should also be aware of the potential for XSS attacks even when using safe methods of output encoding. Therefore, they should always validate input data, and consider using a web application firewall (WAF) to protect against such attacks. Additionally, developers should be sure to log all requests that contain potentially malicious code, as this can help them identify suspicious activity. 

By taking the time to properly sanitize output and ensure that all data is properly encoded, developers can help protect their applications from XSS attacks and other forms of malicious activity.

12) Use a Web Application Firewall

A web application firewall (WAF) is a security tool that provides an additional layer of protection for web applications by monitoring incoming and outgoing network traffic. It is designed to detect and block malicious requests while allowing legitimate requests to pass through. WAFs can be used to protect against common web application attacks such as SQL injection, cross-site scripting (XSS), parameter tampering, etc.

When configuring a WAF, it’s important to establish proper rules that define what types of traffic are allowed and what types should be blocked. This can be done by setting up various security rules that determine the type of content that can pass through the firewall and what types should be blocked. For example, you can create rules that restrict access to certain webpages or directories, block malicious user agents, or even prevent access from certain IP addresses or ranges.

It’s also important to ensure that the WAF is regularly updated to address new threats and vulnerabilities. This can be done by subscribing to a security service that provides regular updates for the WAF. Additionally, it’s important to periodically review the WAF’s logs to ensure that the WAF is properly configured and is working correctly.

By using a WAF, organizations can dramatically reduce their risk of being attacked by malicious actors. However, it’s important to note that a WAF is not a replacement for other security measures such as secure coding standards, application hardening, etc. It should only be used as an additional layer of defense in order to help protect your applications from attack.

13) Implement Intrusion Detection and Prevention

Intrusion Detection and Prevention is an important component of secure software development. It is designed to detect and prevent malicious activity such as unauthorized access, data manipulation, or denial of service attacks. It can be implemented in a variety of ways depending on the specific needs of your system. 

Network Intrusion Detection Systems (NIDS) monitor network traffic for suspicious patterns. It looks for signs of malicious activities like port scans, data breaches, and buffer overflows. Network Intrusion Prevention Systems (NIPS) are similar to NIDS but with the added capability of responding to any suspicious activities it detects. 

Host-based Intrusion Detection Systems (HIDS) are installed directly on servers and workstations and look for abnormal behavior within the system. It can be used to detect unauthorized changes, malicious process execution, rootkit installations, and other malicious activities. Host-based Intrusion Prevention Systems (HIPS) are similar to HIDS but with the added ability to take action if it detects suspicious activities. 

It’s important to ensure that your Intrusion Detection and Prevention systems are regularly maintained and updated. This will ensure that they are up to date with the latest security threats and can continue to protect your system. Keeping an eye on system logs is also a key part of effective Intrusion Detection and Prevention, as they can provide you with valuable insights into what’s happening on your system.

14) Monitor Your System Activity

Monitoring your system activity is an important step in keeping your software secure. When developing software, it’s essential to be aware of the changes happening in real-time within your system. By monitoring your system activity, you can detect malicious behavior and respond quickly if a breach occurs.

When monitoring your system activity, it’s important to identify any anomalies that may indicate a security issue. For example, if you detect an unusual amount of traffic from a specific IP address, you should investigate further to ensure that it’s not malicious. Additionally, it’s important to pay close attention to the user activity on your system. Look for any suspicious activities such as logins from unfamiliar IP addresses or attempts to access restricted files.

In addition to tracking user activity, it’s also essential to monitor any changes made to your system. Regularly check for new applications installed or permissions granted that could compromise the security of your system. You should also regularly review audit logs to detect any suspicious events or changes.

Finally, when monitoring your system activity, make sure you have adequate logging enabled. This will provide you with detailed records of all activities occurring on your system, which can be useful for troubleshooting security issues or responding quickly if an attack is detected.

15) Stay Up-to-Date on Security Issues

Keeping up with security issues is essential for any software developer. The threat landscape changes rapidly and new vulnerabilities are discovered every day. It’s important to stay informed and take proactive measures to protect your applications.

Start by subscribing to security newsletters, RSS feeds, and other industry-related publications. This will help you stay current on security issues, trends, and best practices. It’s also important to join mailing lists, forums, and other online communities related to security. You can use these resources to ask questions, share ideas, and learn from other experienced developers.

You should also keep an eye on the news. Pay attention to security-related stories, especially ones related to software development. This can help you identify potential threats and new attack vectors.

Finally, make sure to attend conferences, workshops, and seminars related to software development and security. These events provide valuable opportunities to meet other professionals in the industry, learn about emerging trends and technologies, and gain insight into best practices.


Developing secure software is an ongoing process. As new security threats arise, developers must continuously update their practices and keep abreast of the latest developments in order to ensure the safety of their applications. Adopting the security best practices outlined in this article will go a long way toward ensuring the safety of your software. If you need help developing secure software, it’s important to hire experienced app developers who have a strong understanding of security and know how to implement these best practices.

Frequently Asked Questions

Q1. What is secure coding?

A1. Secure coding is the practice of writing code that follows established security guidelines to help protect an application from malicious attacks and other security vulnerabilities.

Q2. What is static code analysis?

A2. Static code analysis is a type of software testing technique that scans the source code of a program for potential bugs, coding errors, and security flaws.

Q3. What is the principle of least privilege?

A3. The principle of least privilege states that a user or process should only have the minimum amount of privileges necessary to accomplish its task.

Q4. What is role-based access control?

A4. Role-based access control (RBAC) is an access control system that grants privileges to users based on their roles in an organization.

Q5. What are insecure cryptographic algorithms?

A5. Insecure cryptographic algorithms are algorithms that are vulnerable to being cracked by attackers, which could potentially expose sensitive data.

Q6. How do I use secure authentication and authorization?

A6. To use secure authentication and authorization, you should implement a secure login system with a strong password policy and two-factor authentication.

Q7. What is user input validation?

A7. User input validation is a process of verifying that data entered into an application by a user is valid before it is stored or processed by the application.

Q8. What is output sanitization?

A8. Output sanitization is the process of filtering or removing potentially malicious data from the output of an application before it is displayed to a user.

Q9. What is a web application firewall?

A9. A web application firewall (WAF) is a network security device that filters and monitors HTTP traffic between an application and the Internet, protecting the application from malicious activity.

Q10. What is intrusion detection and prevention?

A10. Intrusion detection and prevention is a security strategy designed to detect and prevent malicious actors from gaining unauthorized access to computer systems or networks.