• Journal of the Institute of Electronics Engineers of Korea TE
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• v.42 no.2
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• pp.29-36
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• 2005

The methode of user authorization used to the cookie, session and database in the blug site using the DHTML editor, frequently, of course, it is the detail and technical authorization methode but the above mentioned the methode to used, usually. But those methode have the problem in the security. In this paper proposed to the new methode of user authorization which it used to cookie, session and database in the using the DHTML editor. The proposed methode confirm to the impossible to the analysis and changing of the cookie information by hacker.

• Convergence Security Journal
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• v.22 no.4
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• pp.179-188
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• 2022

Password authentication schemes (PAS) are the most common mechanisms used to ensure secure communication in open networks. Mathematical-based cryptographic authentication schemes such as factorization and discrete logarithms have been proposed and provided strong security features, but they have the disadvantage of high computational and message transmission costs required to construct passwords. Fairuz et al. therefore argued for an improved cryptographic authentication scheme based on two difficult fixed issues related to session key consent using the smart card scheme. However, in this paper, we have made clear through security analysis that Fairuz et al.'s protocol has security holes for Privileged Insider Attack, Lack of Perfect Forward Secrecy, Lack of User Anonymity, DoS Attack, Off-line Password Guessing Attack.

• The KIPS Transactions:PartC
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• v.13C no.7 s.110
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• pp.843-850
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• 2006

This is devoted to first, to propose a hash chain algorithm that generates more secure key than conventional encryption method. Secondly, we proposes encryption method that is more secure than conventional system using a encryption method that encrypts each block with each key generated by a hash chain algorithm. Thirdly, After identifying the user via wired and wireless network using a user authentication method. We propose a divided session key method so that Although a client key is disclosed, Attackers cannot catch a complete key and method to safely transfer the key using a divided key method. We make an experiment using various size of digital contents files for performance analysis after performing the design and implementation of system. Proposed system can distribute key securely than conventional system and encrypt data to prevent attacker from decrypting complete data although key may be disclosed. The encryption and decryption time that client system takes to replay video data fie is analogous to the conventional method.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 1995.11a
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• pp.294-304
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• 1995

컴퓨터 통신망을 이용하여 메세지를 교환하려는 주체의 신분을 확인하고, 메세지 전송시 예상되는 침입자의 도청을 예방하기위해 메세지의 암호화에 필요한 세션키를 분배하는 것이 인증 프로토콜의 목적이다. 본 논문에서는 Li Gong의 다항식 보간법을 이용한 인증 프로토콜중에서 비밀키의 사전 공유와 인증서버의 고신뢰도의 문제점을 해결할 수 있는 새로운 인증 프로토콜을 제안하였으며. 제안된 프로토콜의 정확성은 GNY로직을 이용하여 분석하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10a
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• pp.316-318
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• 2004

유비쿼터스 네트워크의 보안요구사항을 살펴보면 센서의 위치, 저 전력으로 인한 성능의 제약, 브로트 캐스팅에 의한 통신 등 들 수 있다. 그 중이 논문에서는 저 전력으로 인한 성능의 제약측면을 고려한 상호인증 (Mutual Authentication)프로토콜을 새롭게 제안한다. 상호인증 프로토콜은 RM(Register Manager)와 AM(Authentication Manager)로 구성되며 RM과 AM을 통해 각 센서 노드들의 한정된 전력문제를 해결하였고 가 각 센서노드에서의 메시지의 길이와 오퍼레이션 수를 최소화함으로 전력 낭비를 해결하였다. 또한 제안하는 프로토콜은 센서노드간의 상호인증을 통한 세션키 분배를 통해 안전한 통신이 가능하다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10c
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• pp.547-549
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• 2002

Seo와 Sweeny는 통신 당사자간의 직접적인 세션키(session key) 교환을 위해 SAKA(Simple Authenticated Key Agreement Algorithm)를 제안했다. SAKA는 패스워드(password)를 사용하여 사용자인증 기능을 제공하는 변형된 Diffie-Hellman 키 교환 프로토콜로써, 키 생성 및 사용자 인증 시 요구되는 계산량과 메시지 전송량을 고려할 때 효율적인 프로토콜이다. 그러나, 최근에 Lin은 SAKA의 안전성에 취약점이 있음을 지적하고 개선된 프로토콜을 제안하였다. 본 논문에서는 개선된 프로토콜이 여전히 재전송 공격(replay attack)에 안전하지 않기 때문에 사용자 인증을 제공 할 수 없음을 보인다.

