Samsung Electronics Co., Ltd.

Dave Ahn

Ji-Young Moon

Young-sun Yoon

Ji-soon Park

Yong-kuk You

Jun-bum Shin

Kyung-soo Kwag

Chi-hurn Kim

Ji-yeon Choi

Sung-hyun Hong

Dong-jin Kang

Kyung-Soo Kwag

Ji-Yeon Choi

The disclosure provides a secure message transmission apparatus and a processing method thereof. A method for processing a secure message may include receiving a message transmitted by a transmission-side terminal and determining whether the message is an encrypted message, by a non-secure message service unit; delivering the encrypted message to a secure message service unit by the non-secure message service unit when the message is the encrypted message; and decrypting the encrypted message, and re-encrypting the decrypted message and transmitting the re-encrypted message to a reception-side terminal, by the secure message service unit.

Secure message transmission apparatus and processing method thereof

A method for generating a transport stream of a server is provided. The method for generating a transport stream of a server which sends broadcasting content to a client device comprises: scrambling broadcasting content by using a specific key; adding at least one content-encryption message which includes the specific key and a device key for obtaining the specific key from the at least one content-encryption message to the broadcasting content so as to generate a transport stream; and sending the generated transport stream to the client device.

Server, client device, method for generating a transport stream thereof and processing the transport stream thereof

A method and apparatus for generating and updating a license for content and for providing content are provided. The method of generating a license includes generating license signature information for authenticating the license; generating use rule information for controlling the use of the content; generating authentication code information for authenticating a coupon for changing at least a portion of the use rule information; and generating key information required for decrypting the content.

Method of generating license, and method and apparatus for providing contents using the same

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Seoul, South Korea

Dave Ahn