What is Security Testing?
Security testing is the process of examining an application to find vulnerabilities before attackers do. Using techniques such as scanning, code analysis and simulated attacks, it identifies weaknesses in authentication, data handling and configuration so they can be fixed before they are exploited in production.
How does security testing work?
Security testing systematically probes an application to uncover weaknesses an attacker could exploit. Rather than checking whether features work, it checks whether the system can be misused - whether data can be stolen, access bypassed or the service disrupted. It combines automated tools and human expertise to examine the application from the outside, the inside and the code itself.
Approaches range from automated vulnerability scanning, to static analysis that inspects source code, to dynamic testing of the running application, through to penetration testing where skilled testers actively attempt to break in. Each surfaces different kinds of flaw, which is why a thorough programme uses several together.
Why security testing matters
Most breaches exploit known, preventable weaknesses. Security testing is how those weaknesses are found while they are still cheap to fix and before they appear in a headline. For products handling personal data, payments or health information, it is also frequently a compliance requirement, not just good practice.
The cost asymmetry is stark: a vulnerability found in testing costs a developer some time, while the same vulnerability exploited in production can cost stolen data, regulatory penalties and lasting loss of user trust. Once trust is lost, it is far harder and more expensive to win back than it would have been to test thoroughly in the first place.
What are the main types of security testing?
- Vulnerability scanning - automated checks against known weaknesses.
- Static analysis (SAST) - inspecting source code without running it.
- Dynamic analysis (DAST) - testing the running application from outside.
- Penetration testing - skilled testers simulating real attacks.
- Dependency scanning - finding vulnerable third-party libraries.
- Configuration review - checking servers and services are securely set up.
Security testing best practices
Test continuously rather than once before launch, because new code and new dependencies introduce new risk. Automate scanning into the deployment pipeline so issues are caught early, and supplement automation with periodic human penetration testing, which finds logic flaws machines miss. Prioritise findings by real-world risk rather than raw count, and re-test after fixes to confirm the weakness is actually closed.
How PixelForce approaches security testing
At PixelForce, security testing is woven into Phase 2 - Development, QA and Release and continues through Phase 3 - Post Launch Support, because new code and dependencies change the risk picture over time. Our in-house Adelaide team treats security checks as part of the QA process rather than a one-off gate, complementing the secure coding habits applied during the build. This matters most for products with strict data and infrastructure obligations, which is why it sits alongside our enterprise mobile app development and aws devops consulting australia work. If testing reveals a serious exposure, we report it plainly and prioritise the fix rather than shipping around it.
Where this applies
The PixelForce services where Security Testing matters most - explore how we put it to work in client products.
Related terms
Other glossary definitions closely related to Security Testing.
Frequently asked questions
Penetration testing is one type of security testing, where skilled testers actively simulate real attacks to break into a system. Security testing is the broader category, which also includes automated vulnerability scanning, static code analysis, dynamic testing and configuration reviews. A complete programme combines automated security testing for breadth and frequency with periodic penetration testing for depth and the human insight that finds logic flaws tools miss.
Continuously, not once. Automated scanning and dependency checks should run on every build through the deployment pipeline, so new vulnerabilities are caught as code changes. Deeper penetration testing is typically done periodically - for example before major releases or on a regular schedule - and after significant architectural changes. Security is not a fixed state, so a one-off test before launch leaves the product exposed as it evolves.
SAST, static application security testing, inspects the source code without running it, finding flaws early in development. DAST, dynamic application security testing, probes the running application from the outside, the way an attacker would, finding issues that only appear at runtime such as configuration and authentication flaws. They are complementary: SAST catches code-level problems early, DAST validates the deployed system behaves securely.
Often, yes. Standards and regulations covering payments, personal data and health information frequently require regular security testing and vulnerability assessment as part of demonstrating that data is adequately protected. Beyond formal compliance, customers and partners increasingly expect evidence of security testing. Treating it as a compliance-only exercise is short-sighted, but compliance is a common and legitimate driver for putting a testing programme in place.
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