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 of processing digital content performed by an apparatus for storing digital content. In the method, a hardware regional code extracted from a memory of a content storage device is compared with a firmware regional code extracted from firmware, and the digital content is selectively encrypted and stored according to a corresponding regional code only when the hardware regional code matches the firmware regional code.
摘要:
Provided are a transport stream structure of image data, a transmitting and receiving apparatus and method thereof. A transport stream structure of image data includes a header compressed by a lossless compression algorithm; an additional information field for additional information of image data, the additional information field being generated based on compressing the header by using the lossless compression algorithm; and a payload including the image data. The transport stream structure of the image data, the transmitting and receiving apparatus and method thereof enables inserting the additional information without changing the size of the related art transport stream structure of the image data.
摘要:
Provided is a method of restricting use of contents in a virtual system comprising at least one virtual machine implemented by applying virtualization technology to a predetermined device. The method includes: reading a first device identifier from the device in order to identify the device; reading a second device identifier, which is a device identifier allocated to the at least one virtual machine, from the at least one virtual machine; determining whether the first device identifier is identical to the second device identifier; and selectively restricting use of contents in the at least one virtual machine based on a result of the determining.
摘要:
Provided are a method and apparatus for encrypting data, and a method and apparatus for decrypting data. The method of encrypting data includes generating an encryption key by using current time information indicating a current time, encrypting data by using the generated encryption key, and transmitting the encrypted data.
摘要:
Watermarking method and apparatus for tracking hacking and method and apparatus for blocking hacking of content are provided. The watermarking method includes: obtaining device information from a reception device, with which content is shared, through a determined network channel; generating watermark data based on the obtained device information; and generating watermarked multimedia content by inserting the generated watermark data into content. The method of blocking hacking of content includes: if hacked content is found, detecting watermark data from the hacked content; detecting transmission and reception device information from the detected watermark data; and extracting a progress route of the content based on the detected transmission and reception device information and performing revocation on a hacked device.
摘要:
A method of restricting operation of a device is provided. Based on a revocation list, which is a list regarding revoked devices, the method determines whether the device is the revoked device, based on the determination, decides whether to operate a Digital Rights Management (DRM) module of the device, and based on the decision, selectively restricts the operation of the device.
摘要:
Provided are a method and an apparatus for communication based on certification using a static identifier and an updatable dynamic identifier allowing a verified client to access a server.
摘要:
An apparatus and method of checking adjacency between devices are provided. A challenge response based round trip time (RTT) checking method includes: generating a random number; encrypting the random number using a symmetrical key; transmitting a challenge request message including the encrypted random number to a device; receiving a challenge response message including the random number from the device which received the challenge request message and decrypted the encrypted random number using the symmetrical key, from the device; and determining an RTT based on a time when the challenge response message is received and a time when the challenge request message is transmitted.