Abstract:
PURPOSE: A data encoding apparatus, a decoding apparatus, and a method thereof are provided to perform integrity verification of data and to increase stability of a white box password. CONSTITUTION: An encoding unit(200) encodes content by using a white box password table. A logic operating unit(202) performs logic operation with license information of the content and the white box password table. The logic operating unit outputs the encoded white box password table through an exclusive OR operation of the license information. The content is multimedia or book content.
Abstract:
PURPOSE: A group signature system and method for providing controllable connectivity are provided to systematically control anonymity by providing not only unforgeability, traceability, non-frameability, and controllable anonymity but also additional controllable linkability. CONSTITUTION: User equipment provides a subscription request message and user information to an issuer server(S300). The issuer server verifies the validity of the subscription request message. The issuer server transmits a partial parameter necessary for generating a secret key from the user equipment which is generated by using a master issuing key(S302). The user equipment verifies the validity of the received partial parameter. The user equipment stores the secret key for the user equipment(S304). The issuer server verifies the validity of a received signature. The issuer server approves the effective registration of the user equipment. The issuer server stores partial secret key information(S306).
Abstract:
PURPOSE: An anonymous authentication method using a group authentication profile based on x.509 is provided to obtain anonymous authentication by combining a group signature and an authentication method without privacy invasion. CONSTITUTION: An anonymous authentication certificate issuing unit(210) and an anonymous ID confirmation unit(230) are initialized. A service unit(200) confirms the identity of a user. The service unit issues a group public key certificate and a secret key. The service unit performs an identification process by issuing an anonymous authentication certificate. The service unit is issued with the anonymous authentication and the secret key through a subscription. The service unit performs a group signature by using the secret key and the public key on the anonymous authentication certificate. A service providing unit(220) verifies a group authentication certificate.
Abstract:
PURPOSE: A portable storage device, a method for decoding digital rights management(DRM) contents using the same, and an apparatus and a method for providing the contents using a white-box encryption table are provided to encrypt or decode right objects(RO) without a separate RO encryption key. CONSTITUTION: A contents providing part(110) transmits DRM to an external terminal(170) by receiving a request for the DRM from the external terminal. A table generating part(120) generates a locked white-box encryption table by using the user specific information of the terminal. An RO providing part(130) hides an encryption RO for decoding the DRM in the locked white-box encryption table. The RO providing part provides the encryption RO to the terminal.
Abstract:
PURPOSE: An apparatus and a method for installing software using white-box cryptography are provided to use a mixed key by combining an install authentication key and a white-box encryption key. CONSTITUTION: When a software authentication key is input to a user terminal, a mixed key is generated by combining the software authentication key and a white-box encryption key(S10, S20). The generated mixed key decodes the encrypted part of software(S30). The decoding operation is completed, and a white-box encryption table value is changed(S40). After the decoding operation is completed, the software is normally installed at the user terminal(S50).
Abstract:
PURPOSE: An apparatus and method for detecting an eye for a gaze tracking are provided to generate an average eye filter to an input face image after the average eye filter is generated by considering various eye images. CONSTITUTION: An image normalizing unit(110) normalizes an input image by using an average eye filter. An eye filtering unit filters the normalized input image by using the average eye filter. An image binarizing unit(130) binarizes the eye filtering image. An image correcting unit corrects an image error among the generated binary image. An eye detecting unit(150) detects an eye area corresponding to a correction image from an input image.
Abstract:
PURPOSE: An erroneous input sub channel analysis test device of a security processor is provided to supply a power and clock module, thereby easily testing erroneous input of the security processor. CONSTITUTION: A control unit(210) receives an erroneous input test setting value from an analysis system(110). The control unit generates a power control signal and a clock control signal. The control unit inputs an error about a security processor(240). A power control module(220) supplies normal power or erroneously input power to the security processor. A clock control module(230) supplies a normal clock and an erroneously input clock to the security processor.
Abstract:
PURPOSE: A digital content management system and method thereof are provided to offer stable performance in a multimedia searching process by executing a sub-space learning method regardless of numbers of registration data. CONSTITUTION: A learning module(100) extracts feature vectors of inputted digital content. The learning module calculates a column sub-space matrix by mapping sub-pace in the feature vectors. After an index module(200) makes indexes in the digital content by using the sub-space matrix, stores the digital content and the sub-space matrix. A searching module(300) searches the digital content including the indexes.