Polling with physical envelopes: a rigorous analysis of a human-centric protocol
EUROCRYPT'06 Proceedings of the 24th annual international conference on The Theory and Applications of Cryptographic Techniques
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We give a practical polling protocol that is immune to tampering by either the pollster or the responder. It preserves responders' privacy in the manner of Warner's Randomized Response Technique, is easily understood without any knowledge of cryptography, and does not require the use of computers or other electronics. The key is to use physical noisy channels commonly found in lottery or game-show settings, which can deliver the desired properties without relying on a mechanism which is unfamiliar to the responder.