# US 2019/0172057 A1 · Blockchain-implemented method and system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0172057 A1 - Document ID: US20190172057A1 - Status: Published application - Kind: A1 - Application number: 16/320,963 - Filed: 2017-07-21 - Published: 2019-06-06 - Earliest claimed: 2016-07-29 - Assignees: nChain Holdings Limited - Applicants: nChain Holdings Limited - Inventors: Stephane Vincent - Web page: https://patentgrep.com/patent/US20190172057A1 ## CPC - G06Q 20/382: {insuring higher security of transaction} - G06Q 20/0855: {involving a third party} - G06Q 20/145: {Payments according to the detected use or quantity} - G06Q 20/308: {using the Internet of Things} - G06Q 20/3823: {combining multiple encryption tools for a transaction} - G06Q 50/10: Services - G06Q 50/40: Business processes related to the transportation industry (shipping G06Q10/083) - H04L 9/0637: {Modes of operation, e.g. cipher block chaining [CBC], electronic codebook [ECB] or Galois/counter mode [GCM]} - H04L 9/3247: {involving digital signatures} - G06Q 30/0645: Rental transactions; Leasing transactions - G06Q 2220/00: Business processing using cryptography - G06Q 2220/10: Usage protection of distributed data files - H04L 9/50: {using hash chains, e.g. blockchains or hash trees} - G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The invention provide a blockchain-implemented control method and corresponding system(s). The invention may be arranged to control access to and/or use of an interne-enabled resource such as for example an IoT device. The resource may be a device or system. It may, for example, be a vehicle such as a driverless taxi or car. The vehicle may be provided with computing capabilities to enable it to communicate with other computer-based resources and/or interact with a distributed ledger. This distributed ledger may be a blockchain, such as, for example, the Bitcoin blockchain. In one embodiment, the invention provides a method for controlling the use of an interne-enabled resource comprising the steps of: providing a first blockchain transaction comprising at least one output which is redeemable only by provision of at least: i) a secret value selected by a user; and ii) a signature associated with a resource provider; sending use-related information to the resource; generating a second blockchain transaction requesting at least the secret value; and modifying the second blockchain transaction to include the secret value. ## Claims ### Claim 1 A blockchain-implemented method for controlling the use of an internet-enabled resource comprising the steps of: providing a first blockchain transaction comprising at least one output which is redeemable only by provision of at least: a secret value selected by a user; and a signature associated with a resource provider; sending use-related information to the resource; generating a second blockchain transaction requesting at least the secret value; and modifying the second blockchain transaction to include the secret value. ### Claim 2 (depends on 1) A method according to claim 1, wherein the resource is a vehicle and the use-related information comprises information related to a journey. ### Claim 3 (depends on 2) A method according to either claim 2 wherein the use-related information is sent by the resource provider in the form of a tokenised third blockchain transaction comprising either the information or a location thereof. ### Claim 4 (depends on 3) A method according to claim 3, further comprising a step of generating a fourth blockchain transaction comprising at least one output redeemable to return an amount of cryptocurrency underlying the tokenised third blockchain transaction to the resource provider. ### Claim 5 (depends on 1) A method according to claim 1, wherein the second blockchain transaction is generated by the resource and the modification is performed by the user. ### Claim 6 (depends on 1) A method according to claim 1, wherein the second blockchain transaction comprises a first output relating to payable first asset transferrable to the resource provider and a second output relating to a second asset transferrable to the user. ### Claim 7 (depends on 1) A method according to claim 1, wherein the second blockchain transaction comprises preventing means for preventing at least one output of the second blockchain transaction from being modified by the user. ### Claim 8 (depends on 6) A method according to claim 6, wherein the preventing means takes the form of a securing input to the second blockchain transaction comprising the sighash flag SIGHASH_ALL|SIGHASH_ANYONECANPAY. ### Claim 9 (depends on 8) A method according to claim 8 wherein the securing input comprises an amount of cryptocurrency provided by at least one of the resource provider and an electronic wallet associated with the resource. ### Claim 10 (depends on 1) A method according to claim 1, further comprising a step of generating a fifth blockchain transaction comprising at least one output redeemable to refund an amount of cryptocurrency associated with the first blockchain transaction responsive to non-use of the resource. ### Claim 11 (depends on 1) A method according to claim 1, further comprising the step of unlocking the resource in response to validation of modification of the second blockchain transaction. ### Claim 12 (depends on 1) A method according to claim 1, further comprising the step of a user sending at least one confirmation message confirming accuracy of the use-related information, hashing said message and storing said hashed message in a distributed hash table. ### Claim 13 (depends on 1) A method according to claim 1, further comprising the step of hashing the use-related information and storing said hashed information in a distributed hash table. ### Claim 14 (depends on 1) A method according to claim 1, further comprising the step of determining a number of users present in the resource and allowing or disallowing provision of the resource dependent on said number. ### Claim 15 (depends on 1) A method according to claim 1, wherein the resource is a driverless car. ### Claim 16 (depends on 1) A system arranged to perform the method according to claim 1.