Dear Reader,
Protecting data is not a destination - it’s a journey. Each step requires new tools, sharper vigilance, and stronger layers of defense. In this edition of the DPO Newsletter, we explore a decisive “weapon” in the security toolkit: Penetration Testing (Pentest).
In an era where cyber threats are multiplying and vulnerabilities are discovered and exploited faster than ever, “demystifying” Pentest becomes essential. By simulating real-world attacks, Pentest is not only a technical measure for legal compliance and effective data protection but also a way to build trust with stakeholders.
In this article, Data Protectify will break down what Pentest really is, its advantages and disadvantages, and its importance in helping organizations establish security measures that are stronger, more transparent, and more reliable.
Let’s demystify Pentest together!
Overview
1.1. Definition
Pentest (Penetration Testing) is an essential part of cybersecurity audits and information security risk assessment. It involves simulating attack scenarios to exploit vulnerabilities in systems, applications, or IT infrastructure. Through this process, organizations can identify security gaps, evaluate the effectiveness of their defensive controls, and gain actionable insights to strengthen resilience against cyber threats.
1.2. Classification
- Black-box: Black-box testing places the pentester in the role of an external attacker with no prior knowledge of the target system. Testers receive no internal diagrams or source code and must rely on dynamic analysis, automated tools, and manual techniques to discover vulnerabilities. They often build their own map of the target network through observation. This approach is faster to execute, but if the tester cannot breach the perimeter, internal vulnerabilities remain undetected.
- Gray-box: Gray-box testing gives pentesters partial knowledge of the target system, such as design documents or user-level access with potential privileges. This approach allows pentesters to focus on high-risk areas from the start and evaluate security both inside and outside the network perimeter. By simulating an attacker with limited insider access, gray-box testing provides a more efficient and targeted assessment than black-box testing.
- White-box: White-box testing, also known as clear-box or open-box testing, gives pentesters full access to source code, architecture documents, and system details. This enables both static and dynamic analysis, requiring expertise with tools such as code analyzers and debuggers. While the depth of information makes white-box testing the most time-consuming approach, it offers the most comprehensive assessment of internal and external vulnerabilities. However, the pentesters’ full system knowledge may influence their perspective compared to real-world attackers.
1.3. Advantages and Disadvantages of Pentest
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Advantages |
Disadvantages |
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Timely vulnerability detection: Enables identification of potential security vulnerabilities, preventing hackers from exploiting and infiltrating the system. |
Tester-dependent: The effectiveness of Pentest largely depends on the skills, experience, and expertise of the security professionals conducting the test. |
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Comprehensive assessment: Ensures that the system is thoroughly examined, including its operational effectiveness and resilience against attacks. |
Limited scope: Expanding the scope of testing increases both the duration and costs of implementation. |
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Safe and effective method: Pentest provides a secure and practical approach to testing without adversely affecting the system or its data. |
High costs: The cost of penetration testing varies depending on the complexity of the system, the scope of testing, and the time required for execution. |
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Clear planning: The testing process can be scheduled with defined start and end dates, facilitating easier management and progress tracking. |
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Adequate preparation: Allows organizations to allocate necessary resources and implement measures before, during, and after the testing process. |
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Pentest’ Role in security & compliance
Prevent data risks: Pentest enables organizations to proactively identify vulnerabilities or potential violations before they materialize, thereby safeguarding personal data.
Legal compliance: In Vietnam, the Cybersecurity Law 2018 (Art. 5, 17.2.a) and Decree No. 53/2022/ND-CP (Art. 11.4, 16.1) establish obligations for cybersecurity inspection, under which “system intrusion test attacks” is expressly recognized as a mandatory component. Likewise, Art. 11 of Circular No. 12/2022/TT-BTTTT prescribes Pentest as part of periodic information security assessment that agencies and organizations must perform. In addition, although Vietnam’s Data Law, PDPL, as well as the GDPR and ISO 27001 do not explicitly mandate penetration testing, it is recognized as a valuable data protection measure that organizations can adopt to strengthen compliance. Its also relates directly to ISO 27001 controls such as technical vulnerability management and security testing during development and acceptance.
Protect critical data: Pentest serves not only to secure customer information but also to protect an organization’s intellectual property and other critical data assets from unauthorized access. Accordingly, it constitutes a vital safeguard to ensure that sensitive data remains secure.
Best practice for Pentest
Clearly define scope and objectives before conducting a Pentest: This minimizes the processing of personal data under the PDPL, ensures compliance with the GDPR’s data minimization principle, and aligns with other relevant data protection regulations. A well-defined scope enables organizations to select the most appropriate form of Pentest and ensures that the assessment effectively addresses their security needs.
Frequent test: Pentest should be conducted one to two times per year, or at least once annually. The frequency often depends on the size of the company, the number of employees, and specific industry requirements.
Priority systems for Pentest include:
+ Newly deployed or significantly modified systems – testing is required post-deployment or after major upgrades to assess the impact on information security.
+ Mission-critical systems – those whose disruption would halt the organization’s operations.
+ Systems processing personal data.
Combine automated and manual testing: Automated Pentest tools can quickly identify common vulnerabilities such as outdated software, misconfigurations, or widely known weaknesses. However, these tools often fail to detect sophisticated or context-specific vulnerabilities. Therefore, the involvement of ethical hackers remains essential to provide deeper insights, simulate real-world attack scenarios, and ensure a more comprehensive security assessment.
Conclusion
Pentest is an important part of the security strategy of modern organizations, especially in the context of increasing cyber security threats. Pentest not only helps to detect potential security vulnerabilities but also contributes to improving the system's readiness against cyber attacks.
At Data Protectify, we empower you to implement proactive security measures while ensuring compliance with data protection regulations. Stay tuned for the next articles of DPO Newsletter to discover new, comprehensive solutions that help your organization improve its defense capabilities and build strong trust in the modern digital age.