Privacy preserving architecture for permissioned blockchains
In some embodiments, a processor may generate a request associated with a transaction, collect an anchor associated with the request, and transition the transaction into a collection of two or more hashes; the processor may submit the transaction to an ordering service. In some embodiments, a processor may receive a request associated with a transaction, identify that a first preimage associated with a first hash is known to a first shard, and generate a first identification tag associated with the transaction. In some embodiments, a processor may receive a request associated with a transaction, assign a first shard a first task, and identify that a first preimage associated with a first hash is known to the first shard; the processor may perform the task.
1. A method for processing a private transaction in a blockchain network, the method comprising:
generating a request associated with a transaction;
validating the transaction privately, wherein validating the transaction privately prevents other shards from viewing information by storing preimages of hashes in specific shards within a blockchain;
collecting an anchor associated with the request;
transitioning the transaction into a collection of two or more hashes; and
submitting the transaction to an ordering service.
2. The method of claim 1 , wherein the request is a processable action that modifies a blockchain ledger.
3. The method of claim 1 , wherein the transaction is locally validated by two or more shards in the blockchain network.
4. The method of claim 3 , wherein the two or more shards validate the transaction comprising:
receiving by each of the two or more shards a respective, known preimage associated with the two or more hashes; and
matching, by each of the two or more shards, the respective, known preimage to the two or more hashes.
5. The method of claim 4 , further comprising:
performing, by the two or more shards, an atomic commit of the request.
6. The method of claim 5 , wherein the atomic commit is performed without any respective, known preimage being shared with any of the other two or more shards.
7. A system for processing a private transaction in a blockchain network, the system comprising:
a memory; and
a processor in communication with the memory, the processor being configured to perform operations comprising:
generating a request associated with a transaction;
validating the transaction privately, wherein validating the transaction privately prevents other shards from viewing information by storing preimages of hashes in specific shards within a blockchain;
collecting an anchor associated with the request;
transitioning the transaction into a collection of two or more hashes; and
submitting the transaction to an ordering service.
8. The system of claim 7 , wherein the request is a processable action that modifies a blockchain ledger.
9. The system of claim 7 , wherein the transaction is locally validated by two or more shards in the blockchain network.
10. The system of claim 9 , wherein the two or more shards validate the transaction comprising:
receiving by each of the two or more shards a respective, known preimage associated with the two or more hashes; and
matching, by each of the two or more shards, the respective, known preimage to the two or more hashes.
11. The system of claim 10 , wherein the operations further comprise:
performing, by the two or more shards, an atomic commit on the request.
12. The system of claim 11 , wherein the atomic commit is performed without any respective, known preimage being shared with any of the other two or more shards.
13. A computer program product for processing a private transaction in a blockchain network, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the processors to perform a function, the function comprising:
generating a request associated with a transaction;
validating the transaction privately, wherein validating the transaction privately prevents other shards from viewing information by storing preimages of hashes in specific shards within a blockchain;
collecting an anchor associated with the request;
transitioning the transaction into a collection of two or more hashes; and
submitting the transaction to an ordering service.
14. The computer program product of claim 13 , wherein the request is a processable action that modifies a blockchain ledger.
15. The computer program product of claim 13 , wherein the transaction is locally validated by two or more shards in the blockchain network.
16. The computer program product of claim 15 , wherein the two or more shards validate the transaction comprising:
receiving by each of the two or more shards a respective, known preimage associated with the two or more hashes; and
matching, by each of the two or more shards, the respective, known preimage to the two or more hashes.
17. The computer program product of claim 16 , further comprising:
performing, by the two or more shards, an atomic commit on the request.
18. The computer program product of claim 17 , wherein the atomic commit is performed without any respective, known preimage being shared with any of the other two or more shards.
19. A method for processing a private transaction in a blockchain network, the method comprising:
receiving a request associated with a transaction;
identifying that a first preimage associated with a first hash is known to a first shard;
validating the transaction privately using the first shard, wherein validating the transaction privately prevents other shards from viewing information by storing preimages of hashes in specific shards within a blockchain; and
generating a first identification tag associated with the transaction.
20. The method of claim 19 , further comprising:
identifying that a second preimage associated with a second hash is known to a second shard; and
generating a second identification tag associated with the transaction.
21. The method of claim 20 , wherein the first identification tag is displayed to a first user and a second user, and wherein the second identification tag is displayed to the first user and a third user.
22. The method of claim 21 , further comprising:
committing, atomically, the transaction to the blockchain network.
23. A method for processing a private transaction in a blockchain network, the method comprising:
receiving a request associated with a transaction;
assigning a first shard a first task;
identifying that a first preimage associated with a first hash is known to the first shard;
validating the transaction privately using the first shard, wherein validating the transaction privately prevents other shards from viewing information by storing preimages of hashes in specific shards within a blockchain; and
performing the first task.
24. The method of claim 23 , further comprising:
assigning a second shard a second task;
identifying that a second preimage associated with a second hash is known to the second shard; and
performing the second task.
25. The method of claim 24 , wherein the first task and the second task are performed as a part of an atomic commit of the transaction.