Cryptology ePrint Archive: Report 2020/1191

Schrödinger's Pirate: How To Trace a Quantum Decoder

Mark Zhandry

Abstract: We explore the problem of traitor tracing where the pirate decoder can contain a quantum state. Our main results include: - We show how to overcome numerous definitional challenges to give a meaningful notion of tracing for quantum decoders - We give negative results, demonstrating barriers to adapting classical tracing algorithms to the quantum decoder setting. - On the other hand, we show how to trace quantum decoders in the setting of (public key) private linear broadcast encryption, capturing a common approach to traitor tracing.

Category / Keywords: foundations / Quantum, Traitor Tracing

Original Publication (with minor differences): IACR-TCC-2020

Date: received 29 Sep 2020

Contact author: mzhandry at gmail com

Available format(s): PDF | BibTeX Citation

Version: 20200930:075101 (All versions of this report)

Short URL: ia.cr/2020/1191