Google temporarily disabled provisioning of its prepaid Google Wallet cards used in some NFC-ready phones. Move follows last week’s discovery of a vulnerability in Google Wallet described by security researchers. Move was intended to address “unauthorized use of an existing prepaid card balance if someone recovered a lost phone without a screen lock” Google Wallet is protected by its own PIN, as well as the phone’s lock screen, but only if the user sets the lock screen. Users of Google Wallet can still use a Citi-issued MasterCard credit card with Google Wallet.”]