Abstract: Disclosed are a method and a device for compressing and decompressing unit files when encrypting an electronic publication (EPUB) file. The method for compressing unit files for EPUB file encryption comprises: a step of determining an encryption target unit file from among a plurality of unit files forming an EPUB file; a step of performing encryption of the compressed encryption target unit file; and a step of performing compression of general unit files among the plurality of unit files in addition to the encryption target unit file. As such, by performing compression of the encryption target unit file before the general unit files, it is possible to effectively reduce the size of a single packaged EPUB file.

Abstract: Disclosed are a method and an apparatus for de-identification of personal information. The method for de-identification of personal information comprises the steps of: obtaining, from a database, a raw table including records in which raw data indicating the personal information is recorded; generating generalized data by generalizing the raw data recorded in each of the records included in the raw table; setting a generalized hierarchical model consisting of the raw data and the generalized data; generating a raw lattice including a plurality of candidate nodes on the basis of the generalized hierarchical model; and setting, from among the plurality of candidate nodes included in the raw lattice, a final lattice including at least one candidate node satisfying a predetermined criterion. Thus, it is possible for the personal information to be efficiently de-identified.

Abstract: A technology related to a method and apparatus for providing a relation note using correlation is disclosed. The method for providing the relation note, which is performed by a relation note providing server interworking with a user terminal, comprises the steps of: receiving one or more generated notes from the user terminal; updating, according to a configurable reference, correlation between notes indicating a relation between the one or more notes; and providing the one or more notes to the user terminal on the basis of the correlation between the notes. Therefore, the method may provide a user interface which is intelligent and smart to enable a plurality of notes to be more effectively identified and managed on the basis of the correlation.

Abstract: Disclosed are a method and device for calculating a correlation between notes using a database constructed on a basis of artificial intelligence, and supporting a service for the notes on a basis of the calculated correlation. A method by which a note providing device that interworks with a user terminal provides notes, includes: constructing a keyword DB by extracting a keyword from a note generated through the user terminal and reflecting a weight calculated through machine learning using the extracted keyword; and calculating a correlation score for each of a plurality of target notes correlated with a reference note using the keyword DB. Therefore, the method and device for providing the notes using the artificial intelligence-based correlation calculation can more accurately recommend the correlated notes by reflecting the interaction of the user.

Abstract: The present invention relates to a method and an apparatus for generating an index for an encrypted field in order to protect private information in database. The method for generating the index for the encrypted field according to an embodiment of the present invention constructs an index as encrypted data itself without decrypting and storing contents of the encrypted field, constructs an index using distance information between encrypted data and a pre-configured reference value when the index is constructed, calculates a distance value from the reference value even when a search is performed, and performs a search by comparing the distance value with constructed index information table. In particular, when duplicated data exists, the present invention configures the duplicated data as a set of lower leaf nodes for a leaf node, thereby minimizing a search time.

Abstract: Disclosed is an apparatus for controlling access to a security content using near field network communication of mobile devices. A policy issuance provider registration unit requests a content security policy for a first content, a security content, to a service server, receives the content security policy for the first content, requests to the service server for a first mobile device to be registered as a content security policy issuance provider, and receives a result of registration and a provider policy from the service server. A policy issuance provider converting unit converts the first mobile device to the content security policy issuance provider when receiving a request for access for browsing the first content through near-field network communication from another mobile device in which a DRM client application is being executed.

Abstract: A device and a method for encoding a data column are disclosed. A schema inquiry unit inquires into a schema of an original table which is a data table for performing encoding in a database in which a plurality of data tables are stored. A backup performing unit generates schema information of a backup table on the basis of the schema of the original table, generates a backup table by using the schema information of the backup table so as to copy data of the original table into the backup table, changes the original table by adding a backup column to the original table, and inactivates constraint conditions included in the changed original table so as to copy original columns included in the changed original table into the backup column. An encoding unit encodes data of an encoding target column, a column in which encoding is to be performed in the changed original table, and enters the data in each field of the original columns of the changed original table.

Abstract: Disclosed are a file-processing device for executing a pre-processed file, and a recording medium for executing a related file-processing method in a computer. Once a request for registry information corresponding to the extension of a file is inputted according to a request for the execution of the file selected by the user, a registry-converting unit outputs a preset substitute value instead of the registry default value for executing a connection program corresponding to the extension of the file as the result value for the registry information request. A control unit pre-processes the file through a control program set in correspondence to the substitute value. A file-executing unit executes the file by executing the connection program of the file corresponding to the registry default value after pre-processing.

Abstract: Disclosed is an apparatus for controlling access to a security content using near field network communication of mobile devices. A policy issuance provider registration unit requests a content security policy for a first content, a security content, to a service server, receives the content security policy for the first content, requests to the service server for a first mobile device to be registered as a content security policy issuance provider, and receives a result of registration and a provider policy from the service server. A policy issuance provider converting unit converts the first mobile device to the content security policy issuance provider when receiving a request for access for browsing the first content through near-field network communication from another mobile device in which a DRM client application is being executed.

Abstract: A system and method of protecting digital media contents, which maintain compatibility with an existing system and block any attempt to illegally use the digital media contents having various formats, and which reduce a system load and maximize a possibility of reusing the digital media contents. The system includes a packager for analyzing a format of contents and encoding at least a portion of a data region located in a payload of the contents, and for generating encoded contents by inserting encoding information including at least one of an encoding key value and contents information into the contents; and a digital rights management (DRM) server for receiving a request for a license and the encoding information from an external device which receives the encoded contents, for confirming the encoding information and then generating a license which is used to decode the encoded contents, and for providing the generated license to the external device.

Abstract: Disclosed are a file-processing device for executing a pre-processed file, and a recording medium for executing a related file-processing method in a computer. Once a request for registry information corresponding to the extension of a file is inputted according to a request for the execution of the file selected by the user, a registry-converting unit outputs a preset substitute value instead of the registry default value for executing a connection program corresponding to the extension of the file as the result value for the registry information request. A control unit pre-processes the file through a control program set in correspondence to the substitute value. A file-executing unit executes the file by executing the connection program of the file corresponding to the registry default value after pre-processing.

Abstract: A user authentication method of authenticating a user on an on-line basis using a user's e-mail address and hardware information is provided. The user authentication method includes the steps of: transmitting a user's authentication client platform hardware information and e-mail address to an authentication server module through an authentication client module installed in the authentication client platform; and the authentication client module determining user authentication according to whether or not the e-mail address and hardware information received from the authentication server module is identical to user's e-mail address and hardware information stored in an authentication database. A user's authentication request and authentication is confirmed through an e-mail in the case that authentication fails in the primary authentication process. The user authentication method performs authentication by using a user's hardware information and e-mail address, their uniqueness of which is verified.