Identity proxy for access control systems

A method of authorizing a user to access to a system comprising a plurality of electronic devices, the method comprising:

• receiving, at a first electronic device of the plurality of electronic devices, a modulated signal via a first capacitive interface defined between an authentication token in contact with the user's body and through a portion of the user's body that is in contact with the first electronic device;
• requesting, by the first electronic device, a credential of the user associated with authorized access to each electronic device of the plurality of electronic devices of the system;
• upon receiving the credential, and at the first electronic device, requesting authorization from the user to use the modulated signal as a proxy for the credential for a selected timeout period;
• and
• after receiving the authorization, and at the first electronic device:
• deputizing the modulated signal as the proxy for the credential for the selected timeout period;
• permitting access to the first electronic device upon receiving the modulated signal at the first electronic device via the first capacitive interface, within the timeout period, and upon determining that the first electronic device is within a selected fixed geographic region, the selected fixed geographic region defined independently of any location of the authorization token;
• permitting access to a second electronic device of the plurality of electronic devices that receives the modulated signal at the second electronic device via a second capacitive interface and determines that the second electronic device is within the selected fixed geographic region;
• and
• denying access to at least the first electronic device upon receiving the modulated signal after the timeout period has expired.