Daniel B. Cid is the lead developer of the open source OSSEC HIDS and a principal researcher at Trend Micro, Inc. His interests range from intrusion detection, log analysis (log-based intrusion detection) and secure development. He is an active member of the open source community, specially known for creating the OSSEC, Rootcheck and Syscheck packages. He is also the co-writer of the Host-Based Intrusion Detection Guide book.
On June 2008, he sold his open source project OSSEC to Trend Micro/Third Brigade, and joined the company as the lead of OSSEC development.