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1. (WO2017202757) DISTRIBUTED KEY SECRET FOR CRYPTOLOGIC REWRITABLE BLOCKCHAIN

Pub. No.:    WO/2017/202757    International Application No.:    PCT/EP2017/062241
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: DISTRIBUTED KEY SECRET FOR CRYPTOLOGIC REWRITABLE BLOCKCHAIN
Abstract:
A cryptologic system includes circuitry for rewriting blockchains in a non-tamper-evident or tamper-evident operation using a key secret held in portions by multiple individually untrusted parties. The blockchains may include a series of blocks secured by integrity codes that may prevent non-tamper-evident rewrites by non-trusted parties that are not in possession of the key secret or individually-untrusted parties in possession of only a portion of the key secret. In some cases, multiple individually-untrusted parties may combine their portions into the key secret. As a group, the multiple individually-untrusted parties may perform non-tamper-evident operation with respect to at least one integrity code within the blockchain.