Security information and event management (SIEM) systems first appeared around 2000 from vendors such as Intellitactics, NetForensics, and eSecurity. Despite the SIEM evolution, todays products can be seen as super-sized versions of those of yesteryear. The SIEM market has grown into a $2.5 billion market, dominated by Splunk, IBM, LogRhythm, and AT&T (AlienVault) The security analytics/operations technology model is in the midst of a massive architectural shift.”]