• Journal of Internet of Things and Convergence
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• v.6 no.2
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• pp.93-100
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• 2020

Although various home services are developed as increasing the number of home devices with wire and wireless connection, privacy infringement and private information leakage are occurred by unauthorized remote connection. It is almost caused by without of device authentication and protection of transmission data. In this paper, the devices' secret value are stored in a safe memory of a smartphone. A smartphone processes device authentication. In order to prevent leakage of a device's password, a shadow password multiplied a password by the private key is stored in a device. It is proposed mutual authentication between a smartphone and a device, and session key agreement for devices using recovered passwords on SRP. The proposed protocol is resistant to eavesdropping, a reply attack, impersonation attack.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.9
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• pp.707-714
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• 2013

IoT, which can be regarded as an enhanced version of M2M communication technology, was proposed to realize intelligent thing to thing communications by utilizing Internet connectivity. Things in IoT are generally heterogeneous and resource constrained. Also such things are connected with each other over LLN(low power and lossy Network). Confidentiality, mutual authentication and message origin authentication are required to make a secure service in IoT. Security protocols used in traditional IP Networks cannot be directly adopted to resource constrained devices in IoT. Under the respect, a IETF standard group proposes to use lightweight version of DTLS protocol for supporting security services in IoT environments. However, the protocol can not cover up all of very constrained devices. To solve the problem, we propose a scheme which tends to support mutual authentication and session key agreement between devices that contain only a single crypto primitive module such as hash function or cipher function because of resource constrained property. The proposed scheme enhances performance by pre-computing a session key and is able to defend various attacks.

• Journal of Korea Society of Industrial Information Systems
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• v.18 no.4
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• pp.43-51
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• 2013

This paper proposes the design of protocol management system for aggregationg messages based on certification between vehicles which not only prevents the messages between vehicles from being forged and altered by Sybil attack by authenticating the them, and but also provides the efficient communication by aggregating the redundant vehicle messages which frequently happens when communicating. For this, the proposed system proposes the SKLC(Session Key Local Certificate) design which is a local certificate based on a session key, and the MAP(Message Aggregation Protocol) design which aggregates the redundant vehicle messages. Therefore, when the proposed system checks the certificate of vehicle, it provides the reliable information securely by verifying the integrity of vehicle with a hash function operation, and improves communication efficiency by reducing the processing time.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.1005-1008
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• 2007

모바일 네트워크 환경은 언제 어디서나 네트워크를 사용하는 모바일 서비스를 편리하게 사용할 수 있도록 해준다. 그러나 언제 어디서나 서비스를 제공받을 수 있다는 것은 언제 어디서든지 정보가 누출되거나 왜곡될 위험성 또한 존재하기 마련이다. 특히, 프라이버시 문제가 해결되지 않고서는 우리 일상생활과 융합되어 편리함을 제공해주는 모바일 네트워크 환경이 오히려 모바일 네트워크 감시 체제를 구축하는 심각한 역기능을 초래하게 될 것이다. 모바일 단말기들은 크기와 모양이 다양하고 컴퓨팅 연산 능력이 적은 저성능 휴대 장치들이 많기 때문에, 컴퓨팅 연산이 많이 요구되는 공개키 암호 기술을 저성능 모바일 단말기에 적용하기는 힘든 상황이다. 이에 본 논문에서는 프라이버시 문제를 해결하면서, 컴퓨팅 연산 능력이 적은 저성능 모바일 단말기에 적용할 수 있는 자바 기반의 암호 모듈 및 PKI 기반의 사용자 인증을 제안하고자 한다. 국내 표준 암호 알고리즘(SEED)과 인증서를 기반으로 세션키와 공개키를 조합함으로서 최소한의 암복호화 연산을 통해 인증 및 전자 서명을 제공하며, 이를 대표적인 모바일 단말기인 PDA 환경에서 세션키 분배 및 사용자 인증이 안전하게 이루어짐을 확인할 수 있었다.