Abstract: Methods performed by a computing device for generating Non-Fungible Token (NFT) for a non-digital asset are provided. One of the methods comprises receiving non-digital asset data including media data generated by photographing non-digital asset and additional information, determining whether the media data is generated by photographing a tangible subject, automatically generating an original certificate of non-digital asset data including a result of whether the tangible subject is photographed and the media data, and issuing an NFT for the original certificate.

Abstract: An apparatus for reading an image executes operations including receiving a plurality of images for a same subject from a photographing device, obtaining a screen division value related to the plurality of images, checking focused sections of the plurality of images based on the obtained screen division value, and determining type of the plurality of images based on a result of checking the focused sections. According to the apparatus, it can be determined whether an image is actually photographed without a separate ToF module.

Abstract: An apparatus for reading an image executes operations including receiving a plurality of images for a same subject from a photographing device, obtaining a screen division value related to the plurality of images, checking focused sections of the plurality of images based on the obtained screen division value, and determining type of the plurality of images based on a result of checking the focused sections. According to the apparatus, it can be determined whether an image is actually photographed without a separate ToF module.

Abstract: A method for photographing an image performed by a computer device according to an embodiment of the present application includes obtaining a screen division value for photographing an image, classifying a photographing screen into a plurality of sections based on the screen division value, photographing a first image by focusing a first section among the plurality of sections, photographing a second image by focusing a second section among the plurality of sections and transmitting the first image and the second image to a server. According to the method, it is capable of reading whether an image is actually photographed without having a separate ToF module, and applicable to an outdoor environment on which interference from other light rays is strong.

Abstract: An original certification method according to an embodiment of the present disclosure includes obtaining target data, obtaining a plurality of partial signatures associated with the target data, generating a signature of the target data based on the plurality of partial signatures, and transmitting the target data and the signature to an external device. The plurality of partial signatures are respectively generated based on different private keys among a plurality of private keys, a first private key among the plurality of private keys is stored in a first device, a second private key among the plurality of private keys is stored in a second device, and the first device and the second device are physically separated from each other.

Abstract: A method for preventing forgery of data according to an embodiment includes determining a noise level based on metadata of original data, generating noise by applying the determined noise level to a preset noise pattern, generating transformed data of the original data by adding the generated noise to the original data, and transmitting the transformed data and the metadata to a server.

Abstract: A method according to an embodiment of the present disclosure includes obtaining proof data including a photographed image and a challenge code for proving original of the image, generating hash data by using the proof data, generating signature data for the hash data, transmitting the proof data, the hash data, and the signature data to a server, and receiving an access path to an original verification result of the proof data from the server.

Abstract: A method for preventing forgery of data according to an embodiment includes determining a noise level based on metadata of original data, generating noise by applying the determined noise level to a preset noise pattern, generating transformed data of the original data by adding the generated noise to the original data, and transmitting the transformed data and the metadata to a server.

Abstract: A method for photographing an image performed by a computer device according to an embodiment of the present application includes obtaining a screen division value for photographing an image, classifying a photographing screen into a plurality of sections based on the screen division value, photographing a first image by focusing a first section among the plurality of sections, photographing a second image by focusing a second section among the plurality of sections and transmitting the first image and the second image to a server. According to the method, it is capable of reading whether an image is actually photographed without having a separate ToF module, and applicable to an outdoor environment on which interference from other light rays is strong.