Ne’er-do-wells have long abused a feature in Skype to glean the Internet address of other users. Indeed, many shady online services that can be hired to launch attacks aimed at knocking users offline bundle so-called “Skype resolvers” that let customers find a target’s last known location online. At long last, Microsoft says its latest version of Skype will hide user Internet addresses by default.
The past few years have witnessed a rapid proliferation of cheap, Web-based services that troublemakers can hire to knock virtually any person or site offline for hours on end. Such services succeed partly because they’ve enabled users to pay for attacks with PayPal. But a collaborative effort by PayPal and security researchers has made it far more difficult for these services to transact with their would-be customers.