Absstract of: US2023036817A1

A detecting device includes: a verification information acquiring unit (400) configured to acquire second verification information about block data recorded in a central server that generates and distributes block data configuring a block chain and first verification information about block data recorded in a plurality of participant servers that record the distributed block data in a ledger of each of the plurality of participant servers; and a comparison unit (401) configured to determine the presence or absence of tampering of the block data in the central server by comparing the first verification information with the second verification information.

Absstract of: WO2023005309A1

A blockchain-based product information processing method, and a computer-readable storage medium. The method comprises: during a product manufacturing process, generating, by using a trusted node, digital certificates which correspond to products on a one-to-one basis, recording the digital certificates on the products, and publishing initial trusted data of the products on a blockchain; during a product circulation process, acquiring, by using circulation nodes, the digital certificates recorded on the products and generating circulation information, and binding the circulation information and the digital certificates and then broadcasting same on the blockchain; nodes on the blockchain verifying, by using information of the products that has been recorded on the blockchain, data which is broadcast by the circulation nodes; and after reaching a consensus on a verification result, the nodes on the blockchain publishing, on the blockchain, data published by the circulation nodes, such that other trusted nodes can query the data. The source tracing of the entire circulation process of products can be realized, thereby fundamentally eliminating the possibility of counterfeiting.

Absstract of: WO2023005500A1

The present application relates to the technical field of blockchains, and discloses a cross-chain transaction processing method and apparatus, an electronic device, and a storage medium. The method comprises: receiving (201) a cross-chain transaction request of a terminal; running (202) a first service contract on a first blockchain on the basis of the cross-chain transaction request; executing (203) a first transaction event of a cross-chain transaction on the first blockchain by means of the first service contract, running a first cross-chain contract on the first blockchain, and determining to execute a second transaction event of the cross-chain transaction on a second blockchain; storing (204) first cross-chain transaction data on the first blockchain by means of the first service contract; acquiring second cross-chain transaction data from the second blockchain; and sending (205) a transaction completion response to the terminal by means of the first service contract and the first cross-chain contract.

Absstract of: EP4125018A1

A blockchain network (114) for supporting net settlement of transactions is described. The blockchain network comprises a plurality of blocks, each block including one or more blockchain transactions. Each of the one or more blockchain transactions corresponds to a payment transaction, wherein each of the one or more blockchain transactions comprises an encrypted promissory note including at least a transaction amount and a wrapped symmetric key comprising a symmetric encryption key used to encrypt the encrypted promissory note wrapped by a public key of an acquirer of the payment transaction. Each blockchain transaction is stored at a blockchain address associated with the acquirer (106) of the corresponding payment transaction, the blockchain network (114) thereby being adapted for the acquirer (106) to perform net settlement of payment transactions posted to its blockchain address. A method of net settlement by an acquirer (106) using such a blockchain network is also described.

Absstract of: GB2609186A

Methods of transmitting information from a first node to a second node of a blockchain are provided. The first node receives a transaction referencing an object, such as coins, goods or documents, and also referencing a containing set, such as a wallet, inventory or document pool of the blockchain. An existing instance the object and the containing set is determined and updated, and the updated instance is transmitting to the second node. The object and container set are associated with a persistent identifier, with the existing instance being a most recent instance associated with the persistent identifier. A blockchain is queried by referencing one or more of a transaction, an object, a containing set, a block, an object attribute, time interval or a block range. The blockchain may be used to record and/or query provenance information.

Absstract of: GB2609193A

A computer-implemented method of enforcing conditions on a second blockchain transaction using a first blockchain transaction, wherein a first one of the conditions is that, when a first unlocking script of the second transaction is executed alongside a first locking script of the first transaction, a representation of the second transaction is output to memory, wherein the representation is based on a plurality of fields of the second transaction and a first output of the first transaction, and wherein the method comprises: generating the first transaction, wherein the first transaction comprises a first output, wherein the first output comprises the first locking script, and wherein the first locking script comprises: a message sub-script; a signature sub-script; a public key corresponding to a private key; and a verification sub-script. A signature sub-script configured to, when executed, generate a signature, wherein the signature is a function of at least the candidate message, a private key, and an ephemeral private key, and wherein the ephemeral private key is fixed by the first locking script as being equal to one and/or wherein the ephemeral private key is fixed as being equal to the private key.

