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Oleksandr Filipov

Cybersecurity author

Oleksandr Filipov, an author of cybersecurity articles, is a certified cybersecurity engineer with practical experience in the field of information security since 2017.

He graduated from Columbia University (New York, USA) and has obtained many international certifications, including from PentesterLab, Udemy, Ehacking, and IYT Worldwide, covering a wide range of areas, from web pentesting and mobile security to OSINT intelligence.

Oleksandr specializes in conducting penetration testing using the OWASP, OSSTMM, and PTES methodologies, smart contract audits, reverse engineering, vulnerability assessment, and protecting digital resources from DDoS attacks and other external threats.

He works with web services and mobile applications as well as corporate networks.

Among his successful cases are cybersecurity assessments for businesses across various industries, including the banking sector, pharmaceutical and medical organizations, SaaS companies, and others.

In his articles, Oleksandr Filipov shares his own practical knowledge - these materials are useful not only for specialists but also for businesses and cybersecurity enthusiasts. The cybersecurity author writes based on real Datami projects about current threats and vulnerabilities of cyber defense systems, effective security testing methods, and efficient solutions for strengthening the protection of digital resources.

Learn more from our author's cybersecurity practice
What Is a Cyberattack? Oleksandr Filipov
Oleksandr Filipov
What Is a Cyberattack?

Do you know what a cyberattack is and how to recognize it? In this article, we will talk about the motives and consequences of attacks, how to act during an incident, and how to protect yourself from cyberattacks.

15 min Nov 5, 2025
Types of Cybersecurity Vulnerabilities: The Most Common and Critical from Datami’s Practice Oleksandr Filipov
Oleksandr Filipov
Types of Cybersecurity Vulnerabilities: The Most Common and Critical from Datami’s Practice

In this article, we outline the main types of vulnerabilities. Based on the results of our projects, we have also compiled top lists of the most common and the most critical ones.

15 min Mar 7, 2026
Smartphone as a Target: Who Is Responsible When a Mobile App Is Hacked? Oleksandr Filipov
Oleksandr Filipov
Smartphone as a Target: Who Is Responsible When a Mobile App Is Hacked?

When users lose money because of app vulnerabilities, it’s not their fault. We explain where the mobile product owner’s responsibility begins.

4 min Jul 15, 2026
Cyber Risk Self-Assessment: 20 Questions for Fintech Companies Oleksandr Filipov
Oleksandr Filipov
Cyber Risk Self-Assessment: 20 Questions for Fintech Companies

We offer a free cybersecurity self-assessment questionnaire, developed from Datami’s 9 years of experience in pentesting for financial sector organizations.

5 min Jul 15, 2026
Mobile App Penetration Testing: Protection Against Malicious Apps Oleksandr Filipov
Oleksandr Filipov
Mobile App Penetration Testing: Protection Against Malicious Apps

Malicious mobile apps attack not only the smartphone - they deliberately exploit vulnerabilities in your application. Find out how pentesting helps identify these weaknesses before they become a security risk.

15 min Jun 30, 2026
Top Business Cyber Security Issues Oleksandr Filipov
Oleksandr Filipov
Top Business Cyber Security Issues

Which issues in cyber security do businesses face most frequently? In this article, we examine the top 9 most relevant cybersecurity issues by criticality level and provide recommendations for their remediation.

3 min May 4, 2026
What is a Cybersecurity Incident? Oleksandr Filipov
Oleksandr Filipov
What is a Cybersecurity Incident?

Cyber incidents have long ceased to be a headache only for large corporations and government institutions. Today, they are a common part of the digital reality faced by companies of all sizes.

3 min May 4, 2026
Top 3 Industries with the Highest Number of Critical Cybersecurity Vulnerabilities from Datami Practice Oleksandr Filipov
Oleksandr Filipov
Top 3 Industries with the Highest Number of Critical Cybersecurity Vulnerabilities from Datami Practice

Which industries face the highest concentration of critical cybersecurity risks? Based on an analysis of the Datami project results, we identified three sectors where the average number of critical vulnerabilities discovered per project is the highest.

15 min Mar 31, 2026
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