• Journal of Information Technology Services
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• v.17 no.1
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• pp.33-45
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• 2018

Recently, many South Korean firms have suffered financial losses and damaged corporate images from the data breaches. Accordingly, a firm should manage their IT assets securely through an information security investment. However, the difficulty of measuring the return on an information security investment is one of the critical obstacles for firms in making such investment decisions. There have been a number of studies on the effect of IT investment so far, but there are few researches on information security investment. In this paper, based on a sample of 76 investment announcements of firms whose stocks are publicly traded in the South Korea's stock market between 2001 and 2017, we examines the market reaction to information security investment by using event study methodology. The results of the main effects indicate that self-developed is significantly related to cumulative average abnormal returns (CAARs), while no significant effect was observed for discloser, investment characteristics and firm characteristics. In addition, we find that the market reacts more favorably to the news announced by the subject of investment than the vendor, in case of investments with commercial exploitation. One of main contributions in our study is that it has revealed the factors affecting the market reaction to announcement of information security investment. It is also expected that, in practice, corporate executives will be able to help make an information security investment decision.

• Proceedings of the KIEE Conference
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• 2005.07c
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• pp.2019-2021
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• 2005

This paper describes the cut off time and the current characteristics of virgin RCDs and deteriorated ones in the seashore. The RCDs(Residual Current Protective Devices) are used for protecting the human body from electrical shock and for preventing facility accidents. According to the Korean standards, the RCDs are installed in panel boards. When RCDs are installed outside, they must be enclosed inside waterproof cases. In the case that RCOs are employed at temporary power sites and electrical facilities on the road, they are exposed to the external environment. As a result, the RCDs deteriorated in the seashore for 3 months showed high failure rate, while the virgin RCDs all complied with Korean Standard. Considering that the RCDs are used under exposed condition outside, the reliance of RCDs must be ensured by modifying the related regulations and codes and by developing Improved models advanced in their performance.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.46
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• pp.211-235
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• 2010

According to the commercial law in Korea, a marine cargo insurance contractor (policyholder, insured person, agent) has the duty to disclose risks before establishing an insurance contract and the obligation to notify changes in risks after before establishing the contract. Marine cargo insurance policy clauses include one about the obligation to notify changes in risks. This clause assumes that an insurance contract should be implemented according to what has been answered to the important questions asked by the insurer in connection with the insurant's duty to disclose before establishing an insurance contract, and it stipulates that, if any change in what has been disclosed should be notified to the insurer since it is regarded as a change in risks. Neglecting the obligation to notify may lead to the termination of the appropriate insurance contract by the insurer. The problems here concern the clauses about changes in risks and about the obligation to notify. The problems are like these. Can it be that the circumstances which might be seen in the past as changes in risks according to the territorial sea laws and institute cargo clauses stipulated long ago are considered as such still today? And a marine cargo insurance policy till valid when changes in risks have not been properly notified by the original discloser of risks to the insured who currently holds the marine cargo insurance policy, which, unlike other insurance policies, is a marketable security? In Korea, the commercial law has a clause the obligation to notify changes in risks established based on the territorial sea laws and institute cargo clauses. In this regard, this study aims to consider if the clause still valid today or not and, if not, to propose alternatives to the clauses.

• Journal of the Korea Society of Computer and Information
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• v.11 no.1 s.39
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• pp.177-184
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• 2006

The sensors in a ubiquitous network are limited because of the low power and ultra light weight, so many studies have revolved around the sensor. This study improves the process of the registration and authorization and suggests a way to minimize discloser of privacy by using an alias. We introduce RA(Relay Agent) for the restrict function of sensor node, and improve anonymity for private information of each sensor node by assigning alias from SM(Service Manager) in procedure of registration and authentication. The privacy of sensor node is secure in procedure of registration, authentication, and communication between nodes. We could improve the level of security with the only partial increment of computation power of RA and SM without an increase in the amount of sensor nodes.