CN111259410A - Block chain private data management method - Google Patents

Abstract

The invention provides a block chain private data management method, belongs to the technical field of block chains, and aims to solve the problems that a traditional computer architecture has throughput and deployment difficulties for the application of the block chains, a traditional data acquisition mode based on cloud service cannot be realized on the block chains, and the rights and interests of data owners are easily infringed; the method comprises the steps of 1) generating a record, 2) accessing a record request, and 3) accessing a record permission revocation; the invention realizes the practical management of high throughput and encrypted data based on the block chain low throughput computer architecture and the public characteristic of data. This architecture manages and authorizes its own data by the data owner. The method not only meets the decentralized characteristic of the block chain and fully utilizes the advantages of the block chain, but also standardizes the performance and safety of data encryption, so that the deployment and application of the block chain in the actual industry become feasible.

Description

Block chain private data management method

Technical Field

The invention relates to the technical field of block chains, in particular to a block chain private data management method.

Background

In blockchain applications, whether public, private, or federated, the public attribute is the public nature of the data. The data can be obtained and detected by anyone on the chain in some technical way. The privacy of the data owner is vulnerable to violation. The traditional computer architecture has difficulty in throughput and deployment for blockchain applications and the traditional data acquisition manner based on cloud services cannot be realized on blockchains, so that effective management of blockchain private data is required.

Disclosure of Invention

In view of the technical deficiencies, the invention aims to provide a block chain private data management method, which realizes the practical management of high throughput and encrypted data based on the low throughput computer architecture of the block chain and the public characteristics of the data. This architecture manages and authorizes its own data by the data owner. The method not only meets the decentralized characteristic of the block chain and fully utilizes the advantages of the block chain, but also standardizes the performance and safety of data encryption, so that the deployment and application of the block chain in the actual industry become feasible.

In order to solve the technical problems, the invention adopts the following technical scheme:

the block chain private data management method is characterized by comprising the following steps:

1) generating records

a. The data owner generates a binary data record;

b. the data owner carries out hash operation on the binary data record obtained in the step 1) -a to obtain data record hash;

c. the data owner generates a new data symmetric key;

d. the data owner encrypts the binary data record obtained in the step 1) -a by using the data symmetric key obtained in the step 1) -c to obtain encrypted binary data;

e. the data owner stores the data record Hash obtained in 1) -b and the binary data obtained in 1) -d as a data pair into an intelligent contract;

2) accessing record requests

a. The data requester generates a public key and private key pair;

b. the data requester searches records from the intelligent contract according to the keywords and simultaneously sends the public key obtained in the step 2) -a to the intelligent contract;

c. the intelligent contract returns to the recording list;

d. the intelligent contract encrypts the data symmetric key obtained in 1) -c by using the public key obtained in 2) -a and stores the encrypted data symmetric key into the intelligent contract;

e. the data accessor obtains a record list;

f. the data accessor obtains an encrypted symmetric key by taking the public key obtained from the intelligent contract 2) -a as an index;

g. the data visitor decrypts the data in 2) -f by using the private key to obtain a symmetric key;

h. the data accessor reads the encrypted data from the intelligent contract and decrypts the encrypted data by using the symmetric key obtained from the step 2) to the step g to obtain the binary data record in the step 1) to the step a;

3) access record rights revocation

a. The data owner generates a new data symmetric key;

b. the data owner re-encrypts the binary data record obtained in 1) -a with the new data symmetric key,

obtaining new encrypted data;

c. the data owner stores the encrypted data obtained in 3) -b into the intelligent contract by the same data hash value as that of 1) -b, and original data in 1) -d are covered;

d. the data owner updates the current symmetric key of the smart contract.

