Abstract: A method, apparatus and computer programs for preventing illegal distribution of digital content data, are discussed. In an embodiment, the apparatus includes a controller configured to control the apparatus to: store at least first and second program code segments; receive the digital content data from a first device, the digital content data including a copyright code segment for managing copyright infringement; check the copyright code segment by using the first program code segment for selectively reproducing the digital data contents at a second device; and control an output operation of the digital content data by using the second program code segment based on the copyright code segment, wherein the digital content data is downloaded from a digital data server to the first device through a communication network, wherein decrypting and reproduction operations of the digital content data are executed by a software program provided by the digital data server.

Abstract: The invention is directed to a source device and a method for encrypting digital contents at the source device. According to an embodiment, the method includes receiving digital content from an external device, the digital content being encrypted using a first encryption algorithm in the external device; decrypting the received digital content; performing an addition operation by using a first source internal key and an identifier (ID), the ID being associated with at least one of a target device and a storage medium of the target device; generating a source encryption key based on an output of the addition operation and a second source internal key by using a second encryption algorithm; re-encrypting the decrypted digital content using the source encryption key; and transmitting the re-encrypted digital content without the source encryption key to the target device.

Abstract: The invention is directed to a source device and a method for encrypting digital contents at the source device. According to an embodiment, the method includes performing a first addition operation by using a first source internal key and an identifier (ID), the first source internal key being associated with the source device, the ID being associated with at least one of a target device and a storage medium of the target device, and the target device being connected to the source device; generating a source encryption key based on an output of the first addition operation and a second source internal key by using a predetermined encryption algorithm, wherein the second source internal key is associated with the source device; encrypting the digital content using the source encryption key; and transmitting the encrypted digital content without the source encryption key to the target device.

Abstract: A device and method for decrypting digital contents are discussed. According to an embodiment, a method for decrypting digital content at a target device, includes receiving the digital content without a source encryption key from a source device connected to the target device, the digital content having been encrypted with the source encryption key in the source device, wherein the source device is configured to perform an authenticating operation with the target device by using an identifier (ID) associated with at least one of the target device and a storage medium of the target device; performing a first addition operation by using a first target internal key and the ID; generating a target encryption key based on an output of the first addition operation and a second target internal key by using a predetermined encryption algorithm; and decrypting the encrypted digital content using the target encryption key.

Abstract: The invention is directed to a source device and a method for encrypting digital content at the source device. According to an embodiment, the method includes authenticating a target device connected to the source device using an identifier (ID) associated with at least one of the target device and a storage medium of the target device; performing an addition operation by using a source internal key and the ID, the source internal key being associated with the source device; generating a source encryption key based on an output of the addition operation; encrypting the digital content using the source encryption key; and transmitting the encrypted digital content without the source encryption key to the target device.

Abstract: A device and method for decrypting digital contents are discussed. According to an embodiment, a method for decrypting digital content at a target device, includes receiving the digital content without a source encryption key from a source device connected to the target device, the digital content having been encrypted with the source encryption key in the source device; performing an addition operation by using a first target internal key and an identifier (ID), the first target internal key being associated with the target device, and the ID being associated with at least one of the target device and a storage medium of the target device; generating a target encryption key based on an output of the addition operation and a second target internal key by using a predetermined encryption algorithm, the second target internal key being associated with the target device; and decrypting the encrypted digital content using the target encryption key.

Abstract: A device and method for decrypting digital contents are discussed. According to an embodiment, a method for decrypting digital content at a target device, includes receiving the digital content without a source encryption key from a source device connected to the target device, the digital content having been encrypted with the source encryption key in the source device, wherein the source device is configured to perform an authenticating operation with the target device by using an identifier (ID) associated with at least one of the target device and a storage medium of the target device; performing an addition operation by using a target internal key and the ID, the target internal key being associated with the target device; generating a target encryption key based on an output of the addition operation; and decrypting the encrypted digital content by using the target encryption key.

Abstract: An apparatus to measure noise in an image signal and a method thereof. The apparatus includes an area division unit to divide an image signal having noise therein into a plurality of areas and to output area information corresponding to the plurality of areas, a variance calculation unit to calculate variances of the plurality of areas using the area information, the image signal and a noise-attenuated image signal obtained by attenuating the noise from the image signal, and a noise determination unit to determine an amount of noise in the image signal by comparing the calculated variances of the plurality of areas. Accordingly, the noise measurement apparatus can measure the amount of noise irrespective of characteristics of the image signal, and thus noise attenuation can be performed more accurately.

Abstract: A device and method for decrypting digital contents are discussed. According to an embodiment, a method for decrypting digital content at a target device, includes receiving the digital content without a source encryption key from a source device connected to the target device, the digital content having been encrypted with the source encryption key in the source device, wherein the source device is configured to perform an authenticating operation with the target device by using an identifier (ID) associated with at least one of the target device and a storage medium of the target device; performing a first addition operation by using a first target internal key and the ID; generating a target encryption key based on an output of the first addition operation and a second target internal key by using a predetermined encryption algorithm; and decrypting the encrypted digital content using the target encryption key.

Abstract: A device and method for decrypting digital contents are discussed. According to an embodiment, a method for decrypting digital content at a target device, includes receiving the digital content without a source encryption key from a source device connected to the target device, the digital content having been encrypted with the source encryption key in the source device; performing an addition operation by using a first target internal key and an identifier (ID), the first target internal key being associated with the target device, and the ID being associated with at least one of the target device and a storage medium of the target device; generating a target encryption key based on an output of the addition operation and a second target internal key by using a predetermined encryption algorithm, the second target internal key being associated with the target device; and decrypting the encrypted digital content using the target encryption key.

