• Title/Summary/Keyword: 유효세션

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Mutual Authentication Protocol based on the Random Divided Session for the Security of Medical Information in Home-Health (홈헬스 환경에서 생체정보전송의 안전성을 고려한 랜덤유효세션기반의 상호인증 프로토콜)

  • Lim, Heon-Cheol;Park, Tae-Hyun;Kwon, Gu-In
    • Journal of the Korea Society of Computer and Information
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    • v.17 no.10
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    • pp.79-88
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    • 2012
  • In this paper, we design a mutual authentication protocol which divided sessions from an authenticated session are updated periodically. And in order to minimize the traffic overhead for session authentication, we also introduce dynamic session management according to sampling rate of medical sensor type. And randomize the divided session time. This model has the effect of blocking the integrity and confidentiality intrusion of rogue gateway. Moreover, efficiency is provided through medical data to be transmitted have different sampling rate. In order to evaluate this model, it was embodied and experimented in TinyOS 2.1 environment. The result, we got an overall validity from three types of experiment.

Mutual Authentication Protocol based on the Effective Divided Session for the Secure Transmission of Medical Information in u-Health (유헬스에서 안전한 생체정보전송을 위한 동적인 유효세션기반의 상호인증 프로토콜)

  • Lee, Byung-Mun;Lim, Heon-Cheol;Kang, Un-Ku
    • The Journal of the Korea Contents Association
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    • v.11 no.2
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    • pp.142-151
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    • 2011
  • All medical information over sensor networks need to transmit and process securely in the u-Health services. The reliability of transmission between u-Health medical sensor devices and gateway is very important issue. When the user moves to other place with u-Health devices, its signal strength is going down and is far from the coverage of gateway. In this case, Malicious user can be carried out an intrusion under the situation. And also rogue gateway can be tried to steal medical information. Therefore, it needs mutual authentication between sensor devices and gateway. In this paper, we design a mutual authentication protocol which divided sessions from an authenticated session are updated periodically. And in order to reduce the traffic overhead for session authentication, we also introduce dynamic session management according to sampling rate of medical sensor type. In order to verify this, we implemented the programs for the test-bed, and got an overall success from three types of experiment.

A Study of Improved Session Management for Mobile Web under BYOD environment (BYOD 환경을 고려한 모바일 웹을 위한 세션 관리 개선 방안 연구)

  • Kim, Young-hun;Park, Yongsuk
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.5
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    • pp.1117-1124
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    • 2015
  • This paper explains a web session management system for mobile web environment with BYOD(Bring Your Own Device). This system operates by enhanced secure session token. This system consists of an unique identifier, time stamp, and encryption algorithm. The Unique identifier in this system classifies each mobile device for web security based on mobile environment with BYOD. And the Time stamp in this system that determine session effectiveness for web security. Also the Cipher algorithm in this system that protects session token information for web security. This paper analysis a security of session management system running on mobile web environment using the simulation techniques. The proposed method is more suitable than the other methods under enviroment mobile web environment with BYOD.

ID-based Self-Delegation and its Applications (ID 기반 자기 위임 기법과 응용)

  • 이정연;천정희;조상래;진승헌
    • Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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    • 2002.11a
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    • pp.401-404
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    • 2002
  • 자기 위임 기법은 사용자의 공인된 하나의 키 쌍을 이용하여 특정 기간이나 목적을 위한 세션키를 생성하여 사용하는 기법이다. 이는 공인키의 사용을 줄임으로서 공인키의 안전성을 향상시킬 수 있을 뿐만 아니라 키의 노출로 인한 손실을 줄일 수 있다. 본 논문에서는 ID 기반 인증 모델에서의 자기 위임 기법을 소개한다. 이 기법을 통한 세션키의 생성 및 사용은 CRL 관리가 없는 ID 기반 인증 모델에서 개인키의 유효기간을 충분히 길게 할 수 있게 한다. 따라서 주기적으로 모든 사용자의 개인키를 갱신하여야 하는 시스템의 부하를 줄일 수 있을 것이다.

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Optimized Multipath Network Coding in Multirate Multi-Hop Wireless Network (다중 전송률 다중 홉 무선 네트워크에서 최적화된 다중 경로 네트워크 코딩)

  • Park, Museong;Yoon, Wonsik
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.37B no.9
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    • pp.734-740
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    • 2012
  • In this paper, we propose a method for throughput improvement in multirate multihop wireless networks with intra-session network coding. A multirate transmission supports several rates so that it has a tradeoff between transmission rate and transmission range, therefore multirate can cope with the performance degradation. We present the rate selection method with intra-session network coding in multirate nodes. The effective transmission rate is calculated by using intra-session network coding, and then its maximum effective transmission rate is selected. Concurrent transmission set is determined by selected transmission rate and then the linear programming is formulated for throughput calculation in multihop wireless networks. We evaluate the performance by using MATLAB and lp_solve programs in two topologies. It is shown that the throughput of the proposed method is improved.

