If you're the type who uses Venmo to pay your buddies back for artisanal cupcakes, congratulations: You're a little bit safer now. Venmo announced the other day that it was rolling out a new two-factor identification feature -- when the service detects a login from a new device, it'll send you an email and a 6-digit pin to your phone so you can prove everything's on the up and up. That might sound like a no-brainer for a financial services company that's (thanks to back-to-back acquisitions) part of eBay's payments empire, and you know what? It absolutely is. The only thing more shocking than Venmo not having something like this in the first place is how long its taken to implement.