Cybersecurity in Software Development

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Cybersecurity in Software development By Michael Weber 05. July 2026 Security is not a feature that is added at the end. Learn why 'Security by Design' is the only way to protect your company from cyber attacks.

Every day we read from data leaks, ransomware attacks and hacked companies. Often badly programmed software is the gateway.

In a connected world, software security (AppSec) is not an option. However, a survival question for every company. ♪ The problem. Security as a thought

Traditionally, software was built, tested and tested only at the end of security experts. It was often too late or too expensive to fix core design errors.

The result: "Patchwork" security that is easy to handle. ♪ The solution: Security by Design

Security must be part of the process from day one.

• Requirement phase: Safety targets (confidence, integrity, access) are defined. What data are protected?
• Design phase: Threat modeling. Where could an attacker start? How do we minimize the attack area?
• Development: Compliance with Secure Coding Guidelines (e.g. OWASP Top 10).

The OWASP Top 10: The most common vulnerabilities

Security is not a feature that is added at the end.

When planning Cybersecurity in Software Development from idea to delivery, IT Security, Cost Calculator: Software Development sowie Our Development Process offer practical next steps on our site.

The Open Web Application Security Project (OWASP) lists the most critical risks. This includes:

• Broken Access Control: Users can access data they should not see (e.g. admin area).
• Cryptographic Failures: Sensitive data (passwords, credit cards) are stored unencrypted or with weak algorithms.
• Injection (e.g. SQL Injection): Attackers are causing malicious code via input fields.
• Insecure Design: Logical errors in the concept that cannot be corrected by code fixes.

Safe software measures

1. Input Validation

Short: Never trust user inputs!

Never trust user inputs! Each input must be checked and cleaned before it is processed.

2. Authentication & Authorization

Use proven standards such as OAuth2 or OpenID Connect instead of own Bastel solutions. Implement multi-factor authentication (MFA).

3. Encryption

Data must be encrypted both in the transmission (HTTPS/TLS) and in the rest state (encryption at rest).

4. Regular tests (penetration testing)

Let "friendly hackers" (White Hats) attack your software to find gaps before doing the criminals.

5. Dependency Management

Modern software consists of 80-90% open source libraries.

Tools such as Snyk or Dependabot automatically check whether your dependencies have known vulnerabilities. "Security is a process, not a state. There is no 100% secure software.

However, you can make attackers so hard that they are looking for a lighter target." - Bruce Schneier

Frequently Asked Questions (FAQ)

What is this article about: “Cybersecurity in Software Development”?

Here we cover Cybersecurity in Software Development — focused on architecture, process, and business outcomes. In short: Security is not a feature that is added at the end.

Learn why 'Security by Design' is the only way to protect your company from cyber attacks.

Who benefits most from the content described here?

Typical readers are business and IT leaders in Software development who want to secure quality, security, and ease of upkeep over the long term.

How does this topic fit into an IT or digital strategy?

In a digital strategy, prioritize stable core processes first, then extensions. See also professional software development and consulting.

For multi-system landscapes, IT consulting and architecture helps align vendors and internal teams.

What are sensible next steps if we need support?

If you need support with design, delivery, or modernization: schedule an appointment or outline your project via contact.

Conclusion

Cyberse

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Clarity: Where no primary source is named in the text, figures are illustrative; compare Bitkom and Destatis. Project-related statements: Groenewold IT, 2026.

References and further reading

The following separate references complement the topics in this article:

• Bitkom – German digital industry association.
• German Federal Office for Information Security (BSI).
• European Commission – Digital strategy.
• MDN Web Docs (Mozilla)
• W3C – World Wide Web Consortium.

"Privacy by design is an architecture issue—especially when master data is personal."

— Björn Groenewold, Managing Director, Groenewold IT Solutions