• Journal of KIISE:Information Networking
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• v.27 no.1
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• pp.48-57
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• 2000

The need for high bandwidth, very dynamic secure internet multicast communications is increasingly evident in a wide variety of commercial, government, and internet communities. One of the most recently researches is mainly about the group key distribution schemes[1,3,4,5]. In this paper, we survey related group key distribution schemes and propose a new scalable distributed group key distribution scheme which is one of the most important parts in internet multicast environment. Then, we add this scheme to the existing multicast applications and analysis the test results. The proposed SDGD minimizes the times required to distribute and redistribute keys for joining and leaving the multicast group.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.7
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• pp.1229-1236
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• 2006

Group oriented multicast service is a prerequisite for the current application system for remote lecture and customer service. IP multicast is used to be generally accepted as an internet standard. IP multicast which is designed to support network based replication model can efficiently use host and network resource, however it has some weak points that it has to support IP multicast in the internet by adding multicast-capable internet infrastructure such as router and is vulnerable to security by using public IP address for group identifier. Therefore we propose the trigger based application level multicast model that can enhance both scalability and security by separating the functions, which send and receive message to solve these problems. Our suggested model is expected to ensure the promotion of quality of service and reliability.

• TTA Journal
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• s.89
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• pp.137-145
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• 2003

• Journal of the Korea Institute of Information Security & Cryptology
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• v.10 no.2
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• pp.31-42
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• 2000

특성 사용자 그룹에게만 음성과 영상 데이터를 전송할 수 있는 통신 메커니즘을 가진 멀티캐스트는 유니캐스트와 비교해서 통신 링크의 수가 상당히 많으므로 부당한 공격자로부터 신분위장 서비스 부인 공격과 재전송 공격 부인, 트래픽 관찰 공격을 받기가 쉽다. 그러므로 본논문에서는 현재 멀티캐스트 통신을 위해서 제안 및 사용되고 있는 여러 가지 멀티캐스트 라우팅 프로토콜 중에서 보다 효율적인 보안 체계를 구성할 수 있는 공유 트리를 기반으로 하는 코어 기반 트리(CBT: Core Based Tree)를 이용하여 3개로 구성된 그룹키 KEK TEK을 획득함으로서 안전한 멀티캐스트 통신이 가능한 키 분배 프로토콜을 설계하였다 그리고 패트리넷을 이용하여 안전성을 검증하였다.

• The KIPS Transactions:PartC
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• v.9C no.3
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• pp.323-330
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• 2002

Multicast services are gradually diversified and used widely. Proportionately, they become the center of attackers' attention and there are growing possibilities of an intelligence leak. Therefore, research related to secure multicast should be required to provide multicast service efficiently. This paper presents the architecture for secure multicast which provides efficient group management mechanism in group consists using member's dynamic join and leave. This architecture can provide secure multicast services to many users with regard to security aspects in one-to-many communication. The simulation results show that the proposed architecture achieves an efficient group management and a secure data transmission with low latency compared with the other existing secure multicast architecture.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.1
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• pp.436-444
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• 2011

As practical use degree of multicasting increase, security for multicast is recognized as an important issue. Previous research in the area of secure multicast has mainly focused on group key management. The most important thing about the security of multicast is that only authorized members of this group will be able to access the data. The member of access to multicast communication is to use cryptography with a common shared session encryption key. We propose decentralized group key management based on agent for dynamic multicast with large groups and frequent joins or leaves in this paper. Whole group divide to several subgroup using agent technology and each agent manage members of each subgroup. Also, when rekeying updates that using one-way hash function can prevent the key exposure, and reduce the key distribution delay.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.106-108
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• 2005

멀티캐스트 환경에서 비밀키를 관리하는 방법은 않은 연구가 이루어져 왔지만, 대부분 유선 환경에 집중되어 있다. 본 논문에서는 이동 호스트를 지원하는 멀티캐스트 환경을 위한 두 개의 키관리 방법을 제안한다. 하나는 무선 네트워크 구조를 반영하는 트리 기반의 키 관리 방법이다. 다른 하나는 무선 영역과 유선 영역을 구분하여 키를 관리한다. 유선영역은 기존의 논리적 키 관리 방법을 사용하고 무선 영역은 각 셀마다 독립적으로 하나의 그룹키를 관리한다.

• Journal of the Korea Society of Computer and Information
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• v.6 no.2
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• pp.116-122
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• 2001

A conventional multicast secure protocol. MVMRP, CBT is designed for a large scaled r protocol so the PIM-SM (protect Independent Multicst-Sparse Mode) routing protocol which small number of clients, long distance path among the hosts and shortest path routing chara weak point of require it's own Core tree and re-keying when the traffic is pass through the ro In this study, proposes a architect for a licit information secure of join/leave to all the user or on-service user. With proposed architect, subgroups for multicast secure group mana will be divided by RP (Rendezvous-Point) unit and each RP has a subgroup manager. As a result, the transmitting time is shortened because there is no need to data translation by group key on data sending and the whole architecture size is samller than the other multicast secure architecture.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.40 no.1
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• pp.8-14
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• 2003

In this paper, we investigate a rekey mechanism for a secure multicast group communications and relate the mechanism to the loss of information from group key exposal. We also combine cost for the information loss and cost for group key updates and analyze the optimum rekey interval. Using the results of the analysis in this paper, we can manage a secure multicast group efficiently with the minimal cost on the bases of number of group members, each member's security level and withdrawal rates.

• Journal of the Korea Society of Computer and Information
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• v.11 no.6 s.44
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• pp.35-47
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• 2006

In an Ubiquitous Environment, the growth of various services and equipment is forecasted to increase both the multicast users and diverse hacking attacks of the multicast key. Rapid increasing of multicast users and application security protocols reduce the performance of the Central key management system. Accordingly. We propose to elevate the functionality of the key management mechanism for greater efficiency and stability of the multicast services. in this paper The existing key management mechanism comparison and simulation will analyze these problems. We propose the advanced SMKD (Secure Multicast Key Distribution) mechanism application of the small group and key length control new security protocol by methods to solve these problems. The SMKD Model in this paper will help reduce loading the key distribution and encryption execution of a central key management system, and this model can also ensure stability to a central key management system by efficient key management.