| Patent application number | Description | Published |
|---|
| 20090022323 | SECRET KEY PREDISTRIBUTION METHOD - A secret key predistribution method is provided. The secret key predistribution method includes the steps of: performing a tree structure establishment process by causing a center to release a tree structure and causing sensor nodes to store the released tree structure; performing a seed key and hashed key generation process by causing the center to select a seed key and extract hashed keys by applying a hash function according to the tree structure; and performing a key predistribution process by causing the center to select key id sequences and causing the sensor nodes to store the selected sequences and corresponding hashed keys. Accordingly, the secret key distribution method can provide excellent resiliency and efficiency in terms of hash computational complexity. | 01-22-2009 |
| 20100071074 | APPARATUS FOR EXECUTING INTEROPERABLE DIGITAL RIGHTS MANAGEMENT USING CONTENTS DEVICE AND METHOD OF PERFORMING OPERATIONS BETWEEN CONTENTS DEVICE AND DIGITAL RIGHTS MANAGEMENT TOOL FOR INTEROPERABLE DIGITAL RIGHTS MANAGEMENT - Provided are an apparatus for executing interoperable digital rights management (DRM) using a contents device and a method of performing an operation between the contents device and a DRM tool for interoperable DRM, and more particularly, a method and apparatus for executing a DRM tool in various environments, regardless of the type of device or type of DRM tool, using an interfaced DRM executing apparatus including a DRM processor or a DRM tool agent. | 03-18-2010 |
| 20100142921 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DIGITAL BROADCASTING - This research discloses a digital broadcasting contents transmitting/receiving apparatus that can quickly and easily purchase broadcasting contents, and a method thereof. The apparatus for receiving a digital broadcasting includes: a broadcasting contents receiver configured to receive a broadcasting content and first program protection information (PPI) including distribution scope information of the broadcasting content; a content storage configured to store the received broadcasting content; a purchase requester configured to transmit purchase request information according to a purchase request of a user for the stored broadcasting content; and a PPI controller configured to replace the first PPI with second PPI transmitted to the broadcasting contents receiver in response to the purchase request and including information on a changed distribution scope of the broadcasting content for which the purchase request is made. | 06-10-2010 |
| 20100146538 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING BROADCASTING PROGRAM ID - Provided is a method and apparatus for transmitting/receiving broadcasting program ID for identifying a broadcasting program along with a broadcasting program. The method for transmitting a broadcasting program, includes: acquiring audio/video bitstream for at least one broadcasting program; acquiring a broadcasting program identification (ID) corresponding to the broadcasting program; generating a media file including the audio/video bitstream and metadata; and transmitting the media file, wherein the metadata includes the broadcasting program ID and reference information for the audio/video bitstream. | 06-10-2010 |
| 20100158255 | METHOD AND SYSTEM FOR PROTECTING BROADCASTING PROGRAM - Disclosed is a method and system for storing encryption key information and package key information for decrypting encrypted broadcasting programs to store broadcasting programs. The method for protecting broadcasting programs includes generating and storing information about a first encryption key for encrypting broadcasting programs, and generating package key information by encrypting the first encryption key using a second encryption key. | 06-24-2010 |
| 20100161974 | MASTER TERMINAL CAPABLE OF REGISTERING AND MANAGING TERMINALS OF PERSONAL USE SCOPE, AND METHOD AND SYSTEM USING THE SAME - Disclosed are a master terminal capable of registering and managing terminals that belong to a personal use scope, which will be referred to as personally used terminals or personal use terminals, hereafter, and a method and system for managing personal use terminals by using the master terminal. The method for managing a personal use group using a first master terminal to register and manage terminals belonging to a personal use scope includes: requesting a second master terminal that belongs to the personal use scope for personal use group information; receiving the personal use group information from the second master terminal; and registering a terminal that belongs to the personal use scope as the personal use group based on the received personal use group information. | 06-24-2010 |
