Application US20200044863

TECHNIQUES FOR SECURING DIGITAL SIGNATURES USING MULTI-PARTY COMPUTATION
[+] Show Details

US20200044863

1. A method for securing digital signatures using multi-party computation, comprising: (9) (2)

generating at least one first secret share of a plurality of secret shares by a first system, wherein the plurality of secret shares includes the at least one first secret share and at least one second secret share, wherein each of the at least one second secret share is generated by one of at least one second system, wherein the at least one second system is not the first system;

signing data based on the at least one first secret share when a signing policy is met, wherein the signing occurs as part of an interactive signing process, wherein the interactive signing process includes running a multi-party computation protocol by the first system and the at least one second system, wherein each system uses each secret share generated by the system during the interactive signing process, wherein the signed data corresponds to a public key, wherein the public key is generated based on the plurality of secret shares, wherein the signing policy at least requires a minimum number of secret shares of the plurality of secret shares, wherein neither the at least one first secret share alone nor the at least one second secret share alone is sufficient to meet the signing policy, wherein no portion of the at least one first secret share is revealed to the at least one second system during the interactive signing process, wherein no portion of the at least one second secret share is revealed to the first system during the interactive signing process.

2. The method of claim 1, further comprising: (0) (2)

3. The method of claim 1, wherein the public key is a first public key, further comprising: (0) (1)

4. The method of claim 1, wherein the signing policy further requires at least one additional requirement. (2) (0)

7. The method of claim 1, further comprising: (0) (1)

8. The method of claim 1, further comprising: (2) (1)

11. The method of claim 1, wherein the interactive signing process includes a plurality of rounds, wherein the plurality of rounds consists of at least one first round and a second round, wherein the at least one of the plurality of shares is stored offline during the at least one first round of the interactive signing process. (0)

12. The method of claim 1, wherein at least one of the first system and the at least one second system is offline during at least one round of the interactive signing process. (0)

13. The method of claim 1, wherein at least one of the plurality of shares is offline during at least one round of the interactive signing process. (0)

14. The method of claim 1, wherein no portion of the at least one first secret share is revealed outside of the first system, wherein no portion of the at least one second secret share is revealed outside of the at least one second system. (0)

15. A non-transitory computer readable medium having stored thereon instructions for causing a processing circuitry to execute a process, the process comprising: (0) (2)

16. A system for securing digital signatures using multi-party computation, comprising: (9) (4)

a processing circuitry; and

a memory, the memory containing instructions that, when executed by the processing circuitry, configure the system to:

generate at least one first secret share of a plurality of secret shares, wherein the system is a first system, wherein the plurality of secret shares includes the at least one first secret share and at least one second secret share, wherein each of the at least one second secret share is generated by one of at least one second system, wherein the at least one second system is not the first system;

17. The system of claim 16, wherein the system is further configured to: (0) (2)

18. The system of claim 16, wherein the public key is a first public key, wherein the system is further configured to: (0) (1)

19. The system of claim 16, wherein the signing policy further requires at least one additional requirement. (2) (0)

22. The system of claim 16, wherein the system is further configured to: (0) (1)

23. The system of claim 16, wherein the system is further configured to: (2) (1)

26. The system of claim 16, wherein the interactive signing process includes a plurality of rounds, wherein the plurality of rounds consists of at least one first round and a second round, wherein the at least one of the plurality of shares is stored offline during the at least one first round of the interactive signing process. (0)

27. The system of claim 16, wherein at least one of the first system and the at least one second system is offline during at least one round of the interactive signing process. (0)

28. The system of claim 16, wherein at least one of the plurality of shares is offline during at least one round of the interactive signing process. (0)

29. The system of claim 16, wherein no portion of the at least one first secret share is revealed outside of the first system, wherein no portion of the at least one second secret share is revealed outside of the at least one second system. (0)

View Abstract and Specification Size

PDF with Images and Document Face >

Full Text Publication >

Application US20200044863

TECHNIQUES FOR SECURING DIGITAL SIGNATURES USING MULTI-PARTY COMPUTATION

Patent Matrix® Search