Blockchain-implemented method and system for access control on remote internet-enabled resources

1. A computer-implemented method for controlling access to or use of a vehicle capable of generating, storing, and communicating its own public and private keys and signatures provided by a resource provider for signing blockchain transactions, the computer-implemented method performed by the vehicle, the resource provider and a user, and the computer-implemented method comprising steps of:

providing, to a blockchain, a first blockchain transaction representing a deposit for access to or use of the vehicle, the first blockchain transaction comprising at least one output redeemable by provision of at least:

a redeem script;

a secret value selected by the user requesting access to or use of the vehicle; and

signatures associated with any two of:

the resource provider,

the user, or

the vehicle;

receiving use-related information of the user;

generating a second blockchain transaction comprising an input having a first signature script signed with the signature associated with the vehicle;

requesting at least the secret value;

validating a modification of the first signature script of the input of the second blockchain transaction to include the secret value and the user's signature;

unlocking the vehicle for access or use by the user in response to:

validating the modification of the first signature script in the second blockchain transaction on the blockchain; and

confirming the use-related information; and

in response to unlocking the vehicle, redeeming the at least one output of the second blockchain transaction by providing, in a second signature script of a payment blockchain transaction on the blockchain, the user's signature, the redeem script, and the secret value.

2. The computer-implemented method according to claim 1 , wherein the use-related information comprises information related to a journey.

3. The computer-implemented method according to 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.

4. The computer-implemented method according to claim 3 , further comprising 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.

5. The computer-implemented method according to claim 1 , wherein the modification is performed by the user.

6. The computer-implemented method according to claim 1 , wherein the second blockchain transaction comprises a first output relating to a payable first asset transferrable to the resource provider and a second output relating to a second asset transferrable to the user.

7. The computer-implemented method according to claim 1 , wherein the second blockchain transaction comprises a securing input for preventing at least one output of the second blockchain transaction from being modified by the user.

8. The computer-implemented method according to claim 7 , wherein the securing input to the second blockchain transaction comprises the sighash flag SIGHASH_ALL|SIGHASH_ANYONECANPAY.

9. The computer-implemented 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 vehicle.

10. The computer-implemented method according to claim 4 , further comprising 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 vehicle.

11. The computer-implemented method according to claim 1 , further comprising receiving at least one confirmation message confirming accuracy of the use-related information, hashing the confirmation message and storing the hashed confirmation message in a distributed hash table.

12. The computer-implemented method according to claim 1 , further comprising hashing the use-related information and storing the hashed use-related information in a distributed hash table.

13. The computer-implemented method according to claim 1 , further comprising determining a number of users present in the vehicle and allowing or disallowing provision of the vehicle dependent on the number.

14. The computer-implemented method according to claim 1 , wherein the vehicle is a driverless car.

15. A system for controlling access to or use of a vehicle capable of generating, storing, and communicating its own public and private keys and signatures provided by a resource provider for signing blockchain transactions, the system comprising:

a blockchain;

one or more processors; and

memory storing computer-executable instructions, that, as a result of execution by the one or more processors, cause the system to:

provide, to the blockchain, a first blockchain transaction representing a deposit for access to or use of the vehicle, the first blockchain transaction comprising at least one output redeemable by provision of at least:

a redeem script;

a secret value selected by a user requesting access to or use of the vehicle; and

signatures associated with any two of: the resource provider, the user, or the vehicle;

receive use-related information of the user;

generate a second blockchain transaction comprising an input having a first signature script signed with the signature associated with the vehicle;

request at least the secret value;

validate a modification of the first signature script of the input of the second blockchain transaction to include the secret value and the user's signature;

unlock the vehicle for access or use by the user in response to:

validating the modification of the first signature script in the second blockchain transaction on the blockchain; and

confirming the use-related information; and

in response to unlocking the vehicle, redeem the at least one output of the second blockchain transaction by providing, in a second signature script of a payment blockchain transaction on the blockchain, the user's signature, the redeem script, and the secret value.

16. The system according to claim 15 , wherein the use-related information comprises information related to a journey.

17. The system according to claim 15 , wherein the modification is performed by the user.

18. The system according to claim 15 , wherein the second blockchain transaction comprises a first output relating to a payable first asset transferrable to the resource provider and a second output relating to a second asset transferrable to the user.

19. The system according to claim 15 , wherein the second blockchain transaction comprises a securing input for preventing at least one output of the second blockchain transaction from being modified by the user.

20. The system according to claim 15 , wherein the computer-executable instructions comprise instructions, that, as a result of execution by the one or more processors, further cause the system to hash the use-related information and store the hashed use-related information in a distributed hash table.