Atomicorp OSSEC

Atomicorp OSSEC by Atomicorp is an open-source host-based intrusion detection and security monitoring solution adapted for GDPR compliance needs. Its primary purpose is to monitor file integrity, detect suspicious activity, and provide audit-ready logs and alerts that help organisations identify personal data exposures and demonstrate operational controls. The user interface is utilitarian: management consoles and web front ends present alerts, rule hits, and file change summaries in list and timeline views. While not flashy, the interface is efficient for security teams who need rapid access to incident details. Configuration is rule-driven and uses plain-text files or manager policies, which can be very flexible but introduces a steeper learning curve for nontechnical privacy staff. Functionality covers a broad set of detection techniques: comprehensive log parsing, correlation of events across hosts, integrity verification of critical system files, and active responses such as automated blocking or quarantine. Distinctive strengths include a mature rule set, strong community contributions, and the ability to customize detection logic to flag GDPR-relevant events like unauthorized access to personal data stores. Performance and reliability are solid in production environments.