| 20100161983 | DIGITAL CONTENTS REPRODUCING TERMINAL AND DIGITAL CONTENTS TRANSMISSION/RECEPTION METHOD THEREOF - A terminal for reproducing a digital content in support of transmitting/receiving the digital content to/from another terminal includes: an encryption unit configured to encrypt the digital content to produce encrypted digital content; a use scope determining unit configured to determine a use scope of a target terminal to which the digital content is to be transmitted; a personal-use authentication information generation unit configured to transform encryption information of the digital content according to a determination result of the use scope determining unit and generate personal-use authentication information; and a communication unit configured to transmit the encrypted digital content and the personal-use authentication information to the target terminal. | 06-24-2010 |
| 20100161991 | APPARATUS AND METHOD FOR CONTROLLING USE OF BROADCASTING PROGRAM USING SIGNATURE IN PROGRAM INFORMATION - Disclosed is a broadcasting signal receiving apparatus for controlling use of a broadcasting program using a signature in program information and a method thereof. The broadcasting signal receiving apparatus includes a communicating unit for receiving a broadcasting signal, an extracting unit for extracting a broadcasting program and program information from the received broadcasting signal, and a determining unit configured to generate a temporal signature for confirmation (confirmation signature) which determines whether the program information is changed or not from the original program information and determine validity of the program information by comparing a signature included in the extracted program information with the confirmation signature. | 06-24-2010 |
| 20100161997 | APPARATUS AND METHOD FOR AUTHENTICATING PERSONAL USE OF CONTENTS BY USING PORTABLE STORAGE - A system for authenticating personal use of contents by using a portable storage medium includes: a portable personal use authentication device configured to store domain authentication information; and a contents personal use authentication apparatus configured to extract playback information for playing a provided content based on the domain authentication information and provide the extracted playback information to a player | 06-24-2010 |
| 20100302268 | DISPLAY APPARATUS AND METHOD OF DRIVING THE SAME - A display apparatus includes a display panel which receives a light, a backlight which provides the light to the display panel in response to a driving voltage, and a backlight driver which applies the driving voltage to the backlight. The backlight is turned on and off during a communication period to transmit data to an external receiver using visible light communication during the communication period. The backlight driver controls a voltage level of the driving voltage according to a number of turn-on periods of the driving voltage during the communication period. | 12-02-2010 |
| 20110044695 | Visible Light Communication System - A visible light communication system includes a light source emitting a first light having information, an optical filter receiving the first light and an externally provided second light and filtering the first and second light according to wavelength bands of the first and second light to output a filtered light, a photoelectric device receiving the filtered light to generate an output signal, and a data output part receiving the output signal to output data. Accordingly, the external light not having information may be substantially prevented from being provided to the photoelectric device, thereby preventing noise from occurring on the output signal. In addition, no additional operation is required to filter the output signal from the photoelectric device. | 02-24-2011 |
| 20110103771 | APPARATUS AND METHOD FOR RECORDING PARTIAL ENCRYPTION OF BROADCAST PROGRAM - An apparatus for encrypting and recording a broadcasting program includes a packet input unit configured to receive packets of a broadcasting program to be recorded and sequentially output the packets, an encryption selector configured to receive the packets sequentially output from the packet input unit, selectively output the received packets to a first path and to a second path, wherein packets to be encrypted are output to the first path and packets not to be encrypted are output to the second path, an encryption processor configured to encrypt the packets output to the first path based on a predetermined encryption method, and a storing unit configured to store the encrypted packets from the encryption processor or store the packets output to the second path. | 05-05-2011 |
| 20110153783 | APPARATUS AND METHOD FOR EXTRACTING KEYWORD BASED ON RSS - An apparatus and method for detecting a keyword are provided. The method for detecting a keyword includes collecting RSS information, extracting terms from the RSS information, calculating importance levels of the terms, and selecting a keyword from among the terms based on the importance levels. | 06-23-2011 |
