tsu doh nimh writes: Brian Krebs has an interesting and entertaining three-part series this week on how he spent his summer vacation: driving around the Cancun area looking for ATMs beaconing out Bluetooth signals indicating the machines are compromised by crooks. Turns out, he didn't have to look for: His own hotel had a hacked machine. Krebs said he first learned about the scheme when an ATM industry insider reached out to say that some Eastern European guys had approached all of his ATM technicians offering bribes if the technicians allowed physical access to the machines. Once inside, the crooks installed two tiny Bluetooth radios — one for the card reader and one for the PIN pad. Krebs's series concludes with a closer look at Intacash, a new ATM company whose machines now blanket Cancun and other tourist areas but which is suspected of being connected to the skimming activity.