A tool for identify verification using computing device collaboration. The tool generates a hash based, at least in part, on device specific information for one or more user owned devices. The tool determines whether a hash for the initial device matches the hash for at least one of the one or more user owned devices, and if so, sends, one or more challenge questions to the initial device, wherein the one or more challenge questions include at least one challenge question based on the device specific information for the one or more user owned devices. The tool determines whether each of one or more responses to the one or more challenge questions is correct.