Cyber Defence: AlienVault OSSIM, the most used open source SIEM
So declares AlienVault, a private American company of software development headquartered in San Mateo, California, in Silicon Valley and offices in many countries of the world.
But, First of all,, What is a SIEM?
SIEM is an acronym for Security Information and Event Management that is information security and event management.
OSSIM is an Open Source SIEM, as the acronym: Open Source Security Information and Event Management… System.
Source: Defense Online