摘要:
Provided is a method of protecting a content consumer's privacy. The method includes classifying contents into content groups, encrypting the contents using different encryption keys, generating a plurality of decryption keys each of which can decrypt all contents in each of the content groups, and provides the generated decryption keys to authorized clients, wherein each client is provided with a different decryption key.
摘要:
Provided are methods of generating and verifying an electronic signature of software data, wherein software data is split into a plurality of blocks, electronic signatures corresponding to each of the blocks are generated, and some of the electronic signatures are randomly selected for verification. Accordingly, a time required for verifying an electronic signature can be reduced while maintaining the advantages of an electronic signature system.
摘要:
A method of and apparatus for installing software for using digital content and are provided. The method of installing software for using digital content includes: transmitting a request for the software; transmitting security information indicating a security status of a device in which the software is to be installed; and receiving the software from an external apparatus that received the request and security information. According to the method and apparatus, the software can be dynamically securely installed, thereby allowing a variety of digital contents to be used and enhancing the utilization of the device.
摘要:
A method of checking revocation of a device and software, and transmitting data to a secure device and secure software whose keys have not been leaked is provided. The method includes receiving authentication information of a device requesting transmission of data, and authentication information of software accessing the data in the device; checking revocation of the device and the software, based on the received authentication information; and transmitting the data to the software of the device, when the device and the software are not revoked as a result of the checking. By doing so, during transmission of data, such as content or a license, it is possible to check security of a device and software being executed in the device, so that the data can be more safely transmitted.
摘要:
Provided are a method and apparatus for controlling an output of a content device. The method includes: receiving a request signal that requests the use of encrypted content; executing software for decrypting the encrypted content in response to the received request signal; and controlling the decrypted content to be output through an output port that is allowed by the executed software.
摘要:
A method and apparatus for reproducing a video using a watermark inserting function. The method of inserting a watermark into a video being reproduced, using an on-screen-display (OSD) data mixer included in a video reproduction apparatus, includes determining a watermark pattern indicating information on reproduction of the original video. The watermark pattern is converted into watermark data capable of being recognized by an OSD data mixer and synthesized with the video being reproduced, using the OSD data mixer.
摘要:
A method and apparatus for managing user devices and contents with quick response (QR) codes. An image of a QR code displayed on a user terminal is captured; the captured image of the QR code is analyzed, and a domain registration request message is generated based on the QR code; and the domain registration request message is transmitted to a domain server, and a domain registration response message is received from the domain server.
摘要:
Provided is a method of inserting authentication code into a data packet. The method includes determining whether to insert authentication code into a data packet based on at least one of an importance of the data packet and a type of the data packet, and inserting the authentication code into the data packet based on a result of the determining.
摘要:
A method of protecting important data in digital content and an apparatus therefor are provided. The method includes: receiving digital content which includes first important data; receiving reference data which includes second important data and authentication data for verifying whether the first important data is modified; and selectively correcting the first important data included in the digital content based on the reference data.
摘要:
A method of transporting an encrypted stream of multimedia content is provided. In the method, when a packet contains data of a predetermined length including selected data from pieces of data corresponding to the multimedia content and a header, key information, and first time information from among pieces of information included in a selected packet from among at least one packet are received, and encryption information is determined from the key information and the first time information, according to a key derivation function. The first time information is variable with time. The at least one packet including data corresponding to the multimedia content is encrypted using the encryption information. The at least one encrypted packet and the key information are transported.