Abstract: A device and method for decrypting re-encrypted digital contents are discussed. According to an embodiment, the method includes receiving the re-encrypted digital content without a source encryption key from a source device connected to the target device, wherein the re-encrypted digital content is generated at the source device by: 1) decrypting an encrypted digital content which is previously encrypted in an external device, and 2) re-encrypting the decrypted digital content with the source encryption key; performing an addition operation by using a first target internal key and an identifier (ID); generating a target encryption key based on an output of the addition operation and a second target internal key by using a predetermined encryption algorithm, the second target internal key being associated with the target device; and decrypting the re-encrypted digital content using the target encryption key.

Abstract: A device and method for decrypting digital contents are discussed. According to an embodiment, a method for decrypting digital content at a target device, includes receiving the digital content without a source encryption key from a source device connected to the target device, the digital content having been encrypted with the source encryption key in the source device, wherein the source device is configured to perform an authenticating operation with the target device by using an identifier (ID) associated with at least one of the target device and a storage medium of the target device; performing an addition operation by using a target internal key and the ID, the target internal key being associated with the target device; generating a target encryption key based on an output of the addition operation; and decrypting the encrypted digital content by using the target encryption key.

Abstract: The invention is directed to a source device and a method for encrypting digital content at the source device. According to an embodiment, the method includes authenticating a target device connected to the source device using an identifier (ID) associated with at least one of the target device and a storage medium of the target device; performing an addition operation by using a source internal key and the ID, the source internal key being associated with the source device; generating a source encryption key based on an output of the addition operation; encrypting the digital content using the source encryption key; and transmitting the encrypted digital content without the source encryption key to the target device.

Abstract: The invention is directed to a source device and a method for encrypting digital contents at the source device. According to an embodiment, the method includes performing an addition operation by using a first source internal key and an identifier (ID), the first source internal key being associated with the source device, the ID being associated with at least one of a target device and a storage medium of the target device, and the target device being connected to the source device; generating a source encryption key based on an output of the addition operation and a second source internal key by using a predetermined encryption algorithm, the second source internal key being associated with the source device; encrypting the digital content using the source encryption key; and transmitting the encrypted digital content without the source encryption key to the target device.

Abstract: The invention is directed to a source device and a method for encrypting digital contents at the source device. According to an embodiment, the method includes receiving digital content from an external device, the digital content being encrypted using a first encryption algorithm in the external device; decrypting the received digital content; performing an addition operation by using a first source internal key and an identifier (ID), the ID being associated with at least one of a target device and a storage medium of the target device; generating a source encryption key based on an output of the addition operation and a second source internal key by using a second encryption algorithm; re-encrypting the decrypted digital content using the source encryption key; and transmitting the re-encrypted digital content without the source encryption key to the target device.

Abstract: The invention is directed to a source device and a method for encrypting digital contents at the source device. According to an embodiment, the method includes performing a first addition operation by using a first source internal key and an identifier (ID), the first source internal key being associated with the source device, the ID being associated with at least one of a target device and a storage medium of the target device, and the target device being connected to the source device; generating a source encryption key based on an output of the first addition operation and a second source internal key by using a predetermined encryption algorithm, wherein the second source internal key is associated with the source device; encrypting the digital content using the source encryption key; and transmitting the encrypted digital content without the source encryption key to the target device.

Abstract: A broadcast-receiving apparatus and a synchronization method thereof are disclosed, the broadcast-receiving apparatus including a control unit which controls to record a broadcast program on an external apparatus according to broadcast information received from the external apparatus via a short range wireless communication method. Accordingly, recording of a broadcast program being played back on the external apparatus can be continued on the broadcast receiving apparatus.

Abstract: The present invention relates to a device for generating a signal and method for controlling operation of the same. The present invention provides a device for generating a signal, which includes an electrode (110), if connected to an external power source (200), supplied with a voltage from the external power source (200), a signal generating unit (130) having a plurality of terminals, the signal generating unit (130) deciding whether to operate the device according to a size of a voltage applied to a first terminal among a plurality of the terminals, the signal generating unit (130) outputting a prescribed signal according to the decision, and a control circuit (120), if the electrode (110) is connected to a plurality of the terminals, controlling a voltage applied to a plurality of the terminals. Accordingly, the present invention is able to control whether to operate a signal generating device (100) using an external power source (200).

Abstract: The present invention relates to a method for processing an image in a capsule endoscope and capsule endoscope system that processes an internal human body image acquired by a capsule type endoscope swallowable into a human body. The present invention includes a step (a) of acquiring a light emitting image consecutively in a light emitting mode, a step (b) of acquiring a no-light image in a no-light mode after elapse of a prescribed time, and a step (c) of correcting the light emitting image acquired in the step (a) using the no-light image acquired in the step (b). According to the present invention, noises attributed to dark-current and heat occurring in an image of taking an internal human body can be corrected and a quality of an internal human body image can be enhanced using an effective part of a no-light image only in removing dark-current noise and thermal noise.

Abstract: A surface scraping method for a light guide plate includes the steps of providing a light guide plate, providing a scraper having an oscillating element which the scraper generates an oscillating variation by the oscillating element, and performing the scraper to scrape a surface of the light guide plate. Such that, a plurality of stripes are formed on the surface and a shape of each of the stripes is corresponding to the oscillating variation.