I have been thinking about system security and the types of threats that malware presents to a system. There really are only four types of Malware: Spyders (Malevolent Select), Viruses (Malevolent Insert), Trojans (Malevolent Update) and Bombs (Malevolent Delete). I’ve been playing with other terms: Causus (Cause), Ductus (Person), Modus (Function), Datus (Data), Eventus (Event), Locus (Node). I have also included standard security measures:
I hope these icon ideas get you thinking about system security not just in the context of computer systems.