Systems and methods for communication, storage and processing of data provided by an entity over a blockchain network
A computer-implemented method of making a decision on a blockchain is provided. The method comprises providing a blockchain voting commitment transaction ( 2 ) redeemable by means of a first signature (σ(A m ), σ(B m )) associated with a selection (A, B) and a second signature (σ(A), σ(B)) associated with the selection, providing each of a plurality of participants (U i ) with at least one share (k A,i , k B,i ) of at least one respective secret value (k A , k B ) wherein a threshold number of shares is required in order to execute said second signature, and submitting the blockchain voting commitment transaction ( 2 ) to the blockchain.
1. A computer-implemented method of making a decision on a blockchain, the method comprising:
providing a first blockchain transaction having an output redeemable by means of a first signature associated with a selection of a candidate from a plurality of candidates by a plurality of participants and a second signature associated with the selection, wherein the first signature is a signature using a private key of said selected candidate;
providing each of said plurality of participants with at least one share of each of a plurality of secret values, wherein a threshold number of shares of one of said secret values is required in order to produce said second signature, wherein each of said plurality of secret values is associated with a respective one of said plurality of candidates; and
submitting the first blockchain transaction to the blockchain.
2. The method of claim 1 , wherein at least one participant adds to the first blockchain transaction at least one signed input representative of a cryptographic asset.
3. The method of claim 2 , further comprising the step of providing a second blockchain transaction redeemable, upon satisfaction of a locktime condition, to return at least a portion of the cryptographic asset to the at least one participant.
4. The method of claim 1 , wherein the first blockchain transaction comprises an m-of-n multisignature redeem script, and wherein at least one share of a corresponding secret value of the plurality of secret values is added to the redeem script.
5. The method of claim 4 , wherein the at least one share is encrypted with a first public key of at least one candidate of said plurality of candidates.
6. The method of claim 5 , further comprising the step of combining the at least one share with identification data identifying the at least one candidate prior to encryption with the first public key.
7. The method of claim 6 , wherein the combination comprises concatenation of the at least one share and the identification data.
8. The method of claim 1 , wherein the step of providing the shares to the participants comprises at least one of: (i) a dealer entity providing the shares to the participants; and (ii) the participants generating the shares among themselves.
9. The method of claim 1 , comprising the step of obscuring which participant provides which share prior to submission of the first blockchain transaction to the blockchain.
10. The method of claim 1 , further comprising the step of providing a third blockchain transaction arranged to redeem the first blockchain transaction.
11. The method of claim 1 , further comprising the step of validating at least one share of a corresponding secret value of the plurality of secret values using at least one second public key.
12. The method of claim 11 , wherein the plurality of participants collaborate in combining at least one subset of shares to determine said at least one second public key.
13. A computer-implemented system comprising:
a processor; and
memory including executable instructions that, as a result of execution by the processor, causes the system to perform any embodiment of the computer-implemented method as claimed in claim 1 .
14. A non-transitory computer-readable storage medium having stored thereon executable instructions that, as a result of being executed by a processor of a computer system, cause the computer system to at least perform an embodiment of the method as claimed in claim 1 .
15. The method of claim 1 , wherein:
a first secret value of said plurality of secret values is reconstructed from a plurality of shares provided by a set of said participants; and
the first secret value is used to generate the second signature.
16. The method of claim 1 , wherein the threshold number of shares of one of said secret values is usable to produce said second signature.
17. The method of claim 1 , wherein the threshold number of shares of one of said secret values is used to generate said second signature.