• The Journal of Korean Institute of Communications and Information Sciences
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• v.25 no.4B
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• pp.700-707
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• 2000

In this paper, we address vulnerabilities of legacy VOD system and implement secure-VOD system to protect security holes of it. Our secure-VOD system provide user authentication using one-time password, message authentication and encryption/decryption for video server information. To improve security of existing fixed password system, our secure-VOD system use one-time password. Also, our secure-VOD system provides integrity for video server information by generating and verifying message authentication code using HMAC-HAS 160 algorithm. Finally, our secure-VOD system uses RC5 encryption algorithm to guarantee confidentiality for video server information.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.12
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• pp.2657-2662
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• 2010

Demand on information security in mobile devices based control system grows rapidly with a view to counteracting information hacking and leakage. Among these techniques, encryption and authentication are most common. This paper presents CBC-MAC (Cipher Block Chaining-Message Authentication Code) based mobile devices control system. The system is termed as Secure Mobile in Vehicle (SMIV)We use CBC-MAC that is one of the most efficient authentication modes to protect information against any malicious attacks. By sharing the secret key of CBC-MAC between the transmitter and receiver, it asserts authentic information. The proposed system is verified in such a way that we develop mobile devices control system, apply the CBC-MAC algorithm to the control system and validate the received data. Unlike conventional systems where the development of control mechanism in mobile devices based control systems is main concern, this proposed system offers a secure communication link of the data in mobile devices control system and therefore would be useful to the design and implementation of various mobile devices based control systems.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05c
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• pp.2117-2120
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• 2003

Trusted channel provides a means of secure communication and it includes security services such as confidentiality, authentication, and so on. This paper describes the implementation of trusted channel between secure operating systems that integrates access control mechanisms with FreeBSD kernel code[1]. The trusted channel we developed offers confidentiality an4 message authentication for network traffic based on the destination address. It is implemented in the kernel level of IP layer and transparent to users.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.57 no.3
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• pp.327-335
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• 2008

As communication is becoming increasingly prevalent and especially communication architecture is more relying on the open standard communication protocols, the security issues become major concerns. In this paper we consider possible cyber attacks in the applications based on the current distribution communication architecture, and then derive the security goals. Next we propose how the security algorithms can be adapted to achieve these security goals. We intend to adapt the most efficient ways of secure message exchange, taking the resource-constrained FRTUs into account Finally we show some experiments to validate the protocols.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.19 no.6
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• pp.83-92
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• 2009

Ari Juels proposed Yoking-Proof protocol for authenticating multiple tags simultaneously using RFID system. Because common Yoking-Proof methods authenticate by using MAC (Message Authentication Code), it is difficult to apply them to inexpensive tags. It is also difficult to implement common hash functions such as MD5 in inexpensive tags. So, Ari Juels also proposed a lightweighted Yoking-Proof method with only 1 authentication. However, Minimalist MAC, which is a lightweighted MAC used in the proposed method is for single-use, and the proposed structure is vulnerable to replay attacks. Therefore, in this study, the minimalist MAC using Lamport's digital signature scheme was adopted, and a new type of Yoking-Proof protocol was proposed where it uses tags that are safe from replay attacks while being able to save multiple key values.

• Proceedings of the IEEK Conference
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• 2002.07b
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• pp.948-950
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• 2002

IPSec authentication provides support for data integrity and authentication of IP packets. Authentication is based on the use of a message authentication code(MAC). Hash function algorithm is used to produce MAC , which is referred to HMAC. In this paper, we propose a cryptographic accelerator using FPGA implementations. The accelator consists of a hash function mechanism based on MD5 algorithm, and a public-key generator based on a Elliptiv Curve algorithm with small scale of circuits. The accelator provides a messsage authentification as well as a digital signature. Implementation results show the proposed cryptographic accelerator can be applied to IPSec authentications.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2000.10a
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• pp.433-438
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• 2000

Now, It is vulnerabilities and problems of adaption in user identification and authentication on the Web environments; the BAA(Basic Access Authentication) of HTTP1.0 is that use. ID and password is passed with clear-text between client and server, For this enhancement, the DAA(Digest Access Authentication) of HTTP1.1 is that use. password is digested by MAC(Message Authentication Code) mechanism. but, this mechanism is not adapted by venders of Web browsers. This paper propose the lava based user identification and authentication model to resolve the above problems. Proposed systems are applied to the Web environment, since it has independence to web server and client.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.6
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• pp.127-135
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• 2017

Recently, the most brand new vehicles contain a lot of ECU for comfortable and safety driving environments. For efficient communication network among ECUs, almost car manufactures use CAN protocol which enables to decrease the number of communication lines dramatically and ensures higher data transmission reliability. However, CAN dose not ensure authentication of CAN data frame. So it is vulnerable to replay-attack on CAN data frame. This paper proposes the practical message authentication technique for In-vehicle CAN. To transmit data and MAC together, it is very useful to use the short length of MAC after considering limited space of CAN data frame. However to ensure safety of MAC, additional technique is required. We suggested a message authentication technique that can be usefully applied to build a safety network inside the vehicle because it considers limited data payload of CAN.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.12 no.4
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• pp.67-76
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• 2002

Kerberos is designed to provide strong authentication between client and application servers which are working in distributed network environment by using symmetric-key cryptography, and supposed to trust other systems of the realm. In this paper, we design an efficient and strong authentication mechanism by introducing the public/private-key to Kerberos. In the mechanism to make a system more secure, the value of the session key is changed everytime using MAC(message authentication code) algorithm with the long-term key for user-authentication and a random number exchanged through the public key. Also, we employ a mutual authentication method, which is used on challenge-response mechanism based on digital signatures, to improve trust between realms, and present a way of reducing the number of keys by simplifying authentication steps.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.4
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• pp.800-806
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• 2015

WAVE(Wireless Access in Vehicular Environments) system is wireless communication technology that vehicle sends and receives packets between vehicles or between vehicles and infrastructure in a high-speed mobile environment. In this study, we have designed and implemented a CRL(Certificate Revocation List) download protocol that is used to verify certificate revocation status of the other party when the vehicles communicate with WAVE system. This protocol operates over UDP. And to support security features, also, ECDSA(Elliptic Curve Digital Signature Algorithm) is used for mutual authentication and ECIES(Elliptic Curve Integrated Encryption Scheme) is used to ensure the confidentiality. Moreover, this protocol ensures the integrity of data by adding MAC(Message Authentication Code) to the end of packet and support the error and flow control mechanisms.