Multiple-link Blockchain


A 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.

CPC Classifications
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Document History
  • Publication: Oct 10, 2017
  • Application: May 16, 2017
    US US 201715596922 A
  • Priority: Feb 17, 2017
    EP EP 17425018 A
  • Priority: Aug 11, 2016
    EP EP 16425086 A
  • Priority: May 23, 2016
    EP EP 16425044 A

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