Electronics and Telecommunications Research Institute

Jae-Hoon Nah

Seon-Gyoung Sohn

Jung-Chan Na

Byeong-Cheol Choi

Hyeok-Chan Kwon

Byoung-Koo Kim

Yong-Hyuk Moon

Geon-Woo Kim

Seung-Min Lee

Sung-Won Sohn

Boo-Sun Jeon

Dae-Hee Seo

Taek-Yong Nam

Dong-Il Seo

Seoung-Hyeon Lee

Young-Jun Heo

Dong-Ho Kang

Disclosed herein are a one-way data transmission apparatus, a one-way data reception apparatus, and a one-way data transmission/reception method using the apparatuses. The one-way data transmission/reception method uses a one-way data transmission apparatus and a one-way data reception apparatus, and includes receiving data from a high-security zone through a one-way path, generating tag information of the data, sending a message in which the tag information is added to the data to the one-way data reception apparatus, receiving the message from the one-way data transmission apparatus, checking the tag information of the message, and transmitting the data to a low-security zone.

One-way data transmission apparatus, one-way data reception apparatus, and one-way data transmission/reception method using the same

An authentication apparatus for a non-real-time IPTV system decrypts a first encrypted value included in a contents request message received from a device using a preset session key, and then verifies the validity of the contents request message. If the verification results of the contents request message are valid, the authentication apparatus encrypts a variation between timestamps of the authentication apparatus and the device using the session key, and then generates a second encrypted value. After verification information by which the device is capable of verifying the authentication apparatus has been generated using the second encrypted value, the authentication apparatus sends verification information, together with contents corresponding to the contents request message, to the device.

Authentication apparatus and method for non-real-time IPTV system

There are provided an apparatus and method for transmitting data in a network system using network address translation. The method for transmitting data includes the steps of receiving a global network address corresponding to a local network address from a router using network address translation; encoding data using the global network address; and transmitting the encoded data to an external host on the global network via the router. Since the network address to be translated through the network address translation can be anticipated and substituted in real time during the transmission of the data, a variety of security services can be provided without significant modifications to the existing system, and accordingly, it is anticipated that the Internet protocol version 6 can be increasingly used.

Method and apparatus for transmitting data in a system using network address translation

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Daejeon, South Korea

Jae-Hoon Nah