• Journal of Korea Society of Industrial Information Systems
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• v.15 no.4
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• pp.1-5
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• 2010

To operate safely VANET applications, authenticaton is necessary to identify val d participants and prevent malicious parties from modifying messages. This paper proposes an efficient authentication protocol for the vehicle registration in VANET environment. The topology of VANET changes rapidly due to high-speed movement of vehicles, thus it is need to reduce the computational burden of the authentication protocol. Therefore, this protocol uses only one-way hash functions and EOR operations to register vehicles.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.829-830
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• 2013

• Proceedings of the SAREK Conference
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• 2006.11a
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• pp.69-69
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• 2006

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 2007.10a
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• pp.392-398
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• 2007

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2013.10a
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• pp.232-235
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• 2013

• Journal of Aerospace System Engineering
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• v.13 no.6
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• pp.60-69
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• 2019

Companies around the world are actively developing Personal Air Vehicle (PAV) to solve the serious social problem of traffic jams. Airworthiness certification for PAV is required, since it is a manned vehicle. As with aircraft, the critical threat to the safe operation of PAV is lightning strike with strong thermal load and magnetic fields. Lightning certification issue also remains important for PAV, since there are still insufficient development of PAV-related lightning certification technologies, guidelines, and requirements. In this study, the SAE Aerospace Recommended Practice (ARP), an international standard certification guideline recognized by the Federal Aviation Administration (FAA), was analyzed. In addition, the guideline of lightning certification was applied to a PAV. The impact of lightning on PAV was also analyzed through computational software. Finally, the basis for the establishment of the PAV lightning certification guidance was presented.

• Journal of Aerospace System Engineering
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• v.12 no.4
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• pp.35-48
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• 2018

The space qualification has to be conducted by a high level of screening to ensure the design margin of devices, materials, manufacturing processes, units, modules, and subsystem or system. The space qualification according to traditional test standards proposed by US military, NASA and ESA involve high cost and tight schedule due to their conservative requirements. It is necessary to develop a space qualification guideline that is cost-efficient and schedule-optimized for the development of domestic satellites. In this study, as a basic research to develop the space qualification guideline, the articles related to space qualification in test standards document released from military and space agency have been investigated. We are planning to utilize the results as a basic database for establishing the independent tailored space qualification guideline.

• Journal of Aerospace System Engineering
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• v.16 no.3
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• pp.35-41
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• 2022

UAM (Urban Air Mobility) is a new safe, secure, and more sustainable air transportation system for passengers and cargo in urban environments. Commercial operations of UAM are expected to start in 2025. Since production rates of UAM are expected to be closer to cars than conventional aircraft, the airworthiness methodology for UAM must be prepared for mass production. Composite materials are expected to be mainly used for UAM structures to reduce weight. In this paper, the composite material qualification method was derived and the materials were applied for small aircraft application. It is expected to reduce the airworthiness certification time by applying composite material qualification system and its database.

• Journal of Aerospace System Engineering
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• v.17 no.1
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• pp.33-41
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• 2023

As seen in the case of the Boeing 737 Max accident, the proportion of aircraft software is rapidly increasing. However, it is vulnerable to safety issues. In case of domestic aircraft software, to operate a Light Unmanned Aerial Vehicle (LUAV) less than an empty weight of 150 kg, safety certification is required for an Ultra-Light Vehicle (ULV). However, software certification procedure is not included. Since the use of LUAVs has increased recently, software verification is required. This paper proposed a checklist of LUAV software that could be applied to LUAV referring DO-178C, an aviation software certification standard. A case study of applying the proposed checklist to the Model-based Development-based Helicopter Flight Control Computer (FCC) project currently used by domestic and foreign advanced companies and institutions was conducted.

• Journal of the Korea Society of Computer and Information
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• v.14 no.3
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• pp.133-138
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• 2009

Recently Lin et al. proposed the remote user authentication scheme using smart cards. But the proposed scheme has not been satisfied security requirements considering in the user authentication scheme using the password based smart card. In this paper, we showed that he can get the user's password using the off-line password guessing attack on the scheme when the adversary steals the user's smart card and extracts the information in the smart card. Also, we proposed the seven security requirements for evaluating remote user authentication schemes using smart card. As a result of analysis, in Lin et al's scheme we have found the deficiencies of security requirements. So we suggest the improved scheme, the mutual authentication scheme that does not store the user's password verifier in server and can authenticate each other at the same time between the user and server.