Cryptology ePrint Archive: Report 2016/508

Collapse-binding quantum commitments without random oracles

Dominique Unruh

Abstract: We construct collapse-binding commitments in the standard model. Collapse-binding commitments were introduced by Unruh (Eurocrypt 2016) to model the computational-binding property of commitments against quantum adversaries, but only constructions in the random oracle model were known.

Furthermore, we show that collapse-binding commitments imply selected other security definitions for quantum commitments, answering an open question by Unruh (Eurocrypt 2016).

Category / Keywords: cryptographic protocols / Quantum cryptography, commitments, hash functions

Original Publication (with major differences): IACR-ASIACRYPT-2016

Date: received 23 May 2016, last revised 23 Aug 2016

Contact author: unruh at ut ee

Available format(s): PDF | BibTeX Citation

Note: Minor changes following suggestions from the Asiacrypt 2016 reviewers.

Version: 20160823:080658 (All versions of this report)

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