Abstract: A record including an original document and a modification to the original document is created. Metadata associated with the modification to the original document is generated. The modification in stored in a data store. Creation and registration of a decentralized identifier (DID) document for the modification is requested based on the generated metadata. Modified document metadata is generated which includes a document hash and the created DID document for the modification. Recordation of the modification in a blockchain transaction, creation and registration of a DID document for the modified document, and generation of verifiable credentials for the modification are requested. The generated verifiable credentials for the modification are stored and a quick response (QR) code for the DID document for the modification is generated. A visual representation of the modification and the QR code for the modification are added to the original document, generating a sealed document.

Abstract: Provided is a method and apparatus for digital image watermarking. In the method and apparatus, a computer system receives a first image and receive information for embedding in the first image. The computer system preprocesses the first image to produce a preprocessed first image and preprocesses the information by at least channel-encoding the information to produce preprocessed information including a plurality of sets of bits. The computer system embeds the preprocessed information in the preprocessed first image by at least selecting a plurality of blocks of the preprocessed first image and embedding in each block of the plurality of blocks a respective set of bits of the plurality of sets of bits. Each set of bits of the plurality of sets of bits is embedded in a minimum number of blocks of the plurality of blocks, where the minimum number of blocks is greater than one.

Abstract: A method, computer, and non-transitory computer-readable medium including a computer-executable program are provided for trading artwork. The method for trading artwork, to be executed by the computer, includes receiving an acquisition request, from an external device, to acquire uploaded artwork. The method includes, in response to the acquisition request, issuing a transaction to a contract account on a blockchain network, the transaction including first information regarding the acquisition request and second information regarding the uploaded artwork.

Abstract: An artwork managing method performed by a computer is provided. The computer receives a request for usage of first artwork, and generates a first decentralized identify (DID) document as a DID document including a first DID, which is a DID for identifying the first artwork, and including a second DID, which is a DID for identifying a first user requesting the usage of the first artwork. Also provided is a non-transitory program for causing the computer to perform the artwork management method. The method, computer, and program allow for robust management of information related to artwork using self-sovereign identify (SSI).

Abstract: An artwork transaction method, an artwork transaction apparatus, and a program therefor are provided, which allow for secure transaction of artwork on a network using computers. The artwork transaction method includes using a computer to receive the artwork and biometric signature data. The artwork transaction method includes using the computer to issue, to a contract account on a blockchain network, an exhibition transaction that includes information used for identifying the artwork and includes the biometric signature data.

Abstract: A record including an original document and a modification to the original document is created. Metadata associated with the modification to the original document is generated. The modification in stored in a data store. Creation and registration of a decentralized identifier (DID) document for the modification is requested based on the generated metadata. Modified document metadata is generated which includes a document hash and the created DID document for the modification. Recordation of the modification in a blockchain transaction, creation and registration of a DID document for the modified document, and generation of verifiable credentials for the modification are requested. The generated verifiable credentials for the modification are stored and a quick response (QR) code for the DID document for the modification is generated. A visual representation of the modification and the QR code for the modification are added to the original document, generating a sealed document.

Abstract: A signature verification platform includes: a locale classifying engine configured to decide a style of a signature by applying machine learning-based classification techniques to the signature that is input to the locale classifying engine; a parameter profile generating section configured to select a verification profile which suits the style decided by the locale classifying engine; and a verification engine configured to verify the signature using the verification profile selected by the parameter profile generating section.

Abstract: A system and a method are provided to facilitate a search of information indicated by stroke data. A system includes a processor. The processor obtains stroke data generated in response to handwriting input and generates, by performing semantic analysis on the stroke data, semantic metadata including semantic data indicating semantics of the stroke data and purpose data determined based on the semantic data.

Abstract: An artwork transaction method, an artwork transaction apparatus, and a program therefor are provided, which allow for secure transaction of artwork on a network using computers. The artwork transaction method includes using a computer to receive the artwork and biometric signature data. The artwork transaction method includes using the computer to issue, to a contract account on a blockchain network, an exhibition transaction that includes information used for identifying the artwork and includes the biometric signature data.

Abstract: A signature verification platform includes: a locale classifying engine configured to decide a style of a signature by applying machine learning-based classification techniques to the signature that is input to the locale classifying engine; a parameter profile generating section configured to select a verification profile which suits the style decided by the locale classifying engine; and a verification engine configured to verify the signature using the verification profile selected by the parameter profile generating section.