Artwork transaction method and artwork transaction apparatus and computer program therefor

1. A transaction method of uploading artwork, to be executed by a computer, the transaction method of uploading the artwork comprising:

receiving, by the computer, the artwork to be uploaded and biometric signature data, wherein the biometric signature data includes digital ink data of a signature of an artist who created the artwork, the digital ink data including a series of coordinate data forming a drawn line of the signature;

generating by the computer a contract account on a blockchain network;

subsequent to receiving the artwork and the biometric signature data and subsequent to generating the contract account, issuing by the computer an exhibition transaction to the contract account on the blockchain network, wherein the exhibition transaction includes information identifying the artwork and includes the biometric signature data; and

at a later point in time, confirming whether an uploader of the artwork is the artist by using the biometric signature data included in the exhibition transaction.

2. The transaction method of uploading artwork according to claim 1 , further comprising:

determining by the computer whether or not the artwork overlaps with other artwork, wherein,

the exhibition transaction is issued when the computer determines that the artwork does not overlap with other artwork.

3. The transaction method of uploading artwork according to claim 1 , further comprising:

applying by the computer a first data encryption key to encrypt the artwork; and

storing by the computer the encrypted artwork in a distributed file system.

4. The transaction method of uploading artwork according to claim 3 , further comprising:

generating by the computer a pair of a first public key and a first secret key; and

applying by the computer the first public key to encrypt the first data encryption key.

5. The transaction method of uploading artwork according to claim 3 , further comprising:

receiving by the computer an acquisition request indicating an acquisition of the artwork;

acquiring by the computer the encrypted artwork from the distributed file system and applying by the computer the first data encryption key to decode the encrypted artwork;

embedding by the computer a watermark into the decoded artwork; and

storing by the computer the artwork including the embedded watermark in the distributed file system.

6. The transaction method of uploading artwork according to claim 4 , further comprising:

receiving by the computer an acquisition request indicating an acquisition of the artwork;

applying by the computer the first secret key to decode the first data encryption key;

acquiring by the computer the encrypted artwork from the distributed file system and applying by the computer the decoded first data encryption key to decode the encrypted artwork;

embedding by the computer a watermark into the decoded artwork; and

storing by the computer the artwork including the embedded watermark in the distributed file system.

7. The transaction method of uploading artwork according to claim 5 , further comprising:

applying by the computer a second data encryption key to encrypt the artwork including the embedded watermark, wherein,

the encrypted artwork that includes the embedded watermark is stored in the distributed file system.

8. The transaction method of uploading artwork according to claim 7 , further comprising:

generating by the computer a pair of a second public key and a second secret key; and

applying by the computer the second public key to encrypt the second data encryption key.

9. The transaction method of uploading artwork according to claim 5 , further comprising:

determining by the computer whether or not the acquisition request is approvable; and

issuing by the computer an acquisition transaction to the contract account on the blockchain network when the acquisition request is determined to be approvable, wherein the acquisition transaction includes information regarding an acquirer who has issued the acquisition request and includes identification information of the exhibition transaction.

10. The transaction method of sharing uploading artwork according to claim 9 , further comprising:

generating by the computer the watermark based on identification information of the acquisition transaction.

11. The transaction method of uploading artwork according to claim 5 , further comprising:

generating by the computer the watermark based on data acquired when the artwork is created.

12. An artwork transaction apparatus for uploading artwork, comprising:

a reception circuit configured to receive the artwork to be uploaded and biometric signature data, wherein the biometric signature data includes digital ink data of a signature of an artist who created the artwork, the digital ink data including a series of coordinate data forming a drawn line of the signature; and

a first transaction issue circuit configured to:

generate a contract account on a blockchain network,

subsequent to the reception circuit receiving the artwork and the biometric signature data and subsequent to the first transaction issue circuit generating the contract account, issue an exhibition transaction to the contract account on the blockchain network, wherein the exhibition transaction includes information identifying the artwork and includes the biometric signature data, and

at a later point in time, confirm whether an uploader of the artwork is the artist by using the biometric signature data included in the exhibition transaction.

13. The artwork transaction apparatus according to claim 12 , further comprising:

an overlap determination circuit configured to determine whether or not the artwork overlaps with other artwork, wherein

the first transaction issue circuit issues the exhibition transaction responsive to the overlap determination circuit determining that the artwork does not overlap with other artwork.

14. The artwork transaction apparatus according to claim 12 , further comprising:

a first artwork encryption processing circuit configured to apply a first data encryption key to encrypt the artwork; and

a first artwork storage processing circuit configured to store the encrypted artwork in a distributed file system.

15. The artwork transaction apparatus according to claim 14 , further comprising:

a first key pair generation circuit configured to generate a pair of a first public key and a first secret key; and

a first key encryption processing circuit configured to apply the first public key to encrypt the first data encryption key.

