Abstract: A system and method for distributing data are provided. The system for distributing data which manages the distribution of data from one or more data transmitting nodes to a data receiving node, according to one embodiment of the present invention, comprises: an off-chain pool management unit; an integrity authentication unit; a data distribution verification unit; and a block chain storage unit.

Abstract: One aspect of the present invention discloses a text watermarking method for hiding user information. The text watermarking method comprises inputting encryption variable set information with which to encrypt a target document, wherein the target document includes text, generating an encrypted block based on the encryption variable set information and embedding the encrypted block into the target document by using an embedding rule of the encrypted block. The encryption variable set information includes a predetermined random key value, a user ID, and information indicating the embedding rule of the encrypted block. The predetermined random key value and the information indicating an embedding rule of the encrypted block are managed in a non-disclosure manner.

Abstract: One aspect of the present invention discloses a text watermarking method for hiding user information. The text watermarking method comprises inputting encryption variable set information with which to encrypt a target document, wherein the target document includes text, generating an encrypted block based on the encryption variable set information and embedding the encrypted block into the target document by using an embedding rule of the encrypted block. The encryption variable set information includes a predetermined random key value, a user ID, and information indicating the embedding rule of the encrypted block. The predetermined random key value and the information indicating an embedding rule of the encrypted block are managed in a non-disclosure manner.

Abstract: A system and method for distributing data are provided. The system for distributing data which manages the distribution of data from one or more data transmitting nodes to a data receiving node, according to one embodiment of the present invention, comprises: an off-chain pool management unit; an integrity authentication unit; a data distribution verification unit; and a block chain storage unit.

Abstract: Disclosed are a data management system and method of distributing a digital content file by using an on-off hybrid blockchain network technology, in which transaction information data having a large volume is processed on an off-blockchain network and the final results of each transaction are recorded on an on-blockchain network. The system and method have an advantage of increasing the number of transactions that can be processed per second, thereby enabling distribution of a large volume of data. In addition, the system and method can encourage every node across a network to participate in distribution of data as file senders by rewarding each of the nodes for the participation on the basis of the contribution of each node.

Abstract: Apparatus and method for protecting digital rights of model data learned by artificial intelligence for smart broadcasting contents. A learning apparatus for protecting digital rights includes a learning model setup unit accepting input of a learning model, a data loader importing or receiving one or more of learning data, a learning engine forcing the learning model to learn with the learning data imported or received at the data loader, and a storage unit storing the learning model forced to learn by the learning engine, wherein the learning data include information on a subject of rights and data other than the information on a subject of rights, and wherein the learning model learning the information on a subject of rights is configured to have a fixed output value related to the information on a subject of rights.

Abstract: Disclosed is an apparatus for protecting a copyright of a 3D object model and method therefor, the apparatus including: a first module generating an original 3D object model by combining voxels in a 3D space of X, Y, and Z axes; a second module calculating voxel lengths of the axes and based on a voxel length of a longest axis among the lengths, the second module extending lengths of the remaining axes, thereby obtaining a 3D space area; a third module generating an obfuscation unique key; a fourth module generating at least one rotation axis position, rotation voxel range, and rotation frequency based on the key; and a fifth module axially rotating at least one voxel structure included in each rotation voxel range at a rotation angle by each rotation frequency to distort a shape of the model, thereby performing obfuscation. Accordingly, the copyright can be effectively protected.

Abstract: The present invention provides a method for creating an electronic document file comprising monitoring creation and changes of an electronic document file, receiving a policy file including document level set-up information and security policy, searching for words associated with business information from the text data retrieved from the electronic document file, computing an exposure score of the electronic document file based on the number of times for words associated with business information being searched and document level set-up information, assigning a document level to the electronic document file based on the exposure score, and inserting a watermark to text of the electronic document file to be displayed on the client device based on the user's personal information received from the server. Accordingly, leakage of business documents for electronic document files including business information can be prevented by providing pre-security and post-security measures stronger than conventional measures.

Abstract: Disclosed is a digital signature service system and method based on a hash function in which a main agent, who requires the generation of a digital signature, does not personally generate the digital signature, and wherein digital signatures may be simultaneously and stably generated for large-scale data such as multiple electronic documents and digital data using a hash function and a hash tree, which are known as a simple and secure method, to guarantee the integrity of the data in a digital signature-based structure based on a server.

Abstract: Provided are a method and apparatus for automatically splitting an object and a method, apparatus, and system for registering a file. The method for splitting an object includes receiving the data of a stereolithography (STL) file representing a 3D image, tagging vertex coordinates corresponding to objects included in the 3D image so that the vertex coordinates are classified for each object, and splitting each of the objects included in the 3D image based on the tagged vertex coordinates.

