Block chain key trusteeship and recovery method and device based on secrecy sharing technology
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A secret sharing and key recovery technology, applied in the blockchain field, can solve problems such as low security, user key loss, and difficult recovery, and achieve the effects of improving reliability, backup and recovery security, and intrusion tolerance
Inactive Publication Date: 2018-01-23
JUZIX TECH SHENZHEN CO LTD
View PDF8 Cites 129 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0006] The purpose of the present invention is to provide a blockchain key escrow and recovery method based on secret sharing technology to solve the problem of low security in the prior art, difficult recovery of user key loss, or due to the need to retrieve the private key. In the storage process, it brings new security problems
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
example 1
[0041] The key recovery scheme is divided into the release phase and the key recovery phase. Considering the identity of any common user node in the system, the detailed process is as follows:
[0042] Publishing stage: the user disperses and stores the encrypted private key ciphertext group and the public key information formed by the user's biological information and / or password in the blockchain to host the encrypted private key. The specific process is as follows: image 3 :
[0043] 1. The user generates a public-private key pair on the elliptic curve (sk 1 , pk 1 )=(x, x·G), where G is the generator. Of course, other existing algorithms can also be used to generate the public-private key pair.
[0044] 2. will sk 1 For (t, n) secret sharing, decomposed into sk 1 →(sk 1 1 ,sk 1 2 ,...,sk 1 n ), where 1≤t≤n, that is, sk 1 Split the shared secret into n fragments, and use any t or more shared fragments to restore sk 1 ;
[0045] 3. The user uses his biometric...
example 2
[0057] Publishing stage: the user stores the encrypted private key ciphertext group and the public key information formed by the user's biological information and / or password in the trusted node to host the encrypted private key. Any node can be pre-defined in the blockchain system.
[0058] 1. The user generates a public-private key pair on the elliptic curve (sk 1 , pk 1 )=(x, x·G), where G is the generator. Of course, other existing algorithms can also be used to generate the public-private key pair.
[0059] 2. will sk 1 For (t, n) secret sharing, decomposed into sk 1 →(sk 1 1 ,sk 1 2 ,...,sk 1 n ), where 1≤t≤n, that is, sk 1 Split the shared secret into n fragments, and use any t or more shared fragments to restore sk 1 ;
[0060] 3. The user uses his biometric feature B (which may include fingerprints, iris, palm veins, face shape, etc.), and uses an existing fuzzy extractor or other existing algorithms to generate parameter public parameters P and secret pa...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention discloses a block chain key trusteeship and recovery method and device based on a secrecy sharing technology. The method comprises the steps that A1, a user groups a private key sk1 in a(t, n) secrecy sharing mode, wherein the n is the number of fragments of shared secrecies obtained by splitting the private key, the t is the minimum number of the fragments for recovery of the private key, and the t is greater than or equal to 2 and is smaller than or equal to the n; A2, information containing user identification information is taken as a private key protection key, and then grouping encryption is carried out on the private key through utilization of the key; and A3, secrecy string information containing encrypted ciphertexts is dispersely stored to a block chain or is sentto trusted nodes for trusteeship and storage, when the user discovers that own private key is lost, a key recovery request is generated, at least t secrecy strings are obtained from the trusted nodesor the block chain in a secrecy string storage mode of the key, and the content in the secrecy strings is extracted, decrypted and recombined, so the private key is recovered. According to the methodand the device, the secrecy sharing technology is applied to a block chain scene for the first time, thereby solving the private key trusteeship and recovery security problem.
Description
technical field [0001] The present invention relates to block chain technology, in particular to a block chain key trusteeship and recovery method and device that use secret sharing technology to improve key management in existing block chain technology. Background technique [0002] Blockchain technology is a decentralized distributed ledger technology originated from Bitcoin. It facilitates transactions through technical endorsement rather than centralized credit institutions. It has the characteristics of decentralization, no need for central trust, tamper-proof and encrypted security. Nodes, as participants in the blockchain system, each maintain a copy of the data. The nodes maintain the consistency of the backup database data through the consensus algorithm. Each account in the blockchain system consists of an address (public key) and a private key. The user controls the assets in the account by using the private key. The private key is the only data that proves the ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more