16. The artwork transaction apparatus according to claim 14 , further comprising:

a second reception circuit configured to receive an acquisition request indicating an acquisition of the artwork;

an artwork decoding processing circuit configured to receive the encrypted artwork from the distributed file system and apply the first data encryption key to decode the encrypted artwork;

a watermark embedding processing circuit configured to embed a watermark into the decoded artwork; and

a second artwork storage processing circuit configured to store the artwork including the embedded watermark in the distributed file system.

17. The artwork transaction apparatus according to claim 15 , further comprising:

a second reception circuit configured to receive an acquisition request indicating an acquisition of the artwork;

a key decoding processing circuit configured to apply the first secret key to decode the first data encryption key;

an artwork decoding processing circuit configured to acquire the encrypted artwork from the distributed file system and apply the decoded first data encryption key to decode the encrypted artwork;

a watermark embedding processing circuit configured to embed a watermark into the decoded artwork; and

a second artwork storage processing circuit configured to store the artwork including the embedded watermark in the distributed file system.

18. The artwork transaction apparatus according to claim 16 , further comprising:

a second artwork encryption processing circuit configured to apply a second data encryption key to encrypt the artwork including the embedded watermark, wherein

the second artwork storage processing circuit stores, in the distributed file system, the encrypted artwork that includes the embedded watermark.

19. The artwork transaction apparatus according to claim 18 , further comprising:

a second key pair generation circuit configured to generate a pair of a second public key and a second secret key; and

a second key encryption processing circuit configured to apply the second public key to encrypt the second data encryption key.

20. The artwork transaction apparatus according to claim 16 , further comprising:

an acquisition availability determination circuit configured to determine whether or not the acquisition request is approvable; and

a second transaction issue circuit configured to issue an acquisition transaction to the contract account on the blockchain network responsive to the acquisition availability determination circuit determining that the acquisition request is approvable, wherein the acquisition transaction includes information regarding an acquirer who has issued the acquisition request and includes identification information of the exhibition transaction.

21. The artwork transaction apparatus according to claim 20 , further comprising:

a watermark generation circuit configured to generate the watermark based on identification information of the acquisition transaction.

22. The artwork transaction apparatus according to claim 16 , further comprising:

a watermark generation circuit configured to generate the watermark based on data acquired when the artwork is created.

23. A non-transitory computer-readable medium comprising a computer-executable program and configured to cause a computer to function as an artwork transaction apparatus for uploading artwork, the medium causing the computer to perform:

receiving the artwork to be uploaded and biometric signature data, wherein the biometric signature data includes digital ink data of a signature of an artist who created the artwork, the digital ink data including a series of coordinate data forming a drawn line of the signature;

generating a contract account on a blockchain network;

subsequent to receiving the artwork and the biometric signature data and subsequent to generating the contract account, issuing an exhibition transaction to the contract account on the blockchain network, wherein the exhibition transaction includes information identifying the artwork and includes the biometric signature data; and

at a later point in time, confirming whether an uploader of the artwork is the artist by using the biometric signature data included in the exhibition transaction.

24. The medium according to claim 23 , further causing the computer to perform:

determining whether or not the artwork overlaps with other artwork, wherein,

the exhibition transaction is issued when the computer determines that the artwork does not overlap with other artwork.

25. The medium according to claim 23 , further causing the computer to perform:

applying a first data encryption key to encrypt the artwork; and

storing the encrypted artwork in a distributed file system.

26. The medium according to claim 25 , further causing the computer to perform:

generating a pair of a first public key and a first secret key; and

applying the first public key to encrypt the first data encryption key.

27. The medium according to claim 25 , further causing the computer to perform:

receiving an acquisition request indicating an acquisition of the artwork;

reading the encrypted artwork from the distributed file system and applying the first data encryption key to decode the encrypted artwork;

embedding a watermark into the decoded artwork; and

storing the artwork including the embedded watermark in the distributed file system.

28. The medium according to claim 26 , further causing the computer to perform:

receiving an acquisition request indicating an acquisition of the artwork;

applying the first secret key to decode the first data encryption key;

reading the encrypted artwork from the distributed file system and applying the decoded first data encryption key to decode the encrypted artwork;

embedding a watermark into the decoded artwork; and

storing the artwork including the embedded watermark in the distributed file system.

29. The medium according to claim 27 , further causing the computer to perform:

applying a second data encryption key to encrypt the artwork including the embedded watermark, wherein,

the encrypted artwork including the embedded watermark is stored in the distributed file system.

30. The medium according to claim 29 , further causing the computer to perform:

generating a pair of a second public key and a second secret key; and

applying the second public key to encrypt the second data encryption key.

31. The medium according to claim 27 , further causing the computer to perform:

determining whether or not the acquisition request is approvable; and

issuing an acquisition transaction to the contract account on the blockchain network when the acquisition request is determined to be approvable, wherein the acquisition transaction includes information regarding an acquirer who has issued the acquisition request and includes identification information of the exhibition transaction.

32. The medium according to claim 31 , further causing the computer to perform:

generating the watermark based on identification information of the acquisition transaction.

33. The medium according to claim 27 , further causing the computer to perform:

generating the watermark based on data acquired when the artwork is created.