Alejandro Caceres is a distributed computing fanatic and security researcher or whatever hackers are supposed to call themselves these days (he lost track of buzzwords when the acronym APT was invented). He's conducted research and presented at the big cons on offensive distributed computing techniques against massive targets (e.g. significant portions of the Internet or the entire Internet when he's feeling frisky). His research is cool and stuff, but he is most proud of getting hit repeatedly with a wooden paddle by a DEF CON goon at DEF CON 21 as well as annoying Bruce Potter on Twitter one time.