Design and Performance Analysis of Bandwidth-Efficient Handoff Scheme in Proxy Mobile IPv6 Networks (프록시 모바일 IPv6 네트워크에서 대역폭에 효율적인 핸드오프 기법의 설계 및 성능 분석)

  • Yoo, Seung-Beak;Jeong, Jongpil
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.14 no.1
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    • pp.219-236
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    • 2014
  • In this paper, we propose a novel Proxy Mobile IPv6 network bandwidth-efficient handoff scheme. MN are classified into slow and fast one. At first MN should be registered in the microcell for bandwidth efficient handoff scheme. microcell is overlapped to handle the overflow session request which is nested. Overflow session request in macrocell requests to go back from the boundary of the microcell to new microcell. If idle session traffic is in a cell, it is requested by the target microcell. Analysis model was developed, an existing session of the session blocking probability and forcing termination probability of the session request have improved considerably. If the total traffic load of the system is not very large, the proposed scheme has the best bandwidth efficiency and provides better quality of service (QoS) to MN without costs of a lot of processing on the system.

Mutual Identification and Key Exchange Scheme in Secure Vehicular Communications based on Group Signature (그룹 서명 기반의 차량 네트워크에서 상호 신분 확인 및 세션키 교환 기법)

  • Kim, Dai-Hoon;Choi, Jae-Duck;Jung, Sou-Hwan
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.20 no.1
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    • pp.41-50
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    • 2010
  • This paper proposes a mutual identification and session key exchange scheme in secure vehicular communication based on the group signature. In VANETs, security requirements such as authentication, conditional privacy, non-repudiation, and confidentiality are required to satisfy various vehicular applications. However, existing VANET security methods based on the group signature do not support a mutual identification and session key exchange for data confidentiality. The proposed scheme allows only one credential to authenticate ephemeral Diffie-Hellman parameters generated every key exchange session. Our scheme provides a robust key exchange and reduces storage and communication overhead. The proposed scheme also satisfies security requirements for various application services in VANETs.

An Efficient Micropayment System using a Session Key (세션키를 이용한 효율적 소액지불시스템)

  • Jeong Yoon Su;Baek Seung-Ho;Hwang Yoon Cheol;Oh Chung Shick;Lee Sang-ho
    • Journal of KIISE:Information Networking
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    • v.32 no.4
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    • pp.462-470
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    • 2005
  • A hash chain is highly efficient and attractive structure to use in electronic cash. Previous systems using hash chain are used extensively in various cryptography applications such as one-time passwords, server-supported signatures and microments. However, The most hash chain based systems using fro-paid method provide anonymity but have the problem to increase payment cost. Therefore, in this paper, we propose a new hash chain based microment system which improves efficiency using session key and guarantees user anonymity through blind signature in the withdrawal process of the root value without disclosing privacy Information.

Implementation of a Web-based Hybrid Engineering Experiment System for Enhancing Learning Efficiency (학습효율 향상을 위한 웹기반 하이브리드 공학실험시스템 구현)

  • Kim, Dong-Sik;Choi, Kwan-Sun;Lee, Sun-Heum
    • Journal of Engineering Education Research
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    • v.10 no.3
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    • pp.79-92
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    • 2007
  • To enhance the excellence, effectiveness and economical efficiency in the learning process, we implement a hybrid educational system for engineering experiments where web-based virtual laboratory systems and distance education systems are properly integrated. In the first stage, we designed client/server distributed environment and developed web-based virtual laboratory systems for digital systems and electrical/electronic circuit experiments. The proposed virtual laboratory systems are composed of four important sessions and their management system: concept learning session, virtual experiment session, assessment session. With the aid of the management system every session is organically tied up together to achieve maximum learning efficiency. In the second stage, we have implemented efficient and cost-effective distant laboratory systems for practicing electric/electronic circuits, which can be used to eliminate the lack of reality occurred during virtual laboratory session. The use of simple and user-friendly design allows a large number of people to access our distant laboratory systems easily. Thus, self-guided advanced training is available even if a lot of expensive equipment will not be provided in the on-campus laboratories. The proposed virtual/distant laboratory systems can be used in stand-alone fashion, but to enhance learning efficiency we integrated them and developed a hybrid educational system for engineering experiments. Our hybrid education system provides the learners with interactive learning environment and a new approach for the delivery of engineering experiments.

Enhanced Recommendation Algorithm using Semantic Collaborative Filtering: E-commerce Portal (전자상거래 포탈을 위한 시맨틱 협업 필터링을 이용한 확장된 추천 알고리즘)

  • Ahmed, Shohel;Kim, Jong-Woo;Kang, Sang-Gil
    • Journal of Intelligence and Information Systems
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    • v.17 no.3
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    • pp.79-98
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    • 2011
  • This paper proposes a semantic recommendation technique for a personalized e-commerce portal. Semantic recommendation is achieved by utilizing the attributes of products. The semantic similarity of the products is merged with the rating information of the products to provide an accurate recommendation. The recommendation technique also analyzes various attitudes of the customer to evaluate the implicit rating of products. Attitudes are classifies into three types such as "purchasing product", "adding product to shopping cart", and "viewing the product information." We implicitly track customer attitude to estimate the rating of products for recommending products. Also we implement a session validation process to identify the valid sessions that are highly important for giving an accurate recommendation. Our recommendation technique shows a high degree of accuracy as we use age groupings of customers with similar preferences. The experimental section shows that our proposed recommendation method outperforms well known collaborative filtering methods not only for the existing customer, but also for the new user with no previous purchase record.