Jinyoung Moon

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To prohibit the unauthorized accesses on premium contents of the Pay-TV system, a conditional access system (CAS) scrambles the contents with a scrambling key. In order to securely send the scrambling key for descrambling, the CAS transmits the scrambling key after encrypting it with another encryption key. The encryption keys are generally transmitted by(More)
Web services is an emerging technology of distributed computing as an interoperable means integrating loosely coupled web applications. The current basic Web services standards SOAP, WSDL and UDDI are not sufficient to fully support the complete business process. To support the business process, several specifications related to the Web services(More)
An IPTV system that transmits multimedia contents through the IP network needs to adopt a conditional access system allowing the only entitled subscribers to view the premium content as other pay-TV systems do. Although several standard specifications have been published for interoperable models of conditional access systems, the proposed models are based(More)
An IPTV system that transmits contents through anIP network needs to adopt a conditional access system allowingonly authorized subscribers to view premium content as inother Pay-TV systems. IPTV systems adopting one ofconditional access systems provided by a specific major vendorhave a difficulty in changing the conditional access systemloaded on a set-top(More)
As the demands for video surveillance cameras and systems have been greatly increased, more sophisticated techniques for handling video clips from static cameras are required. Trajectory retrieval is one of the relevant applications that exploit such video clips. In this paper, we introduce a system for retrieving object trajectories shown in video clips,(More)
OBJECTIVES To investigate the efficacy and safety of trimethoprim/sulfamethoxazole (TMP-SMX) as primary prophylaxis for pneumocystis pneumonia (PCP) in patients with rheumatic diseases receiving high-dose steroids. METHODS The study included 1522 treatment episodes with prolonged (≥4 weeks) high-dose (≥30 mg/day prednisone) steroids in 1092 patients over(More)