[Resource Topic] 2015/576: The Carnac protocol -- or how to read the contents of a sealed envelope

Welcome to the resource topic for 2015/576

Title:
The Carnac protocol – or how to read the contents of a sealed envelope

Authors: Michael Scott, Brian Spector

Abstract:

Johnny Carson as long time host of the Tonight show often appeared in the spoof role of Carnac the Magnificent, a mentalist who could magically read the contents of a sealed envelope. This is in fact a well known stock-in-trade trick of the mentalist’s craft, known as ``billet reading’'. Here we propose a cryptographic solution to the problem of billet reading, apparently allowing a cipher-text to be decrypted without direct knowledge of the cipher-text, and present both a compelling use case and a practical implementation.

ePrint: https://eprint.iacr.org/2015/576

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