Breach Databases

What is Breach Databases?

Breach databases are collections of leaked user credentials and sensitive data from past cyberattacks.

Expanded Explanation

These databases are valuable in OSINT investigations and threat intelligence. Researchers use them to verify data exposure, assess risks, and monitor for credential reuse.

Related Terms

Data Breach, Credential Stuffing, OSINT, Leak Sites, Threat Intelligence

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If you’re interested in Breach Databases, we recommend: Learn OSINT (Open-source Intelligence) From Scratch Course

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Zaid Sabih
Zaid Sabih

Ethical Hacker, Pentester & Computer Scientist

Zaid Al-Quraishi is an ethical hacker, computer scientist, and founder of zSecurity. He studied CS at UCD, graduating May 2016.

Zaid has a strong background and experience in ethical hacking, starting with tutorials in 2009 in an ethical hacking community, iSecur1ty. He also worked as a penetration tester (pentester) for this company.

In 2013 he started teaching his first course online in Arabic which received extremely positive feedback. This motivated him to create an English version of the course. The English course became the most popular and top paid course on Udemy for almost a year, which further motivated Zaid to design and teach more courses on ethical hacking.

He now offers a number of courses on ethical hacking and more than 800,000 students on Udemy and other teaching platforms such as StackSocial, StackSkills and zSecurity.

Zaid says: "I just love hacking and breaking the rules but don't get me wrong, I am an ethical hacker!"

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