Abstract: A method for transmitting contents including tracking information is described. The method comprising the steps of generating a content transmission stream relevant to an original content, determining at least part of the original content as a forensic mark (FM) target segment, generating a FM stream including the FM segment in which a particular pattern is inserted into the FM target segment and a FM stream different from the content transmission stream and transmitting the content transmission stream and the FM stream to a receiving device, wherein the FM stream is combined with the content transmission stream based on session information related to the transmitting in the receiving device.

Abstract: Provided are a method and apparatus for automatically splitting an object and a method, apparatus, and system for registering a file. The method for splitting an object includes receiving the data of a stereolithography (STL) file representing a 3D image, tagging vertex coordinates corresponding to objects included in the 3D image so that the vertex coordinates are classified for each object, and splitting each of the objects included in the 3D image based on the tagged vertex coordinates.

Abstract: Disclosed is a digital signature service system and method based on a hash function in which a main agent, who requires the generation of a digital signature, does not personally generate the digital signature, and wherein digital signatures may be simultaneously and stably generated for large-scale data such as multiple electronic documents and digital data using a hash function and a hash tree, which are known as a simple and secure method, to guarantee the integrity of the data in a digital signature-based structure based on a server.

Abstract: A method for transmitting contents including tracking information is described. The method comprising the steps of generating a content transmission stream relevant to an original content, determining at least part of the original content as a forensic mark (FM) target segment, generating a FM stream including the FM segment in which a particular pattern is inserted into the FM target segment and a FM stream different from the content transmission stream and transmitting the content transmission stream and the FM stream to a receiving device, wherein the FM stream is combined with the content transmission stream based on session information related to the transmitting in the receiving device.

Abstract: A content stream transmission apparatus with reverse traceability comprises a pattern insertion unit dividing the original content in units of segments and inserting at least two patterns to each segment and creating at least two pattern contents; an encryption unit encrypting the at least two pattern contents; a content selection unit selecting one of the at least two pattern contents based on user identification information; and a transmission unit transmitting the selected pattern content to a user device. Therefore, as copyright and leakage tracking information are enabled to be inserted into the contents in real-time, the present invention not only provides security-enhanced contents but also services real-time content streaming services.

Abstract: The present invention provides a method for controlling a mobile device adaptively to the user by collecting and analyzing the behavior pattern of the users of the mobile devices, and generating the suitable policy for each of the users. The method may comprise gathering, by the mobile device, behavior patterns of the user, sending, by the mobile device, information about the gathered behavior patterns to an analysis device, analyzing, by the analysis device, the information about the behavior patterns, generating, by the analysis device, media control information based on the behavior patterns and access authority of the user by referring to a management table comprising a list of one or more mobile devices and one or more information about behavior patterns, sending it, by the analysis device, to the mobile device, and controlling the mobile device based on the media control information.

Abstract: The present invention provides a method for creating an electronic document file comprising monitoring creation and changes of an electronic document file, receiving a policy file including document level set-up information and security policy, searching for words associated with business information from the text data retrieved from the electronic document file, computing an exposure score of the electronic document file based on the number of times for words associated with business information being searched and document level set-up information, assigning a document level to the electronic document file based on the exposure score, and inserting a watermark to text of the electronic document file to be displayed on the client device based on the user's personal information received from the server. Accordingly, leakage of business documents for electronic document files including business information can be prevented by providing pre-security and post-security measures stronger than conventional measures.

Abstract: Disclosed herein are a method and apparatus for preventing the leakage of information. A method for preventing the leakage of information, which is performed by an apparatus for preventing the leakage of information may include determining whether confidential information is included in content displayed on a screen of a device, covering the confidential information by overlaying a security layer on at least some of the content displayed on the screen based on the determination, displaying the confidential information by releasing the security layer covering the confidential information in response to a confidential information exposure request signal, and covering the confidential information by overlaying the security layer in response to the release of the confidential information exposure request signal.

Abstract: A content stream transmission apparatus with reverse traceability comprises a pattern insertion unit dividing the original content in units of segments and inserting at least two patterns to each segment and creating at least two pattern contents; an encryption unit encrypting the at least two pattern contents; a content selection unit selecting one of the at least two pattern contents based on user identification information; and a transmission unit transmitting the selected pattern content to a user device. Therefore, as copyright and leakage tracking information are enabled to be inserted into the contents in real-time, the present invention not only provides security-enhanced contents but also services real-time content streaming services.

Abstract: A virtual application creating system comprises: a virtual environment library block including a plurality of modules that process native application program interfaces (APIs) of an operating system such that the native application APIs are suited to a virtual environment, finding a module capable of processing a specific native API from the plurality of modules when the specific native API is called and operating the found module; a virtual application installation block receiving position information of an application to be virtualized and information on an installation place where the application will be virtualized and installed from a user and inserting the virtual environment library block into a memory to install a virtual application in the installation place; and a virtual application execution block executing the virtual application installed in the installation place.