Security events on CLI

I am seeing a lot of those security events on the Asterisk CLI.
Looks like these are successful registration attempts from SIP clients.
I have never seen those before with the vvvv verbose level that I am using.
Why am I seeing those?

[2016-10-06 09:37:50] SECURITY[133511]: res_security_log.c:134 security_event_cb: SecurityEvent=“SuccessfulAuth”,EventTV=“1475761070-601215”,Severity=“Informational”,Service=“SIP”,EventVersion=“1”,AccountID=“5466”,SessionID=“0x7f4d4813e808”,LocalAddress=“IPV4/UDP/”,RemoteAddress=“IPV4/UDP/”,UsingPassword=“1”

You are seeing security events because they are enabled for console under Settings, Asterisk Logfile Settings. Or are you asking what is causing the security events?

This as well. Looks like it’s just phones successfully registering, or am I mistaken?