• Journal of KIISE:Information Networking
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• v.34 no.1
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• pp.1-15
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• 2007

Increase in the wireless mobile network users brings the issue of mobility management into the Virtual Private Network (VPN) services. We propose a provider edge (PE)-based provider provisioned mobile VPN mechanism, which enables efficient communication between a mobile VPN user and one or more correspondents located in different VPN sites. The proposed mechanism not only reduces the IPSec tunnel overhead at the mobile user node to the minimum, but also enables the traffic to be delivered through optimized paths among the (mobile) VPN users without incurring significant extra IPSec tunnel overhead regardless of the user's locations. The proposed architecture and protocols are based on the BGP/MPLS VPN technology that is defined in RFC24547. A service provider platform entity named PPVPN Network Server (PNS) is defined in order to extend the BGP/MPLS VPN service to the mobile users. Compared to the user- and CE-based mobile VPN mechanisms, the proposed mechanism requires less overhead with respect to the IPSec tunnel management. The simulation results also show that it outperforms the existing mobile VPN mechanisms with respect to the handoff latency and/or the end-to-end packet delay.

• Journal of Internet Computing and Services
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• v.14 no.5
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• pp.11-26
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• 2013

In the wireless Internet, it is so restrictive to use the IPSec. The MIPv4 IPSec's path cannot include wireless links. That is, the IPSec of the wireless Internet cannot protect an entire path of Host-to-Host connection. Also wireless circumstance keeps a path static during the shorter time, nevertheless, the IKE for IPSec SA agreement requires relatively long delay. The certificate management of IPSec PKI security needs too much burden. This means that IPSec of the wireless Internet is so disadvantageous. Our paper is to construct the Mobile IPSec proper to the wireless Internet which provides the host-to-host transport mode service to protect even wireless links as applying excellent WP-IBE scheme. For this, Mobile IPSec requires a dynamic routing over a path with wireless links. FA Forwarding is a routing method for FA to extend the path to a newly formed wireless link. The FA IPSec SA for FA Forwarding is updated to comply the dynamically extended path using Source Routing based Bind Update. To improve the performance of IPSec, we apply efficient and strong future Identity based Weil Pairing Bilinear Elliptic Curve Cryptography called as WP-IBE scheme. Our paper proposes the modified protocols to apply 6 security-related algorithms of WP-IBE into the Mobile IPSec. Particularly we focus on the protocols to be applied to construct ESP Datagram.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.4
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• pp.1260-1265
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• 2010

IPSec is the security protocol that do encryption and authentication service to IP messages on network layer of the internet. This paper presents the key recovery mechanism that is applied to IKEv2 of IPSec for mobile communication environments. It results to have compatibility with IPSec and IKEv2, reduce network overhead, and perform key recovery without depending on key escrew agencies or authorized party.

• Journal of KIISE:Information Networking
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• v.34 no.5
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• pp.348-359
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• 2007

The conventional mobile VPN services assumed the mobile communications occur between the MN in foreign networks and the CN in the home network. However, if a MN wants to communicate with another MN in a foreign network, it could degrade the performance of the mobile VPN service because of the triangular routing problem. In this paper, we propose a route optimization mechanism based on the mobile VPN using an x-HA allocated by diameter MIP in order to support the efficient communication between the mobile VPN users in foreign networks. The i-HA maintains the VPN-TIA as well as the x-HoA as the CoAs to solve the security problem and to provide an efficient route optimization simultaneously. Moreover, we proposed revised IPSec tunnel configuration to reduce the IPSec tunnel overheads at a MN when the MN communicates with several MNs in the foreign networks at the same time. The VPN server, a security management entity in the home network, notifies an additional IPSec tunnel establishment between the x-HAs where the communication peers are registered. The simulation result showed that the proposed scheme decreases the end-to-end packet delay time and improves the throughput after the handoff compared to the existing mechanism.

