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21. 发明申请

WO2021213920A1 METHOD FOR IMPLEMENTING A DIGITAL COIN SYSTEM USING A BLOCKCHAIN 审中-公开
公开(公告)号：WO2021213920A1
公开(公告)日：2021-10-28
申请号：PCT/EP2021/059929
申请日：2021-04-16
申请人： NCHAIN LICENSING AG
发明人： PETTIT, Michaella , WRIGHT, Craig Steven
IPC分类号： H04L9/32
摘要： A computer-implemented method for implementing a system for issuing digital coins using a blockchain, wherein each digital coin is issued by an issuing party and represents an amount of an asset redeemable by a redeeming party in exchange for the digital coin, wherein the issuing party maintains a record of coin serial numbers, each coin serial number representing a respective digital coin; the method being performed by the issuing party and comprising: obtaining a spending transaction comprising a first one of a set of coin serial numbers; determining whether the first coin serial number is present in the database; and in response to one or more conditions being met, transferring the amount of the asset represented by the first coin serial number to the redeeming party, wherein a first one of the conditions is that the first coin serial number is not present in the database.

22. 发明申请

WO2021198532A1 METHODS AND DEVICES FOR DOUBLE-SPEND RELAY IN A BLOCKCHAIN NETWORK 审中-公开
公开(公告)号：WO2021198532A1
公开(公告)日：2021-10-07
申请号：PCT/EP2021/058933
申请日：2021-04-06
申请人： NCHAIN LICENSING AG
发明人： COUGHLAN, Steven, Patrick
IPC分类号： G06Q20/02 , G06Q20/06 , G06Q20/10 , G06Q20/22 , G06Q20/36 , G06Q20/38 , G06Q20/40 , G06Q20/065 , G06Q20/223 , G06Q20/3678 , G06Q20/382 , G06Q20/3825 , G06Q20/3827 , G06Q20/3829 , G06Q20/389 , G06Q20/401 , G06Q20/405
摘要： Methods and systems for relaying double-spend transactions in a blockchain network. A mining node that detects a potential double-spend may send a notification regarding the attempt. Nodes in the network may retrieve transaction data regarding the two transactions involved and verify whether the double-spend identified in the notification is valid or not. The notification may be signed by the mining node using a miner ID, and invalid notifications may have negative impact on an associated reputation score in some cases. A repudiation notice may be generated by a node that determines that a double-spend notification is invalid.

23. 发明申请

WO2023046779A1 BLOCKCHAIN BASED TRANSACTION PROTOCOL 审中-公开
公开(公告)号：WO2023046779A1
公开(公告)日：2023-03-30
申请号：PCT/EP2022/076270
申请日：2022-09-21
申请人： NCHAIN LICENSING AG
发明人： MEE, Andrew James
IPC分类号： H04L9/00 , H04L9/32 , H04L9/40
摘要： The present disclosure proposes methods, devices and systems for processing a transaction between a customer (100) and a merchant (130). The method may be performed at a merchant device. The method may comprise receiving customer information from a customer device associated with the customer; establishing a secure communication channel (125) between the customer and the merchant based on the customer information; generating a partial invoice transaction based on the customer information; sending the partial invoice transaction to the customer device via the secure communication channel; receiving via the secure communication channel, a transaction which is a completed version of the partial invoice transaction and which has been authorised at the customer device; validating the transaction; broadcasting the validated transaction to a blockchain node (150) to be submitted to a blockchain (155); receiving at least one notification that the transaction has been validated by the blockchain node and included on the blockchain.

24. 发明申请

WO2023046312A1 METHODS AND SYSTEMS FOR CONFIDENTIAL RECORDING OF VERIFIABLE LINKED EVENT DATA 审中-公开
公开(公告)号：WO2023046312A1
公开(公告)日：2023-03-30
申请号：PCT/EP2021/082668
申请日：2021-11-23
申请人： NCHAIN LICENSING AG
发明人： ZHANG, Wei
IPC分类号： H04L9/32 , H04L9/00
摘要： Methods and computing devices for privately and confidentially recording linked event records in a manner that ensures immutability and auditability. An event is recorded through the creation of an event string or record and the hashing of that event string or record together with an event hash relating to the previous most-recently recorded event record relating to the same entity or account. The new event hash is recorded on a blockchain to ensure immutability of the underlying preimage containing the event data. Links between event records are only discernable through examining confidentially stored preimages, and preimages can be authenticated through confirming the corresponding event hash is recorded on-chain.

