A first computing device is detected as substantially collocated with a wireless token device, using a short-range wireless communication network, and a connection is established between the first computing device and the wireless token device over the short-range wireless network. Authentication data stored in memory of the wireless token device is sent from the wireless token device to the first computing device over the short-range wireless network. The first computing device is authenticated to a particular computing session based on the authentication data and authenticating the first computing device permits the first computing device to participate in the particular computing session.