Absstract of: GB2609194A

A computer-implemented method of enforcing conditions on a second blockchain transaction using a first blockchain transaction, wherein a first one of the conditions is that, when a first unlocking script of the second transaction is executed alongside a first locking script of the first transaction, a representation of the second transaction is output to memory, wherein the representation is based on a plurality of fields of the second transaction and a first output of the first transaction, and wherein the method comprises: generating the first transaction, wherein the first transaction comprises a first output, wherein the first output comprises the first locking script, and wherein the first locking script comprises: a message sub-script; a signature sub-script; a public key corresponding to a private key; and a verification sub-script. The message sub-script is configured to generate one or more respective parts of the candidate message based on a respective set of the candidate fields, and to re-use at least one of the respective sets of candidate fields as a different respective part of the candidate message.

Absstract of: GB2609275A

A computer system executable on a cloud environment for managing a large-scale construction project. In an embodiment, the project adopts New Engineering Contract for stimulating collaborations between project parties. The system includes a gateway device 310 and an incident-based common data environment (CDE) 320. The gateway device is configured to receive documents and correspondences from the parties. The CDE includes a numbering module 400 for registering the documents and correspondences based on a primary incident 331. The numbering module generates a document code for each document or correspondence. The document code is formed by at least a document type reference defining a nature of the document or correspondence; an incident reference defining a workflow based on the primary incident; and a sequential suffix. In an embodiment, the CDE comprises a blockchain network 340 and the gateway device generates a new block 341A for each document or correspondence received, preferably with the document code in the block header.

Absstract of: KR20230014617A

농산물 유통의 안정성 제고를 위한 블록체인 및 AI 가격 예측 기반 농산물 선도거래 시스템, 방법, 및 상기 방법을 수행하기 위한 컴퓨터 판독 가능한 프로그램을 기록한 기록 매체가 개시된다. 농산물 선도거래 시스템은 생산자 정보 입력부, 유통인 정보 입력부, 생산계획 정보 입력부, 생산계획 정보 제공부, 통신 연결부, 및 전자계약서 작성부를 포함한다. 생산자 정보 입력부는 농산물의 생산자의 정보를 입력받고, 유통인 정보 입력부는 농산물의 유통인의 정보를 입력받고, 생산계획 정보 입력부는 생산자에 대응하는 농산물의 생산계획 정보를 입력받고, 생산계획 정보 제공부는 생산계획 정보를 유통인의 단말로 제공하고, 통신 연결부는 생산자와 유통인 사이에 통신 연결을 수행하며, 전자계약서 작성부는 생산자와 유통인 사이의 전자계약서를 작성하고 전자서명을 수행한다.

Absstract of: KR20230014416A

본 발명은 디지털컨텐츠의 투명한거래를 제공하는 블록체인 기반의 토큰관리방법에 관한 것으로, 제1 암호화폐를 소유한 사용자에 의한 제1 암호화폐의 제2 암호화폐로의 교환 요청에 대응하여 제1 블록체인으로 하여금 교환 요청된 제1 암호화폐의 소유권이 사용자로부터 토큰 관리 서버로 이전되도록 하며, 교환 요청된 제1 암호화폐에 대응되는 제2 암호화폐를 발행하고, 제2 블록체인으로 하여금 발행된 제2 암호화폐의 소유권이 토큰 관리 서버로부터 사용자로 이전되도록 하며, 제2 암호화폐를 소유한 사용자에 의한 제2 암호화폐의 제1 암호화폐로의 교환 요청에 대응하여 제2 블록체인으로 하여금 교환 요청된 제2 암호화폐의 소유권이 사용자로부터 토큰 관리 서버로 이전되도록 하며, 교환 요청된 제2 암호화폐를 폐기하고, 제1 블록체인으로 하여금 폐기된 제2 암호화폐에 대응되는 제1 암호화폐의 소유권이 토큰 관리 서버로부터 사용자로 이전되도록 하는 것이다.

