Klez

An Internet worm that launches automatically when a user previews or reads an affected email message on a system that has not been patched for a vulnerability in Microsoft Internet Explorer mail clients

Keep Learning

Knowledge-Based Authentication

Kraken

Lawful Interception

I like the reassurance I have that Guardio is checking up on things for me! They have prevented me from opening some links that were suspicious before I opened them! That was awesome! They also have removed some issues for me. Definitely worth the money!