• Review of KIISC
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• v.16 no.1
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• pp.99-111
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• 2006

바인딩 갱신 프로토콜은 이동노드가 흠 링크가 아닌 외부 링크로 이동했을 경우 기존 통신노드와 지속적인 연결을 유지하고 경로를 최적화하기 위한 목적으로 설계된 프로토콜이다. IETF의 모바일 IPv6 표준문서에는 RR(Return Routability) 기법을 이용해서 바인딩 갱신을 수행하도록 권장하고 있다 하지만 RR 기법이 모바일 IPv6 보안 요구사항들을 전적으로 보장하지 않는다. 이 문제점을 해결하기 위해 IETF에서는 RR 기법에 IPsec을 이용하여 바인딩 갱신을 수행할 것을 권장하고 있다. 그러나 단기간의 연결 세션을 갖거나 저전력의 모바일 장치에 IPsec을 사용하는 것은 효율성이 떨어질 수 있다. 이 논문에서는 표준으로 제안된 RR 기법을 비롯하여. RR의 문제점을 해결하고자 제안된 여러 프로토콜을 살펴보고. 각 프로토콜의 안전성과 효율성을 분석한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.6
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• pp.989-1000
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• 2013

Mobile devices use VPN solution to transfer information securely through open network in mobile office environment. In this paper, we propose Pre_Buffered mechanism that improves the throughput of IPSec VPN using low performance H/W crypto Token. Pre_Buffered method precompute key stream, store them in Buffer and use them in IPSec engine for IP packet processing. Moreover, Design, analysis, and experimental results prove the efficiency and feasibility of our proposed method.

• 한국ITS학회:학술대회논문집
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• v.2006 no.10
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• pp.213-217
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• 2006

• Proceedings of the Korea Information Processing Society Conference
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• 2003.11c
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• pp.2013-2016
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• 2003

최근 무선인터넷의 활발한 보급화에 더불어 이동성 단말을 이용한 전자상거래 등이 활발하게 이루어짐에 따라서 개인 데이터 보호 및 안전한 통신을 보장 받으려는 모바일 사용자들의 요구가 급속히 증가하고 있다. 이는 무선매체의 공개성에 따른 보안침해의 용이성과 단말이 이동함에 따른 보안 체계 구축의 복잡성에 기인한다. 이러한 이유로 최근 이동성 단말의 통신에서 보안이 중요한 영역으로 인식되고 있다. 따라서 본 논문에서는 이러한 모바일 환경 특히 향후 전개될 MIPv6(Mobile Internet Protocol version 6) 환경에서의 안전한 데이터 전송을 위해 IP 계층 보안 프로토콜인 IPsec(Internet Protocol security)을 이용한 이동 단말의 안전한 데이터 전송을 테스트하고 향후 MIPv6 에서의 보안성 향상을 위한 방안들을 모색해 보고자 한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.11A
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• pp.1085-1091
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• 2006

For an experiment in this paper, designed test bed to secure confidentiality of data and safe transmission that Mobile node exchanges in Mobile network. And, For IPsec use that support basically in MIPv6, modeling and experimented IKEv2 protocol that is used for reliable authentication key management and distribution between End Point. When Mobile node handoff in Mobile network, analyzed effect that authentication key re-exchange and limited bandwidth that happen often get in key exchange. And studied about Performance and latency about authentication setting and exchange process that use multi interface. To conclusion, when Mobile node transmits using IPSec, re-authentication of key confirmed that re-setting by limit of bandwidth that existent Mobile network has can be impossible. According to other result, proposed MN's multi interface is expected to minimise key exchange latency by hand-off when transmit IPSec.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.2
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• pp.807-810
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• 2005

Constructed network test environment of wireless base for confidentiality guarantee of data and safe transmission that is transmited at Mobile node of Wireless Network environment in this paper. And, progressed research about IKEv2's Multiple-Key Exchange mechanism for efficient security transmission that use IPSec that is built-in to basis to IPv6 of Mobile environment. Have several key to single terminal to solve that is seam at hand off packet transmission process of Mobile Node in Wireless Network and Re-setting for Key and Re-exchange problem that happen frequently and studied technology that move. Key exchange protocol that is used for an experiment loads basically in MIPv6 and used IKEv2 protocol that is used for management and distribution of reliable encryption key between both end. Using network simulator of SSFNet(Scalable Simulation Framework Network Models) in this paper Key exchange delay value of IKEv2's security transmission analyzing comparison Performance measure and studied about problem and improvement way accordingly.