Absstract of: US2023023060A1

A computer-implemented method of pseudo-randomly selecting game elements for use in playing a game. An oracle obtains: a set of seed data items, the set of seed data items comprises one or more user seed data items generated by a respective user; a sequence of public keys; and a list of game elements. A total number of public keys corresponds to a total number of game elements. The oracle generates a first output of a game transaction. The first output comprises the sequence of public keys and a script configured to generate at least one pseudorandom number based on the set of seed data items. The script is configured to generate a list of the public keys based on the at least one pseudorandom number. An order of public keys in the list of public keys differs compared to an order of public keys in the sequence of public keys.

Absstract of: US2023026665A1

Techniques are disclosed which include receiving, by a central entity computer, a request for digital currency. The request includes a serial number and a denomination of a physical currency. The central entity computer generates the digital currency for the denomination and linked to the serial number. The generating includes recording the digital currency on a blockchain. The central entity computer transmits a notification of the generation of the digital currency. The central entity computer causes removal of the physical currency from circulation in a fiat currency system.

Absstract of: US2023026873A1

Described herein are systems and methods for providing the secure transfer of assets between blockchain networks. The system can include a storage device that can store a bridge program that is programmed to perform (i) lock operations that lock native assets from a first blockchain network and mint synthetic assets representing the native assets in a second blockchain network, and (ii) unlock operations that unlock the native assets by transferring the native assets to an address in the first blockchain network in response to the synthetic assets being returned or destroyed. The system can include a computer system that loads and executes the bridge program in a secure computing enclave that provides a trusted execution environment. The computer system can then perform the lock operations and the unlock operations to provide a bridge between the first blockchain network and the second blockchain network.

Absstract of: US2023028324A1

A system for transacting in an environment with intermittent connectivity via a network backbone to a blockchain. A merchant device transmits a set of credentials for an ad hoc network to a buyer device and establishes a private peer-to-peer ad hoc network connection with the buyer device. It then conducts a transaction with the buyer device via the private peer-to-peer ad hoc network. If no network connection is available to a transaction blockchain, the merchant device stores a record of the transaction until such network becomes available and later sends the record of the transaction to the transaction blockchain.

Absstract of: US2023028089A1

Decentralized computer systems and methods are disclosed for efficient transaction dispute management using blockchain. One method includes: receiving transaction information of a transaction, wherein the transaction information includes (1) an identifier of an issuer of a payment source account, (2) an identifier of an acquirer of a payment account of a merchant, and (3) the amount of resources to be applied in the transaction; generating a blockchain entry that stores the received transaction information in a shared ledger to participants of the blockchain; receiving in the shared ledger, from a participant, (1) an indication of a dispute of the transaction information, and (2) a proposed change to the transaction information; prompting the participants of the blockchain to respond to the indication of the dispute; if one of the participants denies the proposed change, executing a dispute settlement process to determine a revised transaction information.

Absstract of: US2023028704A1

Techniques for certifying a document and for securely transmitting access to the document across a blockchain network are disclosed. A document, which details results of a soft inquiry executed against a user's credit history, is accessed. A hash algorithm is applied to the document to certify it. The hash algorithm is based on a timestamp indicating when the document was created. Applying the hash algorithm also generates a portable identifier reflecting the document is certified at the time indicated by the timestamp. The portable identifier is added as a record to a blockchain. The record is transmitted to a second computer system using public and private keys.

Absstract of: US2023028681A1

Techniques are described for receiving an online request to verify an asset, e.g., a line-item from an online profile. The technique determines a verifying entity, such as an educational institution, that has authority to verify the line-item, e.g., an earned certificate, and sends a request to such verifying entity to do so. The asset is added to and verified on the distributed ledger or is verified before adding to the distributed ledger. A verification indicator is coupled to the asset, signaling that the asset has been verified once and need not be verified again. A notification that the asset is verified is transmitted to interested parties. The verification may be at a level, such as a one day verification of a negative drug test. The verifications are searchable on the distributed ledger, e.g., an employer may query for verified assets that match job-related requirements.

Absstract of: US2023029193A1

A composite cryptographic data structure is described, and corresponding methods, systems, and computer readable media. The composite cryptographic data structure is instantiated based on an underlying set of cryptographic tokens (e.g., blockchain/distributed ledger tokens) that, in some embodiments, are transferrable through on-chain transactions established on one or more distributed ledger networks. Identity validation, in some embodiments, may occur at one of composite cryptographic data structure instantiation or composite cryptographic data structure redemption, or both, through the use of a whitelist or a blacklist data structure.

