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1. (WO2017202758) MULTIPLE-LINK CRYPTOLOGIC BLOCKCHAIN

Pub. No.:    WO/2017/202758    International Application No.:    PCT/EP2017/062242
Publication Date: Fri Dec 01 00:59:59 CET 2017 International Filing Date: Wed May 24 01:59:59 CEST 2017
IPC: H04L 9/32
Applicants: ACCENTURE GLOBAL SOLUTIONS LIMITED
GSC SECRYPT, LLC
Inventors: ATENIESE, Giuseppe
CHIARAMONTE, Michael T.
TREAT, David
MAGRI, Bernardo
VENTURI, Daniele
Title: MULTIPLE-LINK CRYPTOLOGIC BLOCKCHAIN
Abstract:
A cryptologic system includes circuitry for rewriting blockchains in a non-tamper-evident or tamper-evident operation using a key secret held by a trusted party. The blockchains may include a series of blocks secured by multiple integrity codes that may prevent non-tamper-evident rewrites by non-trusted parties that are not in possession of the key secret. In some cases, the key may allow valid but tamper-evident rewrites of the blockchain by trusted entities. Further, in some implementations, tamper-evident rewrites may be converted to non-tamper-evident rewrites through multiple-party ratification.