• Journal of KIISE:Information Networking
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• v.30 no.5
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• pp.604-613
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• 2003

Network Address Translation-Protocol Translation(NAT-PT) is an IPv4/IPv6 translation mechanism, as defined in RFC2766, allowing IPv6-only devices to communicate with IPv4-only devices and vice versa. But NAT-PT has the restriction that applies to IPv4 NAT where NAT-PT does not provide end-to-end security, which is a major goal of IPSec. Therefore it cannot support security services such as confidentiality, authentication, and integrity. In this paper, we propose secure NAT-PT(SNAT-PT) and the corresponding secure host architecture to support IPSec security service. And also tunneling scheme using dummy IP header is presented to show the valid operation of end-to-end IPSec protocol on the proposed architectures.

• Proceedings of the KIEE Conference
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• 2004.11c
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• pp.123-125
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• 2004

The importance for Internet security has being increased and the Internet Protocol Security (IPSec) standard, which incorporates cryptographic algorithms, has been developed as one solution to this problem. IPSec provides security services in IP-Layer using IP Authentication Header (AH) and IP Encapsulation Security Payload (ESP). In this paper, we propose IPSec cryptographic processor design based AMBA architecture. Our design which is comprised Rijndael cryptographic algorithm and HAMC-SHA-1 authentication algorithm supports the cryptographic requirements of IP AH, IP ESP, and any combination of these two protocols. Also, our IPSec cryptographic processor operates as AMBA AHB Slave. We designed IPSec cryptographic processor using Xilinx ISE 5.2i and VHDL, and implemented our design using Xilinx's FPGA Vertex XCV600E.

• Review of KIISC
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• v.13 no.5
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• pp.24-30
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• 2003

인터넷을 비롯한 대부분의 패킷스위칭 네트워크는 IP(Internet Protocol)을 기반으로 하고 있다. 그러나, IP는 기본적으로 보안에 취약하게 설계되어 보안이 필요한 통신에 사용하는데는 어려움이 있다. IPSec(IP Security)은 IP 트래픽에 대한 이러한 보안문제를 극복하기 위해 생겨났으며, 방화벽과 결합된 형태로 가장 널리 쓰이고 있는 VPN(Virtual Private Network) 제품의 하나이다. 그러나 IPSec의 문제점이 대두되고, Web-based Service가 영역을 넓혀가면서 기존의 웹보안프로토콜인 SSL이 VPN의 새로운 형식으로 나타나고 있다. 본 고에서는 IPSec VPN과 SSL VPN의 차이점의 분석하여 정리하고자 한다.

• The KIPS Transactions:PartC
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• v.10C no.5
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• pp.549-556
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• 2003

In this paper, we describe security policy protocol to provide end-to-end IPSec security service that considers characteristics of NAT-PT. NAT-PT is describing IP address translation and protocol translation for communication on heterogeneous IP network by one of the technology that is proposed by IETF to provide communication between IPv4 and IPv6 network in transitional step to evolve by IPv6 network to IPv4 network. But NAT-PT has the limitation on security one of the essential requirement of Internet. Therefore, we propose the extended security protocol that offers a security policy negotiation that should be achieved for the first time to provide end-to-end IPSec security service that considers NAT-PT in this paper.

• Electronics and Telecommunications Trends
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• v.14 no.6 s.60
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• pp.51-63
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• 1999

IPSEC (Internet Protocol Security) is a network layer security protocol that is designed to support secure TCP/IP environment over the Internet considering flexibility, scalability, and interoperability. IPSEC primarily supports security among hosts rather than users unlike the other security protocols. Recently, IPSEC is emphasized as one of the important security infrastructures in the NGI (Next Generation Internet). It also has suitable features to implement VPN (Virtual Private Network) efficiently and its application areas are expected to grow rapidly. In this paper, the basic concepts and related standard documents of IPSEC will be introduced.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10a
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• pp.760-762
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• 2003

인터넷을 비롯한 대부분의 패킷스위칭 네트워크는 IP(Internet Protocol)을 기반으로 하고 있으나, IP는 기본적으로 보안에 취약하게 설계되어 보안이 필요한 통신에 사용하는데는 어려움이 있다. IPSec(IP Security)은 IP 트래픽에 대한 이러한 보안문제를 극복하기 위해 생겨났으며, 방화벽과 결합된 형태로 가장 널리 쓰이고 있는 VPN(Virtual Private Network) 제품의 하나이다. 그러나 IPSec 자체의 문제점이 대두되고, Web-based Service가 영역을 넓혀가면서 기존의 웹 보안 프로토콜인 SSL이 VPN의 새로운 형식으로 나타나고 있다. 본 고에서는 이러한 SSL VPN의 모델을 IPSec VPN과 비교하여 분석하고자 한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.26 no.11C
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• pp.102-112
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• 2001

This paper analyzes Security Performance and Processing Performance to measure performance between nodes by using AH and ESP protocol. IPsec VPN provides application with security service implemented in IP Layer while traffic cost and packet processing time it increased by encryption, decryption and authentication in AH and ESP. We measured overall packet processing time and IPsec module processing time. The result of the efficiency test showed that the factors of influencing electrical transmission efficiency were the size of electrical transmission packets, codes used for tunnelling, authentication functions, CPU velocity of host7, and the embodiment of IPsec; for a high capacity traffic, IPsec transmission was not appropriate, because transmission velocity was delayed by more than ten times in comparison with Non-IPsec.

• Journal of Digital Convergence
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• v.12 no.8
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• pp.243-248
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• 2014

IPSec provides two services that are authentication header and Encapsulating Security Payload(ESP). In this research work, security issues on the Internet and the basic concept of IPSec are described. Security issues on the Internet are presented and proposed a possible solution for DDoS attack using IPSec. Therefore, this research will be able to contribute for building secure communication against DDoS attack.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.42 no.10 s.340
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• pp.31-38
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• 2005

Ipsec is a security protocol suite that provides encryption and authentication services for IP messages at the network layer of the internet. Internet Key Exchange (IKE) is a protocol that is used to negotiate and provide authenticated keying materials in a protected manner for Security Associations (SAs). In this paper, we propose a dynamic key lifetime change algorithm for performance enhancement of virtual private networks using IPSec. The proposed algorithm changes the key lifetime according to the number of secure tunnels. The proposed algorithm is implemented with Linux 2.4.18 and FreeS/WAN 1.99. The system employing our proposed algorithm performs better than the original version in terms of network performance and security.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.10a
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• pp.199-202
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• 2003

IPsec is a standardization way for protection of IP packets in network layer and it is composed of three protocols that is AH(Authentication Header), ESP(Encapsulation Security Protocol) and IKE(Internet Key Exchange). Before doing encryption and decryption using AH or ESP protocols, both of communicating entities have to share same key safely. IKE protocol works automatically. But it has less interoperability because IKE protocol is not simple. A work which standardize IKEv2 has been done up to now. In this article, we will examine the Cryptographic Algorithms of IKEv2, and describe the AES usage with IPsec, based on the IETF Draft document.