Absstract of: US2023028854A1

Systems and methods of cryptographic key distribution in a plurality of networks, including: sharing, by a first device, a first portion of a first cryptographic key controlled by a server with a second device, sharing, by the second device, a first portion of a second cryptographic key with the first device, signing a first transaction on a first network with data exchange from a first threshold signature address controlled by the first device, to a third address when one or more details of the first transaction are validated by the server; and signing a second transaction on a second network with data exchange from the second threshold signature address controlled by the second device to a fourth address when one or more details of the second transaction are validated by the server.

Absstract of: WO2023002640A1

Provided is a fully distributed blockchain system for preventing an illegal activity or tax evasion using crypto assets. This blockchain system enables a participant to select registration of personal information, discloses only the information necessary for calculating the amount of tax payment without disclosing to the public all the registered personal information of the participant when the participant registers the personal information for transaction, and enables execution of basic operations such as mining and remittance while disabling reception of crypto assets from other users when the participant does not register the personal information.

Absstract of: WO2023001844A1

The invention relates to a method for validating the signature of an electronic document (1) by means of a blockchain, which method includes: creating a signature certificate from an item of identity data of the signatory (2); storing the public key of this certificate or related information in a digital vault (5) of said signatory, which also comprises a digital fingerprint related to the identity data of said signatory; then, when the signatory (2) signs a document (1) and sends it to a user (20): extracting the certificate embedded in the document (1); authenticating the signatory (2) by comparison between a digital fingerprint calculated from identity data communicated by the signatory (2) and that which is stored in said vault; validating the public key of the signatory (2) by comparison between the key or related information extracted from the document (1) and that which is stored in the vault (5).

Absstract of: WO2023001846A1

The invention relates to a method for enabling an organisation (1) to perform transactions with an establishment (2) via a blockchain, which includes: creating a shared digital vault (19); storing respective digital addresses (13, 14) of said organisation and said establishment in this vault (19); then, when the organisation (1) sends data to perform a transaction with the establishment (2): said organisation storing an electronic certificate corresponding to said transaction data in the vault (19), as well as a status related to an operational functionality performed by the organisation (1) on said certificate; and when one of the organisation (1) and/or the establishment (2) performs an operational functionality on said certificate: storing (49, 52) in the vault (19) a status related to said operational functionality; sending an adapted notification (50, 53) to the other of said organisation and/or said establishment.

Absstract of: WO2023001845A1

The invention relates to a method for enrolling a user (1) by an organisation on a blockchain, said method including: the user (1) communicating identity data to a platform (2) of said organisation, as well as a digital address (3) of a digital vault (4) held by said user; said platform authenticating said user by comparison between the identity data communicated by said user and a digital fingerprint of said user stored in said vault; then, when the user (1) communicates electronic documents (16a, 16b, 16c) in order to finalise their enrolment: storing fingerprints of said electronic documents in a digital enrolment vault (18) held by the organisation on the blockchain; sending said documents to the platform (2) of the organisation, in order to allow said documents to be verified by comparison with their fingerprints stored in said enrolment vault.

Absstract of: WO2023001461A1

A computer-implemented method of enforcing conditions on a second blockchain transaction using a first blockchain transaction, wherein a first one of the conditions is that, when a first unlocking script of the second transaction is executed alongside a first locking script of the first transaction, a representation of the second transaction is output to memory, wherein the representation is based on a plurality of fields of the second transaction and a first output of the first transaction, and wherein the method comprises: generating the first transaction, wherein the first transaction comprises a first output, wherein the first output comprises the first locking script, and wherein the first locking script comprises: a message sub-script; a signature sub-script; a public key corresponding to a private key; and a verification sub-script.

Absstract of: WO2023001460A1

A computer-implemented method of enforcing conditions on a second blockchain transaction using a first blockchain transaction, wherein a first one of the conditions is that, when a first unlocking script of the second transaction is executed alongside a first locking script of the first transaction, a representation of the second transaction is output to memory, wherein the representation is based on a plurality of fields of the second transaction and a first output of the first transaction, and wherein the method comprises: generating the first transaction, wherein the first transaction comprises a first output, wherein the first output comprises the first locking script, and wherein the first locking script comprises: a message sub-script; a signature sub-script; a public key corresponding to a private key; and a verification sub-script.