The invention has the beneficial effects that: the invention realizes the practical management of high throughput and encrypted data based on the block chain low throughput computer architecture and the public characteristic of data. This architecture manages and authorizes its own data by the data owner. The method not only meets the decentralized characteristic of the block chain and fully utilizes the advantages of the block chain, but also standardizes the performance and safety of data encryption, so that the deployment and application of the block chain in the actual industry become feasible.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A block chain private data management method is applied to block chain data management of data disclosure on a terminal, and comprises the following steps:

1) generating records

a. The data owner generates a binary data record;

b. the data owner carries out hash operation on the binary data record obtained in the step 1) -a to obtain data record hash;

c. the data owner generates a new data symmetric key;

d. the data owner encrypts the binary data record obtained in the step 1) -a by using the data symmetric key obtained in the step 1) -c to obtain encrypted binary data;

e. the data owner stores the data record Hash obtained in 1) -b and the binary data obtained in 1) -d as a data pair into an intelligent contract;

2) accessing record requests

a. The data requester generates a public key and private key pair;

b. the data requester searches records from the intelligent contract according to the keywords and simultaneously sends the public key obtained in the step 2) -a to the intelligent contract;

c. the intelligent contract returns to the recording list;

d. the intelligent contract encrypts the data symmetric key obtained in 1) -c by using the public key obtained in 2) -a and stores the encrypted data symmetric key into the intelligent contract;

e. the data accessor obtains a record list;

f. the data accessor obtains an encrypted symmetric key by taking the public key obtained from the intelligent contract 2) -a as an index;

g. the data visitor decrypts the data in 2) -f by using the private key to obtain a symmetric key;

h. the data accessor reads the encrypted data from the intelligent contract and decrypts the encrypted data by using the symmetric key obtained from the step 2) to the step g to obtain the binary data record in the step 1) to the step a;

3) access record rights revocation

a. The data owner generates a new data symmetric key;

b. the data owner re-encrypts the binary data record obtained in 1) -a with the new data symmetric key,

obtaining new encrypted data;

c. the data owner stores the encrypted data obtained in 3) -b into the intelligent contract by the same data hash value as that of 1) -b, and original data in 1) -d are covered;

d. the data owner updates the current symmetric key of the intelligent contract; the access of the data visitor can be invalid, and the data symmetric key needs to be applied again.

The invention realizes the practical management of high throughput and encrypted data based on the block chain low throughput computer architecture and the public characteristic of data. This architecture manages and authorizes its own data by the data owner. The method not only meets the decentralized characteristic of the block chain and fully utilizes the advantages of the block chain, but also standardizes the performance and safety of data encryption, so that the deployment and application of the block chain in the actual industry become feasible.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (1)

1. The block chain private data management method is characterized by comprising the following steps:

1) generating records

a. The data owner generates a binary data record;

b. the data owner carries out hash operation on the binary data record obtained in the step 1) -a to obtain data record hash;

c. the data owner generates a new data symmetric key;

d. the data owner encrypts the binary data record obtained in the step 1) -a by using the data symmetric key obtained in the step 1) -c to obtain encrypted binary data;

e. the data owner stores the data record Hash obtained in 1) -b and the binary data obtained in 1) -d as a data pair into an intelligent contract;

2) accessing record requests

a. The data requester generates a public key and private key pair;

b. the data requester searches records from the intelligent contract according to the keywords and simultaneously sends the public key obtained in the step 2) -a to the intelligent contract;

c. the intelligent contract returns to the recording list;

d. the intelligent contract encrypts the data symmetric key obtained in 1) -c by using the public key obtained in 2) -a and stores the encrypted data symmetric key into the intelligent contract;

e. the data accessor obtains a record list;

f. the data accessor obtains an encrypted symmetric key by taking the public key obtained from the intelligent contract 2) -a as an index;

g. the data visitor decrypts the data in 2) -f by using the private key to obtain a symmetric key;

h. the data accessor reads the encrypted data from the intelligent contract and decrypts the encrypted data by using the symmetric key obtained from the step 2) to the step g to obtain the binary data record in the step 1) to the step a;

3) access record rights revocation

a. The data owner generates a new data symmetric key;

b. the data owner re-encrypts the binary data record obtained in the step 1) -a by using a new data symmetric key to obtain new encrypted data;

c. the data owner stores the encrypted data obtained in 3) -b into the intelligent contract by the same data hash value as that of 1) -b, and original data in 1) -d are covered;

d. the data owner updates the current symmetric key of the smart contract.