iMac os x 10.7.3 loin safari can't verifi identity of most sites. keychaine

Hi this is my first post.. i am having trouble with my keychaine I keep receiving warnings from Safari that I am accessing an insecure site

and my mac is lagging.

having same problems with

firefox cannot open this web page your connection is in insecure

someone maybe trying impersonate you etc

Also keep getting this in console have had

a problem before with adobe air

but never the warnings

kernel: IOSurface: buffer allocation size is zero

any help would be great thanks 🙂

Keychain image

Don't no if this is wright