Methods and devices for computing a shared encryption key

Details Methods and devices for computing a shared encryption key Methods and devices for computing a shared encryption key

H - Electricity

04

W

H04W 12/04 (2009.01) G06F 7/00 (2006.01)

Patent

CA 2731006

Embodiments described herein are generally directed to methods and devices in which computing devices, and mobile devices in particular, establish a shared encryption key for a device group comprising at least three mobile devices. In accordance with one example embodiment, a public key of a mobile device is computed using a shared password as performed in accordance with authentication acts of a password- authenticated key exchange protocol, and transmitted to at least one other mobile device of the group. A public value is computed as a function of a mobile device private key and of a public key of at least one other mobile device of the device group, in accordance with a group key establishment protocol. The public values of the mobile devices of the device group are used to compute a shared encryption key.

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