摘要:
Provided are an apparatus and method for determining the integrity of content in at least one packet of a plurality of packets. A content using apparatus includes a receiver which receives a transport packet including content in at least one packet and a secret set, which includes an integrity check key generated for determining the integrity of the content, and extracts the secret set by processing the transport packet, a storage unit which stores the secret set, a controller which uses the secret set to determine whether each packet having the content maintains integrity, and a data processing unit which processes the at least one packet if the at least one packet is determined to be maintaining integrity. Accordingly, when content is transmitted, the integrity of the content can be checked using only a small amount of transmission data and a small amount of computation.
摘要:
A method and apparatus for managing digital content are provided. The apparatus for managing digital content generated by applying digital rights management (DRM) includes: a content execution unit executing digital content; and a control unit confirming whether or not digital content is in a first period in which the digital content can be normally executed, and controlling the content execution unit so that, if the digital content is in the first period, the digital content can be executed normally, and if the digital content is in a second period which is not in the first period, the digital content can be executed in a manner which can be distinguished from that of execution in the first period. According to the apparatus and method, execution of digital content, which is close to expiration, can be controlled, thereby managing the expiration of the digital content for a user.
摘要:
Provided are a method and apparatus for mutually authenticating devices in a group and reproducing content using public broadcast encryption. The method of authenticating a first device and a second device includes acquiring specific information of the second device from the second device, transmitting data, containing the acquired specific information of the second device and specific information of the first device, by encrypting the data using a broadcast public key of a group to which the second device belongs, and determining whether authentication of the first device succeeds by decrypting the encrypted data by using a private key of the second device. If authentication succeeds, receiving the specific information of the first device, which is encrypted by using a temporary common key by using the decrypted data, and authenticating the second device by decrypting the encrypted specific information of the first device by using the temporary common key.
摘要:
Disclosed are a method and apparatus for storing digital content in a storage device. A content key, which is a key used by a host for encrypting content when the content is stored to a storage device connected to the host, is encrypted by using a storage key of the storage device. The encrypted content key and encrypted content are stored in the storage device, and the host only stores storage keys. Thus, quantity of information maintained by the host can be reduced. Also, when a storage key is stored in a portable security component (PSC), portability and mobility of content bound to a single host may be improved.
摘要:
Provided are a method of issuing a DRM (digital rights management) key by using a CE (consumer electronics) device management server. The method includes: authenticating the CE device; if authentication of the CE device succeeds, transmitting a request for issuing the DRM key to a key server for storing and managing the DRM key; receiving the DRM key from the key server; and transmitting the DRM key to the CE device. Thus, the CE device can conveniently and safely receive the DRM key.
摘要:
Provided are a method and apparatus for controlling transmission of content data. In the method, a communication channel is initially established to transmit the content data, the content data is transmitted through the established communication channel, verification is performed a plurality of times to determine whether the content data is transmitted within an acceptable transmission range, and whether to continue the transmission of the content data is determined according to the verification result. Accordingly, when a client moves to a location outside a predetermined acceptable transmission range in a wireless environment, a server stops transmission of the content data. In addition, content data can be continuously transmitted regardless of interference caused by a temporary obstacle between a server and a client.
摘要:
A method and apparatus for encoding data, and a method and apparatus for decoding data. The method of encoding data including generating first encoded data by encoding input data, dividing the first encoded data into a plurality of segments, and generating second encoded data by combining the plurality of segments and dummy data.
摘要:
A method and apparatus for generating a content identifier and preventing alteration of the content identifier are provided. The method includes generating at least one random number, generating location information for designating a plurality of locations within a content by using the at least one generated random number, extracting a plurality of parts of the content, which correspond to the generated location information, from the content, generating a integrity verification value based on the extracted parts of the content, which correspond to the generated location information, and generating the content identifier having the integrity verification value and the at least one generated random number.
摘要:
A method and apparatus for managing a client revocation list are provided. The method includes receiving a first client revocation list from a server; and selectively discontinuing an operation of a client, based on the first client revocation list. By doing so, the method and the apparatus can securely control contents.