SYSTEM AND METHOD FOR MAINTAINING A SEGREGATED DATABASE IN A MULTIPLE DISTRIBUTED LEDGER SYSTEM

• US 20180068130A1
• Filed: 09/02/2016
• Published: 03/08/2018
• Est. Priority Date: 09/02/2016
• Status: Active Grant

• Current Assignee: Toronto-Dominion Bank
• Original Assignee: Toronto-Dominion Bank
• Inventors: CHAN, Paul Mon-Wah, HALDENBY, Perry Aaron Jones, LEE, John Jong Suk
• Granted Patent: US 10,282,558 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 21/602 Providing cryptographic facilities or services
• CPC Class Codes: G06F 21/606 by securing the transmission between two devices or processes
• CPC Class Codes: G06F 21/6227 where protection concerns the structure of data, e.g. records, types, queries
• CPC Class Codes: G06F 21/6245 Protecting personal data, e.g. for financial or medical purposes
• CPC Class Codes: G06F 21/64 Protecting data integrity, e.g. using checksums, certificates or signatures
• CPC Class Codes: G06Q 40/00 Finance; Insurance; Tax strategies; Processing of corporate or income taxes
• CPC Class Codes: H04L 9/3239 involving non-keyed hash functions, e.g. modification detection codes [MDCs], MD5, SHA or RIPEMD
• CPC Class Codes: H04L 9/50 using hash chains, e.g. blockchains or hash trees

Abstract

An apparatus maintains a segregated database in a multiple distributed ledger system. The apparatus includes a storage device that stores software instructions for controlling a processor that when executed by the processor configure the processor to: create distributed ledgers, each created distributed ledger being associated with a respective individual profile; maintain a segregated database apart from the distributed ledgers including, for each individual profile, profile balance data; and process a data exchange between exchanging profiles. To process the data exchange, the processor is configured to receive data exchange data regarding parameters of the data exchange; approve the data exchange based on a check of the data exchange data against profile balance data in the database; access the distributed ledgers associated with the exchanging profiles; and cause a distributed ledger data exchange corresponding to the data exchange to be added to the accessed distributed ledgers when the data exchange is approved.

Claims

1. An apparatus for maintaining a segregated database in a multiple distributed ledger system, comprising:

a storage device; and

a processor coupled to the storage device, the storage device storing software instructions for controlling the processor that when executed by the processor configure the processor to;

create distributed ledgers, each created distributed ledger being associated with a respective individual profile;

maintain a segregated database apart from the distributed ledgers including, for each individual profile, profile balance data; and

process a data exchange between exchanging profiles, including;

receive data exchange data regarding parameters of the data exchange;

approve the data exchange based on a check of the data exchange data against profile balance data in the database;

access the distributed ledgers associated with the exchanging profiles; and

cause a distributed ledger data exchange corresponding to the data exchange to be added to the accessed distributed ledgers when the data exchange is approved.

2. The apparatus of claim 1, wherein the individual profile includes an account, the profile balance data includes account balance data, the data exchange includes a transaction between accounts, and the distributed ledgers includes private blockchain ledgers.

3. The apparatus of claim 1, wherein the database includes rules data associated with the individual profiles.

4. The apparatus of claim 3, wherein the processor is further configured to check the data exchange data against the rules data before approving the data exchange.

5. The apparatus of claim 1, wherein the ledger associated with a first one of the exchanging profiles is not accessible to a profile holder associated with a second one of the exchanging profiles, and the ledger associated with the second one of the exchanging profiles is not accessible to a profile holder associated with the first one the exchanging profiles.

6. The apparatus of claim 1, wherein the processor is further configured to update the profile balances in the database associated with the exchanging profiles when the transaction is approved.

7. The apparatus of claim 1, wherein the processor is further configured to maintain a data exchange database apart from the ledgers where data exchanges associated with created profiles are logged.

8. The apparatus of claim 7, wherein the data exchanges logged in the data exchange database are logged in a common ledger.

