Fancy About

Daniel B. Cid is the founder of CleanBrowsing , focused on helping parents, schools and businesses protect kids from adult content online. He is also the original founder of the open source OSSEC HIDS, founder/CTO of Sucuri , and former VP of Engineering for the security products division at GoDaddy. He is passionated about intrusion detection , log analysis, malware research and web/online security.

He is an active member of the open source and security community, specially known for creating the OSSEC HIDS (Intrusion detection system) and founding Sucuri & CleanBrowsing. He is also the co-writer of the Host-Based Intrusion Detection book.

In the past, he worked at Trend Micro, Q1Labs (now IBM), Sourcefire (now Cisco) and on his own ventures.

On June 2008, he sold his open source project OSSEC to Trend Micro, and joined Trend as the lead of OSSEC development.

On April 2017, he sold Sucuri to GoDaddy and joined the company as a VP of Engineering.

I am Social

Well, not really. But I am on Twitter (@danielcid) and on Linkedin.

A centralized repository to all my research and articles is available here:

You can also reach me via email: or


And you can follow the OSSEC and Rootcheck development via my bitbucket repository:

Or some of my new research on DNS security (DNS over HTTPS/TLS) via GitHub:

Interviews and Papers

Some interviews with me:

Old Conferences and papers

Old OSSEC Proud moments



Some public pictures of me. More here:

Quick Links


My Projects