International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 17 June 2015

Michael Scott, Brian Spector
ePrint Report ePrint Report
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.

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