Sejin

Displaying 1-8 of 8 results

  • White Papers // Jan 2014

    Tight Security Bounds for Triple Encryption

    A blockcipher is said to be secure if there is no known attack faster than exhaustive key search. On the other hand, without utilizing any weakness of a blockcipher, one can recover its secret key simply by trying all possible keys over a small number of plaintext-ciphertext pairs. So the...

    Provided By Sejin

  • White Papers // May 2013

    Secure Business Transaction Models for Trading Game Contents Based on ebXML Applying Web Service Security Standards

    ebXML (Electronic Business using eXtensible Markup Language) is an e-business standard developed by UN/CEFACT and OASIS, which enables enterprises to exchange business messages, conduct trading relationships, communicate data in common terms and define and register business processes using Web services. Web service security technologies emerging recently have extensibility and flexibility...

    Provided By Sejin

  • White Papers // Oct 2012

    The Study on Cooperative Relay Coding in Multicarrier System

    Cooperative relay systems represent a promising solution overcoming the drawbacks of Non-Line-Of-Sight (NLOS) propagation in future wireless communications. In this paper, the authors propose a cooperative relay coding which uses adaptive hierarchical modulation based on Cyclic Redundancy Check (CRC) and Cyclic Delay Diversity (CDD). In the proposed scheme, the system...

    Provided By Sejin

  • White Papers // Oct 2012

    The Study on the Adaptive Hybrid MIMO Cooperative Scheme in Wireless OFDM Systems

    In this paper, a new adaptive hybrid Multiple-Input Multiple-Output (MIMO) cooperative scheme is proposed in wireless OFDM systems. The conventional hybrid MIMO cooperative scheme is inefficient in the relay because the relay does not use one antenna between two antennas for transmission to the destination. So the new hybrid MIMO...

    Provided By Sejin

  • White Papers // Oct 2012

    PWAM: Penalty-Based Weight Adjustment Mechanism for Cooperative Spectrum Sensing in Centralized Cognitive Radio Networks

    Current static spectrum assignment policy leads to the shortage of the spectrum for launching newer telecom cooperation or enhancing the existing ones. To address this issue of inefficient spectrum utilization, a new term Dynamic Spectrum Access has emerged. Cognitive Radio is the most decisive technology for the successful deployment of...

    Provided By Sejin

  • White Papers // Sep 2012

    SNR-Based Adaptive Spectrum Sensing for Cognitive Radio Networks

    Cognitive radios are indispensable to shift paradigm from conventional exclusive spectrum assignment to dynamic spectrum access. They can boost up spectrum utilization significantly, by dynamically accessing unused primary spectrum while bringing no harm to primary users. The envisioned radio calls for fast and accurate spectrum sensing. Researchers are focusing on...

    Provided By Sejin

  • White Papers // Jul 2012

    Efficient Wireless Communication System for Industrial Communications

    IEEE 802.15.4 is a global standard designed for the low power consumption, low cost, and low data rate. Thus, this standard is advantageous to implement Ubiquitous Sensor Network (USN). However, researchers do not have been studied to employ cooperative communication in this system. Cooperative relaying system has been shown to...

    Provided By Sejin

  • White Papers // Mar 2010

    A Secure and Efficient SIP Authentication Scheme for Converged VoIP Networks

    Session Initiation Protocol (SIP) has been widely used in current Internet protocols such as Hyper Text Transport Protocol (HTTP) and Simple Mail Transport Protocol (SMTP). SIP is a powerful signaling protocol that controls communications on the Internet for establishing, maintaining and terminating sessions. The services that are enabled by SIP...

    Provided By Sejin

  • White Papers // Oct 2012

    The Study on Cooperative Relay Coding in Multicarrier System

    Cooperative relay systems represent a promising solution overcoming the drawbacks of Non-Line-Of-Sight (NLOS) propagation in future wireless communications. In this paper, the authors propose a cooperative relay coding which uses adaptive hierarchical modulation based on Cyclic Redundancy Check (CRC) and Cyclic Delay Diversity (CDD). In the proposed scheme, the system...

    Provided By Sejin

  • White Papers // Oct 2012

    The Study on the Adaptive Hybrid MIMO Cooperative Scheme in Wireless OFDM Systems

    In this paper, a new adaptive hybrid Multiple-Input Multiple-Output (MIMO) cooperative scheme is proposed in wireless OFDM systems. The conventional hybrid MIMO cooperative scheme is inefficient in the relay because the relay does not use one antenna between two antennas for transmission to the destination. So the new hybrid MIMO...

    Provided By Sejin

  • White Papers // Jul 2012

    Efficient Wireless Communication System for Industrial Communications

    IEEE 802.15.4 is a global standard designed for the low power consumption, low cost, and low data rate. Thus, this standard is advantageous to implement Ubiquitous Sensor Network (USN). However, researchers do not have been studied to employ cooperative communication in this system. Cooperative relaying system has been shown to...

    Provided By Sejin

  • White Papers // Oct 2012

    PWAM: Penalty-Based Weight Adjustment Mechanism for Cooperative Spectrum Sensing in Centralized Cognitive Radio Networks

    Current static spectrum assignment policy leads to the shortage of the spectrum for launching newer telecom cooperation or enhancing the existing ones. To address this issue of inefficient spectrum utilization, a new term Dynamic Spectrum Access has emerged. Cognitive Radio is the most decisive technology for the successful deployment of...

    Provided By Sejin

  • White Papers // Sep 2012

    SNR-Based Adaptive Spectrum Sensing for Cognitive Radio Networks

    Cognitive radios are indispensable to shift paradigm from conventional exclusive spectrum assignment to dynamic spectrum access. They can boost up spectrum utilization significantly, by dynamically accessing unused primary spectrum while bringing no harm to primary users. The envisioned radio calls for fast and accurate spectrum sensing. Researchers are focusing on...

    Provided By Sejin

  • White Papers // May 2013

    Secure Business Transaction Models for Trading Game Contents Based on ebXML Applying Web Service Security Standards

    ebXML (Electronic Business using eXtensible Markup Language) is an e-business standard developed by UN/CEFACT and OASIS, which enables enterprises to exchange business messages, conduct trading relationships, communicate data in common terms and define and register business processes using Web services. Web service security technologies emerging recently have extensibility and flexibility...

    Provided By Sejin

  • White Papers // Jan 2014

    Tight Security Bounds for Triple Encryption

    A blockcipher is said to be secure if there is no known attack faster than exhaustive key search. On the other hand, without utilizing any weakness of a blockcipher, one can recover its secret key simply by trying all possible keys over a small number of plaintext-ciphertext pairs. So the...

    Provided By Sejin

  • White Papers // Mar 2010

    A Secure and Efficient SIP Authentication Scheme for Converged VoIP Networks

    Session Initiation Protocol (SIP) has been widely used in current Internet protocols such as Hyper Text Transport Protocol (HTTP) and Simple Mail Transport Protocol (SMTP). SIP is a powerful signaling protocol that controls communications on the Internet for establishing, maintaining and terminating sessions. The services that are enabled by SIP...

    Provided By Sejin