Oblivious Printing of Secret Messages in a Multi-party Setting

In Conference on Financial Cryptography and Data Security (FC), 2012

Aleksander Essex and Urs Hengartner

Abstract. We propose oblivious printing, a novel approach to document printing in which a set of printers print a secret message—in human or machine readable form—without learning the message. We present multi-party protocols for obliviously printing a secret in three settings: obliviously printing the contents of a ciphertext, obliviously printing a randomized message, and generating and obliviously printing a DSA/Elgamal keypair. We propose an approach to improving the legibility of message in the presence of numerous participants. Finally we propose some potential applications of oblivious printing in the context of electronic voting and digital cash.

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