25. 发明申请

WO2023041270A1 GENERATING BLOCKCHAIN TRANSACTIONS 审中-公开
公开(公告)号：WO2023041270A1
公开(公告)日：2023-03-23
申请号：PCT/EP2022/072787
申请日：2022-08-15
申请人： NCHAIN LICENSING AG
发明人： AMMAR, Bassem , WRIGHT, Craig, Steven
IPC分类号： H04L9/32 , H04L9/00 , H04L9/40
摘要： A computer-implemented method of generating a blockchain transaction, wherein each party of a plurality of second parties has a respective secret number k from which a respective r-portion is derivable, wherein a Merkle tree is defined, at least one leaf node of the Merkle tree being based on at least one of the respective r-portions, wherein the method is performed by a first party and comprises: generating a first blockchain transaction, wherein the first blockchain transaction comprises a first locking script comprising a target Merkle tree portion corresponding to the Merkle tree, the first locking script configured, when executed together with a first unlocking script of a second blockchain transaction, to: extract an r-portion from the first unlocking script, generate a hash value derived from the extracted r-portion, calculate a candidate Merkle tree portion based on the generated hash and a Merkle proof portion of the first unlocking script, verify that the calculated candidate Merkle tree portion matches the target Merkle tree portion, verify a signature portion of the first unlocking script based on a public key of the first unlocking script, and making the first blockchain transaction available to one or more nodes of a blockchain network.

26. 发明申请

WO2023020764A1 COORDINATING PEER-TO-PEER DATA TRANSFER USING BLOCKCHAIN 审中-公开
公开(公告)号：WO2023020764A1
公开(公告)日：2023-02-23
申请号：PCT/EP2022/070119
申请日：2022-07-19
申请人： NCHAIN LICENSING AG
发明人： PAUNOIU, Alexandru , WRIGHT, Craig, Steven
IPC分类号： G06F21/64 , G06F21/60 , H04L9/32
摘要： A computer implemented method of using a blockchain to coordinate data transfer over a P2P network. A second hash value is obtained, the second hash value generated by hashing a data request associated with a data item with first and second hash functions. The second hash value and the requesting node's public key are sent to the P2P nodes connected to the requesting node, wherein a chain is formed between the requesting and target nodes. The target node splits the data into packets, uses the requesting node's public key to encrypt each of the packets together with the first hash value to generate first encrypted messages, and generates final encrypted messages by encrypting the first encrypted messages with the public keys of nodes in the chain. The encrypted messages are obtained and decrypted to construct the data item, and submitting attestation transactions to the blockchain.

27. 发明申请

WO2023001460A1 ENFORCING CONDITIONS ON BLOCKCHAIN TRANSACTIONS 审中-公开
公开(公告)号：WO2023001460A1
公开(公告)日：2023-01-26
申请号：PCT/EP2022/066645
申请日：2022-06-20
申请人： NCHAIN LICENSING AG
发明人： ZHANG, Wei
IPC分类号： H04L9/00
摘要： 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.

28. 发明申请

WO2023285050A1 BLOCKCHAIN BLOCKS & PROOF-OF-EXISTENCE 审中-公开
公开(公告)号：WO2023285050A1
公开(公告)日：2023-01-19
申请号：PCT/EP2022/066080
申请日：2022-06-14
申请人： NCHAIN LICENSING AG
发明人： DAVIES, Jack Owen , PETTIT, Michaella , HOVE, Sigourney , WRIGHT, Craig Steven
IPC分类号： H04L9/32 , H04L9/00 , G06Q20/40
摘要： A computer-implemented method of constructing a candidate block of a blockchain, wherein the method comprises: obtaining a set of blockchain transactions; obtaining a transaction representation by inputting each of the set of blockchain transactions to a Bloom filter that utilizes one or more hash functions; and constructing the candidate block, wherein the candidate block comprises the transaction representation.

29. 发明申请

WO2022268995A2 METHOD AND SYSTEM FOR SYNCHRONISING USER EVENT STREAMS WITH DUST-BASED RENDEZVOUS TRANSACTIONS 审中-公开
公开(公告)号：WO2022268995A2
公开(公告)日：2022-12-29
申请号：PCT/EP2022/067260
申请日：2022-06-23
申请人： NCHAIN LICENSING AG
发明人： RAND, Ricky Charles
IPC分类号： H04L9/00 , G06Q20/0655 , G06Q20/108 , G06Q20/389 , H04L2209/56 , H04L9/3247 , H04L9/50
摘要： A method is provided by which payments for assets are recorded using blockchain transactions, and verified based on immutable logs associated with the transactions.

30. 发明申请

WO2022238067A1 MULTI-PARTY BLOCKCHAIN ADDRESS SCHEME 审中-公开
公开(公告)号：WO2022238067A1
公开(公告)日：2022-11-17
申请号：PCT/EP2022/059603
申请日：2022-04-11
申请人： NCHAIN LICENSING AG
发明人： PAUNOIU, Alexandru , WRIGHT, Craig, Steven
IPC分类号： G06F21/64 , H04L9/00 , H04L9/32 , H04L9/3239 , H04L9/50
摘要： A method of generating a blockchain transaction, wherein each second party is associated with a public key, each public key is associated with a index, and wherein the method comprises: generating a first transaction comprising a locking script comprising a plurality of sub-scripts, each sub-script being associated with a respective index and comprising an expected hash value of the public key associated with the index associated with that sub-script, and wherein the locking script is configured to require a first unlocking script to comprise a target index, a target public key, and a target signature, and execute the sub-script associated with the target index, wherein each sub-script is configured to generate a hash of the target public key and require the generated hash value to match the respective expected hash value included in that sub-script, and verify that the target signature is a valid signature for the target public key.

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