Address generation method, blockchain information processing method, and related device

Patent metadata

Field	Value
Publication number	US-12380442-B2
Application number	US-202318308786-A
Country	US
Kind code	B2
Filing date	Apr 28, 2023
Priority date	Oct 31, 2020
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

Embodiments of this disclosure disclose an address generation method which includes: a first blockchain node generates a shared key based on a private key of a first blockchain node and a first public key of a second blockchain node, generates a temporary first public key address of the second blockchain node based on the shared key and first transaction content, and writes first transaction information into a blockchain, where the first transaction information includes a public key address of the first blockchain node, the first public key address, and first transaction content between the first blockchain node and the second blockchain node; and the first public key address needs to be verified by using the shared key, and a recipient may also generate the shared key by using a public key of the first blockchain node and a first private key of the second blockchain node, to verify the transaction information.

First claim

What is claimed is:

1. An address generation method performed by a computer processor of a first blockchain node, and the method comprises:
generating a shared key based on a private key of the first blockchain node and a first public key of a second blockchain node;
generating a first public key address of the second blockchain node based on the shared key and first transaction content; and
writing first transaction information into a blockchain, wherein the first transaction information comprises a public key address of the first blockchain node, the first public key address, and the first transaction content, wherein
the first transaction content is content of a transaction between the first blockchain node and the second blockchain node, the first transaction information written into the blockchain is verifiable based on the first public key address, the first public key address is verifiable based on the shared key, and the shared key is generatable based on a public key of the first blockchain node and a first private key of the second blockchain node, and wherein
the first blockchain node and the second blockchain node each has one set of fixed keys comprising one long-term private key and one long-term public key, wherein the private key of the first blockchain node is a long-term private key of the first blockchain node in the one set of fixed keys of the first blockchain node, the first public key of the second blockchain node is a long-term public key of the second blockchain node in the one set of fixed keys of the second blockchain node, the public key of the first blockchain node is a long-term public key of the first blockchain node in the one set of fixed keys of the first blockchain node, and the first private key of the second blockchain node is a long-term private key of the second blockchain node in the one set of fixed keys of the second blockchain node; or
the first blockchain node and the second blockchain node each has two sets of fixed keys comprising a first set of fixed keys and a second set of fixed keys, the first set of fixed keys comprises one long-term private key and one long-term public key, the second set of fixed keys comprises one scanning private key and one scanning public key, the private key of the first blockchain node is a long-term private key of the first blockchain node in the first set of keys of the first blockchain node, the first public key of the second blockchain node is a scanning public key of the second blockchain node in the second set of keys of the second blockchain node, the public key of the first blockchain node is a long-term public key of the first blockchain node in the first set of keys of the first blockchain node, and the first private key of the second blockchain node is a scanning private key of the second blockchain node in the second set of keys of the second blockchain node.

2. The method according to claim 1 , wherein the generating a first public key address of the second blockchain node based on the shared key and first transaction content comprises:
generating a second private key based on the shared key and the first transaction content; and
generating the first public key address based on the second private key and a second public key of the second blockchain node.

3. The method according to claim 2 , wherein the generating a second private key based on the shared key and the first transaction content comprises:
combining the shared key and the first transaction content to obtain a first combination result; and
performing a hash operation on the first combination result to generate the second private key.

4. The method according to claim 2 , wherein the generating the first public key address based on the second private key and a second public key of the second blockchain node comprises:
generating a third public key based on the second private key and the second public key of the second blockchain node in an elliptic curve public key cryptosystem, and generating the first public key address based on the third public key; or
generating a third public key based on the second private key and the second public key of the second blockchain node in a discrete logarithm public key cryptosystem, and generating the first public key address based on the third public key.

5. The method according to claim 1 , wherein the generating a shared key based on a private key of the first blockchain node and a first public key of a second blockchain node comprises:
performing dot product multiplication on the private key of the first blockchain node and the first public key of the second blockchain node in the elliptic curve public key cryptosystem, to obtain the shared key; or
performing an exponential operation based on the private key of the first blockchain node and the first public key of the second blockchain node in the discrete logarithm public key cryptosystem, to obtain the shared key, wherein the first public key of the second blockchain node is a base in the exponential operation, and the private key of the first blockchain node is an exponent in the exponential operation.

6. A blockchain information processing method performed by a second blockchain node, and the method comprises:
generating a shared key based on a public key of a first blockchain node and a first private key of the second blockchain node;
reading at least one piece of transaction information on a blockchain; and
when determining that first transaction information exists in the at least one piece of transaction information, determining that a transaction indicated by first transaction content is a successful transaction, wherein the first transaction information comprises a public key address of the first blockchain node, the first transaction content, and a first public key address of the second blockchain node, wherein
the first transaction content is content of a transaction between the first blockchain node and the second blockchain node, and the first public key address is generated based on the shared key and the first transaction content, and wherein
the first blockchain node and the second blockchain node each has one set of fixed keys comprising one long-term private key and one long-term public key, wherein the public key of the first blockchain node is a long-term public key of the first blockchain node in the one set of fixed keys of the first blockchain node, and the first private key of the second blockchain node is a long-term private key of the second blockchain node in the one set of fixed keys of the second blockchain node; or
the first blockchain node and the second blockchain node each has two sets of fixed keys comprising a first set of fixed keys and a second set of fixed keys, the first set of fixed keys comprises one long-term private key and one long-term public key, the second set of fixed keys comprises one scanning private key and one scanning public key, the public key of the first blockchain node is a long-term public key of the first blockchain node in the first set of keys of the first blockchain node, and the first private key of the second blockchain node is a scanning private key of the second blockchain node in the second set of keys of the second blockchain node.

7. The method according to claim 6 , wherein the generating a shared key based on a public key of a first blockchain node and a first private key of the second blockchain node comprises:
performing dot product multiplication on the public key of the first blockchain node and the first private key of the second blockchain node in an elliptic curve public key cryptosystem to obtain the shared key; or
performing an exponential operation based on the public key of the first blockchain node and the first private key of the second blockch

Assignees

• Huawei Tech Co Ltd

Inventors

• Kang Xin
• Yang Yanjiang
• Wang Haiguang

Classifications

• H04L9/0861 Primary

  Generation of secret information including derivation or calculation of cryptographic keys or passwords · CPC title

• H04L9/50

  using hash chains, e.g. blockchains or hash trees · CPC title

• H04L9/0841

  involving Diffie-Hellman or related key agreement protocols · CPC title

• G06Q20/3827

  Use of message hashing · CPC title

• G06Q20/02

  involving a neutral party, e.g. certification authority, notary or trusted third party [TTP] · CPC title