• Title/Summary/Keyword: proxy signature

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Authentication Interworking Protocol based on Media Independent Handover in Heterogeneous Networks (MIH 기반의 이기종 네트워크 환경에서 대리 서명을 이용한 인증 연동 프로토콜)

  • Roh, Hyo-Sun;Jung, Sou-Hwan
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.47 no.2
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    • pp.86-94
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    • 2010
  • This paper proposed an authentication interworking protocol (AIP) based on IEEE 802.21 MIH in the heterogeneous networks. The proposed AIP using the RSA signature reduces handover delay time and communication message overhead when the mobile node moves between the heterogeneous networks. It defines new AIP TLV in MIH frame format and uses the MIH Information Server (MIHIS) for proxy signature issue instead of the authentication server for the heterogeneous networks. For low handover delay, the proposed AIP performs pre-authentication processes with MIH protocol before layer 2 handover. Also, this paper analyzed the performance of the handover and compared with the non-secure MIH protocol.

An Efficient Signature Batch Verification System for VANET (VANET를 위한 효율적인 서명 일괄 확인 시스템)

  • Lim, Ji-Hwan;Oh, Hee-Kuck;Kim, Sang-Jin
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.20 no.1
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    • pp.17-31
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    • 2010
  • In VANET (Vehicular Ad hoc NETwork), vehicles can efficiently verify a large number of signatures efficiently using batch verification techniques. However, batch verification performed independently in each vehicle raises many redundant verification cost. Although, an RSU (Road Side Unit) can perform the batch verification as a proxy to reduce this cost, it additionally requires an efficient method to identify invalid signatures when the batch verification fails. In this paper, we analyze several ways of constructing a distributed batch verification system, and propose an efficient distributed batch verification system in which participating vehicles perform batch verification in a distributive manner for a small size signature set. In our proposed system, each node can report the batch verification result or the identified invalid signatures list and the RSU who received these reports can identify the invalid signatures and efficiently exclude them.

An Authentication Protocol Supporting User Device Mobility in CAS-Based IPTV Environments (CAS 시스템 기반의 IPTV 환경에서 사용자 단말 이동성 지원을 위한 인증 프로토콜)

  • Roh, Hyo-Sun;Jung, Seo-Hyun;Yi, Jeong-Hyun;Jung, Sou-Hwan
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.35 no.2B
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    • pp.302-312
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    • 2010
  • Internet Protocol Television (IPTV) service is the convergence service of the telecommunication and broadcasting that provides various bidirectional multimedia contents by IPTV service subscribe's request through the high-speed internet. However, the proposed technologies current do not guarantee the security such as authentication between Set-Top-Box (STB) and the user mobile devices available IPTV service at home domain, and authentication of mobile user device at out of door. This paper proposes the authentication protocol for distributing content securely from STB to the users' mobile devices at home domain and authentication for network access and IPTV service access when the user's mobile device is moved out of the house. The proposed scheme using the proxy signature enables to distribute and protect securely the contents protected through an underlying Conditional Access System (CAS) without re-encrypting then that the existing scheme should employ. Then this protocol supports the authentication scheme to get service access authentication based on network access authentication using the signature, which the STB issued on behalf of the trust authority of IPTV service provider. Also the proposed authentication protocol reduces the total communication overhead and computation time comparing to the other authentication protocol.