Cryptology ePrint Archive: Report 2013/590

EyeDecrypt -- Private Interactions in Plain Sight

Andrea Forte and Juan Garay and Trevor Jim and Yevgeniy Vahlis

Abstract: We introduce EyeDecrypt, a novel technology for privacy-preserving human-computer interaction. EyeDecrypt allows only authorized users to decipher data shown on a public display, such as an electronic screen or printed material; in the former case, the authorized user can then interact with the system (e.g., by pressing buttons), without revealing the details of the interaction to others who may be watching. The user views data on a closely-held personal device, such as a pair of smart glasses with a camera and heads-up display, or a smartphone. The decrypted data is displayed as an image overlay on the personal deviceóa form of augmented reality. The userís inputs are protected through randomization. EyeDecrypt consists of three main components: a visualizable encryption scheme; a dataglyph-based visual encoding scheme for the ciphertexts generated by the encryption scheme; and a randomized input and augmented reality scheme that protects user inputs without harming usability. We describe all aspects of EyeDecrypt, from security definitions, constructions and formal analysis, to implementation details of a prototype developed on a smartphone.

Category / Keywords: cryptographic protocols / visual cryptography; secret-key cryptography; implementation

Date: received 11 Sep 2013

Contact author: forte at att com

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Version: 20130914:223812 (All versions of this report)

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