A device (102A...n; 102A') for determining confidence of user identity, comprising: a communication module operable to interact with at least one other device (102A...n; 102A'); a data collection module (112A...n) operable to collect data for use in determining an identity of a user in possession of the device (102A...n; 102A); and a confidence module (106A...n; 106A') operable to at least: receive the data from the data collection module (112A...n); determine a device confidence level (108A...n) that the identity of the user is authentic based on at least the data; receive a second device confidence level (108A...n) from a second device (102A...n; 102A') of the at least one other device (102A...n; 102A'); characterized in that the confidence module is further operable to determine that the device (102A...n; 102A') and the second device (102A...n; 102A') collect at least some common data; compare the common data collected by the device (102A...n; 102A') and the second device (102A...n; 102A'); determine whether or not the second device (102A...n; 102A') is in the possession of the user based on the comparison; and determine a combined device confidence level (108A+C;108B+n) based on the device confidence level (108A...n), the device confidence level (108A...n) of the second device and the determination whether or not the second device (102A...n; 102A') is in the possession of the user. a communication module operable to interact with at least one other device (102A...n; 102A'); a data collection module (112A...n) operable to collect data for use in determining an identity of a user in possession of the device (102A...n; 102A); and a confidence module (106A...n; 106A') operable to at least: receive the data from the data collection module (112A...n); determine a device confidence level (108A...n) that the identity of the user is authentic based on at least the data; receive a second device confidence level (108A...n) from a second device (102A...n; 102A') of the at least one other device (102A...n; 102A'); characterized in that the confidence module is further operable to determine that the device (102A...n; 102A') and the second device (102A...n; 102A') collect at least some common data; compare the common data collected by the device (102A...n; 102A') and the second device (102A...n; 102A'); determine whether or not the second device (102A...n; 102A') is in the possession of the user based on the comparison; and determine a combined device confidence level (108A+C;108B+n) based on the device confidence level (108A...n), the device confidence level (108A...n) of the second device and the determination whether or not the second device (102A...n; 102A') is in the possession of the user. receive the data from the data collection module (112A...n); determine a device confidence level (108A...n) that the identity of the user is authentic based on at least the data; receive a second device confidence level (108A...n) from a second device (102A...n; 102A') of the at least one other device (102A...n; 102A'); characterized in that the confidence module is further operable to determine that the device (102A...n; 102A') and the second device (102A...n; 102A') collect at least some common data; compare the common data collected by the device (102A...n; 102A') and the second device (102A...n; 102A'); determine whether or not the second device (102A...n; 102A') is in the possession of the user based on the comparison; and determine a combined device confidence level (108A+C;108B+n) based on the device confidence level (108A...n), the device confidence level (108A...n) of the second device and the determination whether or not the second device (102A...n; 102A') is in the possession of the user.