9. The apparatus of claim 8, wherein the common ledger is a blockchain ledger.

10. The apparatus of claim 1, wherein the processor is configured to decline a data exchange based on the check of the data exchange data against profile balance data in the database.

11. The apparatus of claim 1, wherein the each ledger is a private blockchain ledger, and the processor is configured to generate a genesis block for each created private blockchain ledger.

12. An apparatus for maintaining a segregated database in a multiple distributed ledger system, comprising:

a storage device; and

a processor coupled to the storage device, the storage device storing software instructions for controlling the processor that when executed by the processor configure the processor to;

create distributed ledgers, each created ledger being associated with a respective individual profile;

maintain a token repository database apart from the distributed ledgers including, for each individual profile, profile balance data; and

process a data exchange between exchanging profiles, including;

receive data exchange data regarding parameters of the data exchange and a token associated with a first one of the exchanging profiles;

approve the data exchange based on a check of the data exchange data and the received token against the token repository database; and

when the transaction is approved;

create a new token for the first one of the exchanging profiles and a token for a second one of the exchanging profiles;

access the ledgers associated with the exchanging profiles; and

cause a ledger entry corresponding to the data exchange to be added to the accessed ledgers, the ledger entry added to the accessed ledger for the first one of the exchanging profiles including the created new token for the first one of the exchanging profiles and the blockchain transaction added to the accessed ledger of the second one of the exchanging profiles including the created token for the second one of the exchanging profiles.

13. The apparatus of claim 12, wherein the individual profile includes an account, the profile balance data includes account balance data, the data exchange includes a transaction between accounts, the distributed ledgers includes private blockchain ledgers, and the ledger entry includes a blockchain transaction.

14. The apparatus of claim 13, wherein the processor is configured to generate a genesis block for each created private blockchain ledger.

15. The apparatus of claim 12, wherein the ledger associated with the first one of the exchanging profiles is not accessible to a profile holder associated with the second one of the exchanging profiles, and the ledger associated with the second one of the exchanging profiles is not accessible to a profile holder associated with the first one the exchanging profiles.

16. The apparatus of claim 12, wherein the processor is further configured to update the token repository database with the created tokens.

17. The apparatus of claim 12, wherein the processor is configured to decline a data exchange based on the check of the data exchange data and the received token against the token repository database.

24. The method of claim 17, further comprising the step of maintaining with the processor a data exchange database apart from the distributed ledgers where data exchanges associated with created profiles are logged.

18. A computer implemented method comprising the steps of:

creating with a processor distributed ledgers, each created distributed ledger being associated with a respective individual profile;

maintaining with the processor a segregated database apart from the distributed ledgers including, for each individual profile, profile balance data; and

processing with a processor a data exchange between exchanging profiles, wherein the processing step includes the steps of;

receiving data exchange data regarding parameters of the data exchange;

approving the data exchange based on a check of the data exchange data against profile balance data in the database;

accessing the ledgers associated with the exchanging profiles; and

causing a distributed ledger data exchange corresponding to the data exchange to be added to the accessed distributed ledgers when the data exchange is approved.

19. The method of claim 18, wherein the individual profile includes an account, the profile balance data includes account balance data, the data exchange includes a transaction between accounts, and the distributed ledgers includes private blockchain ledgers.

20. The method of claim 19, further comprising generating a genesis block for each created private blockchain ledger.

21. The method of claim 18,

wherein the database includes rules data associated with the individual profiles,

wherein processing the data exchange further comprises checking the data exchange data against the rules data before approving the data exchange.

22. The method of claim 18, further comprising the steps of maintaining the ledger associated with a first one of the exchanging profiles inaccessible to a profile holder associated with a second one of the exchanging profiles, and maintaining the ledger associated with the second one of the exchanging profiles inaccessible to a profile holder associated with the first one the exchanging profiles.

23. The method of claim 18, wherein processing the transaction further comprises updating the profile balances in the database associated with the exchanging profiles when the transaction is approved.