Cryptology ePrint Archive: Report 2019/713

Public Ledger for Sensitive Data

Riccardo Longo and Massimiliano Sala

Abstract: Satoshi Nakamoto's Blockchain allows to build publicly verifiable and almost immutable ledgers, but sometimes privacy has to be factored in.

In this work an original protocol is presented that allows sensitive data to be stored on a ledger where its integrity may be publicly verified, but its privacy is preserved and owners can tightly manage the sharing of their information with efficient revocation.

Category / Keywords: cryptographic protocols / Privacy-Preserving Ledger, Blockchain, End to End Encryption, Sensitive Data, Revocation, Consent, Cloud, Bilinear Groups

Original Publication (with major differences): Phd Thesis, arxiv

Date: received 17 Jun 2019, last revised 9 Jul 2020

Contact author: riccardolongomath at gmail com

Available format(s): PDF | BibTeX Citation

Note: Second version with extended explanations, construction and proofs updated and generalised to asymmetric pairings, compatible with the more secure and efficient type-3 pairings, simplified and streamlined construction of the static ledger.

Version: 20200709:140214 (All versions of this report)

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