Abstract: A refrigerator includes a cabinet configured to define an exterior boundary of the refrigerator with at least one opening therein. The refrigerator also includes a first storage chamber defined by interior walls of the cabinet and configured to store food stuffs and a first door configured to open and close the first storage chamber by rotating about a rotational axis. The refrigerator further includes a second storage chamber that is smaller than the first storage chamber defined at a side of the first door, and that is configured to enable access to food stuffs while the first door remains closed and a second door, located in a predetermined portion of the first door, and configured to open and close the second storage chamber by rotating about the rotational axis.

Abstract: A mobility technology for strengthening safety for an invasion of privacy caused by leakage of contact information is provided. A privacy protection system may include an acquisition attempt detecting unit to detect an external communication terminal that attempts to acquire contact information included in the profile, and an access controller to provide the detected external communication terminal with a right to use the contact information, and to determine whether the contact information is to be provided.

Abstract: A dynamic multi-dimensional code generation and recognition apparatus in which time information and visual recognition information are combined, and a method thereof are provided. According to the present invention, a dynamic multi-dimensional code or a time-variant code including visual recognition information which is associated with source information and changed over time is provided. Accordingly, users may easily ascertain existence of the multi-dimensional code and intended contents of the source information.

Abstract: Provided is a refrigerator including a height-adjustable receiving apparatus in which a rotation gear is vertically moved along a fixed shaft disposed on a mounting member when the rotation gear disposed on a receiving member is rotated, and the receiving member is adjustable in vertical height. The height-adjustable receiving apparatus includes a receiving member in which foods are received, a mounting member on which the receiving member is vertically movably mounted, a fixed shaft longitudinally disposed on the mounting member, a rotation gear disposed on the receiving member, an operation member disposed on the receiving member, and a transmission member disposed on the receiving member.

Abstract: A content protection apparatus using a white-box encryption table includes: a random number generation unit for generating a random number; a white-box encryption table for encrypting the random number and user information provided from a user to generate an encrypted output value; and an operation unit for performing an operation between the encrypted output value and data inputted from an outside to encrypt or decrypt the data.

Abstract: Disclosed is an authentication method using barcodes. the authentication method includes: converting into a first barcode and outputting, by a first user device, authentication related information provided from a service providing server; receiving, by a second user device, the first barcode; generating, by the second user device, signature information or authentication information on the authentication related information by using a signature key or a certificate; and providing, by the second user device, the signature information or the authentication information to the service providing server.

Abstract: A data encoding apparatus for verifying data integrity by using a white box cipher includes: an encoding unit for encoding content by using a white box cipher table; and an arithmetic logic unit for performing an arithmetic logic operation on the white box cipher table and content information to output an encoded white box cipher table. The arithmetic logic operation is an exclusive OR operation. The content information is license information of the content or hash value of the license information of the content.

Abstract: A system for tracking an illegal distributor and preventing an illegal content distribution includes: a forensic mark generator for receiving content and a content identification code from a content providing apparatus to generate a forensic mark; a forensic mark database for storing the generated forensic mark; a forensic mark insertion unit for inserting the forensic mark into the content; and a content database for storing the content into which the forensic mark has been inserted. The system further includes a content transmitter for transmitting the content into which the forensic mark has been inserted to the content utilization apparatus.

Abstract: Disclosed herein is a method of verifying key validity and a server for performing the method. The method is configured such that a service provision server verifies key validity in an anonymous service for providing local linkability. The service provision server receives a revocation list. A local revocation list is generated using the received revocation list and a secret key. A virtual index of a service user required to verify key validity is calculated. Whether a key of the service user is valid is verified, based on whether the virtual index is included in the local revocation list.

Abstract: The present invention relates to a content protection apparatus and method using binding of additional information to an encryption key. The content protection apparatus includes an encryption unit for creating an encryption key required to encrypt data requested by a user terminal and then generating encrypted data in which the data is encrypted. An additional information management unit manages additional information including authority information about the encrypted data. A White-Box Cryptography (WBC) processing unit generates a WBC table required to bind the encryption key corresponding to the encrypted data to the additional information. A bound data generation unit generates bound data in which the encrypted key is bound to the additional information, using a cipher included in the WBC table.

Abstract: A refrigerator is provided. The refrigerator includes a cabinet defining a storage space, a drawer type door withdrawably disposed on the cabinet, the drawer type door opening and closing the storage space, a lower receiving member connected to the drawer type door, the lower receiving member being withdrawn together with the drawer type door, an upper receiving member withdrawably disposed above the lower receiving member, and a restraint member disposed on the drawer type door, the restraint member being rotated according to a user's selection to selectively restrain the upper receiving member and to allow the upper receiving member to be selectively interlocked with the drawer type door, thereby selectively withdrawing the upper receiving member.

Abstract: A group signature system includes: a key issuer server for generating a first parameter of a group public key, generating a corresponding master issuing key, and issuing a signature key to a user when a user device joins; an opener server for generating a second parameter of the group public key, and a corresponding master opening key and master linking key; and a linker server for checking whether two valid signatures have been linked by using the master linking key when the two signatures corresponding to a group public key are given. The group signature system further includes: a signature verifying unit for confirming a validity of the given signatures and a signer information confirming unit for confirming a validity of singer confirming information generated by the opener server.

Abstract: The embodiment relates to a refrigerator. The refrigerator allows a user to easily draw in and out foods stored in a storage chamber.

Abstract: There is provided an anonymous service method of providing local linkability. The anonymous service method providing local linkability according to exemplary embodiments of the invention, an anonymous authentication operation based on a short group signature is performed, for which the concept of a local linkability is introduced to secure linkability within the same service domain. Namely, in the interior of a service provider, a virtual index having a fixed value is calculated for each service user, and in this case, although a plurality of service providers collude with each other, they cannot calculate a virtual index having the same value, whereby the linkability can be secured within the same service domain but not within the interiors of different service domains.

Abstract: A refrigerator is disclosed. The refrigerator includes a cabinet configured to define an exterior boundary of the refrigerator with at least one opening therein. The refrigerator also includes a first storage chamber defined by interior walls of the cabinet and configured to store food stuffs and a first door configured to open and close the first storage chamber by rotating about a rotational axis. The refrigerator further includes a second storage chamber that is smaller than the first storage chamber defined at a side of the first door, and that is configured to enable access to food stuffs while the first door remains closed and a second door, located in a predetermined portion of the first door, configured to open and close the second storage chamber by rotating the rotational axis, wherein a rotation direction of the second door is identical to the rotation direction of the first door.

Abstract: A refrigerator is disclosed. The refrigerator includes a cabinet configured to define an exterior boundary of the refrigerator. The refrigerator also includes a first storage configured to store food stuffs and a first door configured to open and close the first storage chamber. The refrigerator further includes a second storage chamber defined at a side of the first door, and configured to enable access to food stuffs while the first door remains and a second door located in a predetermined portion of the first door, and configured to open and close the second storage chamber, wherein a rotation direction of the second door is identical to a rotation direction of the first door.