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Secure re-use of private key for dynamic group of nodes

A private key and group technology, applied in secure communication devices, data processing applications, user identity/authority verification, etc., can solve problems such as attacks

Pending Publication Date: 2019-11-22
NCHAIN HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Extended feature sets that rely on blockchains can be exploited by malicious parties

Method used

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  • Secure re-use of private key for dynamic group of nodes
  • Secure re-use of private key for dynamic group of nodes
  • Secure re-use of private key for dynamic group of nodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] blockchain network

[0036] first reference figure 1 . figure 1 An exemplary blockchain network 100 associated with a blockchain is shown in block diagram form. A blockchain network can be a public blockchain network, which is a peer-to-peer open membership network in which anyone can join without invitation or consent from other members. Distributed electronic devices running instances of the blockchain protocol under which the blockchain network 100 operates may participate in the blockchain network 100 . Such distributed electronic devices may be referred to as nodes 102 . The blockchain protocol can be, for example, the Bitcoin protocol.

[0037] The electronic devices that run the blockchain protocol and form the nodes 102 of the blockchain network 100 can be various types of devices including, for example, desktop computers, laptop computers, tablet computers, servers, mobile devices such as smart phones, such as Wearable computers like smart watches, or othe...

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Abstract

There may be provided a computer-implemented method. The computer-implemented method includes: i) broadcasting, by a node in a blockchain network (such as, for example, the Bitcoin network), a transaction to transfer one or more digital assets to a public group address associated with a congress public key, the public group being associated with one or more other digital assets associated with other members of a congress; ii) generating a private key share to be used in a threshold signature scheme in which at least a threshold of private key shares must be used to generate a valid signature through combination of partial signatures on behalf of the congress, and wherein other holders of the private key shares are the other members of the congress who have joined the congress by transfer of respective digital assets to the public group address; and iii) using the private key share to cooperatively generate a valid signature for a transaction from the public group address.

Description

technical field [0001] The present invention relates generally to distributed ledgers, and more particularly to methods and systems for providing decentralized control over digital assets associated with digital ledgers. The present invention is particularly suitable for realizing two-way anchoring between a proof-of-work blockchain network and a proof-of-stake blockchain network, but is not limited thereto. Background technique [0002] In this document, we use the term "blockchain" to include all forms of electronic, computer-based distributed ledgers. They include blockchain and transaction chain technologies, permissioned and permissionless ledgers, shared ledgers and their variants. The most widely known application of blockchain technology is the Bitcoin ledger, but other blockchain implementations have also been proposed and developed. While reference to Bitcoin may be made herein for convenience and illustrative purposes, it should be noted that the present inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q20/06G06Q20/36G06Q20/38H04L9/32G06F21/64
CPCG06F21/64G06Q20/065G06Q20/36G06Q20/3829G06Q20/389H04L2209/56H04L9/3239H04L9/3247H04L9/3255H04L9/50G06Q2220/00H04L9/0637H04L9/0825H04L9/0833H04L9/3252H04L2209/463H04L9/0618
Inventor J·弗莱彻T·特维森
Owner NCHAIN HLDG LTD
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