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Rewritable blockchain

  • US 10,348,707 B2
  • Filed: 05/04/2018
  • Issued: 07/09/2019
  • Est. Priority Date: 05/23/2016
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a memory configured to store a data-tamper-protected blockchain,the data-tamper-protected blockchain including multiple blocks, each of the multiple blocks data-tamper-protected by a respective integrity output stored within the data-tamper-protected blockchain, the multiple blocks including;

    a subsequent block and a previous block,the previous block including;

    a previous transaction record, anda previous integrity output, andthe subsequent block including;

    a subsequent transaction record, andthe respective integrity output for the previous block; and

    rewrite circuitry configured to perform, on behalf of a trusted party and without altering the respective integrity output for the previous block, a validity-preserving rewrite to the previous block of the data-tamper-protected blockchain using a key secret controlled by the trusted party.

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