Conference paper Open Access

Shake Hands to Bedevil: Securing Email with Wearable Technology

Renkema-Padmos, Arne; Baum, Jerome; Renaud, Karen; Volkamer, Melanie

Email users rarely use end-to-end encryption. It takes effort and requires explicit action.
Users may not see the need for this, have access to the technology, possess the know-how, or
may be faced with complex interfaces. To enable effortless exchange of encrypted emails we
propose KeyRing, a design for a wearable device that builds on in-person trust establishment
through device pairing. This pairing can be used to make the exchange of secure emails
between the wearers easier. We discuss how the corresponding interactions of handshake,
seal, and unseal can be implemented, and find that the most promising approaches are a ring
communicating over infrared and a wristband communicating over Bluetooth. Issues around
the human-device interface, user acceptance, feasibility, and deployment are discussed, but
need further work.

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