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    • KCI등재후보

      피싱 방지를 위한 암호 알고리듬 및 메신저 구현

      김인태,장준영,이주형,황성운 보안공학연구지원센터 2009 보안공학연구논문지 Vol.6 No.5

      현재의 피싱 대응 방안은 악성코드 차단, 시스템 공격 차단 등의 방법을 사용하고 있다. 그러나 최근 메신저 피싱에는 효과적으로 대응하지 못하는 것으로 분석되었다. 본 연구에서는 메신저 피싱 문제를 효과적으로 해결할 수 있는 방안을 제시하였다. 메신저 사용에 있어서 피싱을 방지하기 위해 사용자의 USB에 저장된 비밀키를 이용하여 로그인시 인증하는 방안과, 사용자의 서명 및 암호화를 통해 메시지 변조 공격에 대응하는 방안을 제시하였다.

    • 韓國經濟發展의 評價

      金仁台 釜山水産大學校 1993 論文集 Vol.49 No.-

      The Korean economy has undergone a radial change and a high economic growth with a big push along many lines that resulted to extend an industrial product and made a large scale of economy in the quantitative side and change the entire economic structure such as an industrial structure and a trade composition, a structure of employment and a structure of industrial technology to high level in the qualitative side. Although there are many problems that can attribute to the rapid growth in macro-economic performance, the economic growth with a coercive capital formation of forced saving, a short growth period and a economic growth policy emphasizing a large enterprise has resulted in a fundamental disequilibrium of industries, regions and social classes and brought about a socio-economic problem with pollutionm, housing transportation and environmental quality in men's economic environment. Problems resulted from a high economic growth are followings : (1) a rapid populous urbanization and density in urban area. (2) a concentration of economic power to the large businesses. (3) a unstabel cooperation between a large enterprise and a small and medium enterprises. (4) a equity problem in income distribution. (5) a public financial monetary and banking policy and a price policy. (6) a mangement of a competing power. (7) a concerns of economic development as a quantitative measurement. (8) a originality and a responsibility of a government role in a economic policy. All these problems result in a structure of fundamental disequilibrium in economy. Essentially an economy plays as a life organization, the economic development and growth must be in a given adequate economic precondition in order to be a sustainable growth and development. As this point, since the early 1960's in Korean economy an authoritative government and policy decision makers has emphasized an economic performance as a quantitative policy effect. This sense of a quantitative consideration or thought should be restricted by the neoclassical economic thought. Furthermore, as neoclassical economic thought, a disequilibrium problem in the socio-economic system and unbalanced growth were neglected as a inconsiderable economic problem because this sense of economy did not consider and emphasize the economic potential power which is a set of related to the social system, the structure of products and productivity. As a result, a disequilibrium problem in society and economy must be redressed to maintain a sustainable economic growth and development itself in long run. Otherwise this disequilibrium results in a inefficiency and a waste of resource and a high rate of social and individual cost and finally, weaken and international competitive power in open economy. Considering the most characteristic of Korean economy as a export-oriented industrialization and the effects of the liberalization on the trade structure it is important to strengthen an international competitive power that is enabled by redressing a disequilibrium in society and economy in a quick access. Therefore it is suggested that a structural disequilibrium in society and economy must be redressed in order to meet the second wave of economic growth with new economic vital power which plays a important role to achieve a spurt and trend of the self-economic development and a sustainable economic development and growth at acceptable level.

    • 現代資本主義經濟의 不均衡構造

      金仁台 釜山水産大學校 1994 論文集 Vol.50 No.-

      The Purpose of this paper is to inquire into the structure of disequilibrium of modern capitalistic economy. As mentioned above, the economic theory or economics as a social science has been developed and systematized for more than two hundreds years with the change of capitalistic society. Economic practices appeared in real life long before any theory about them existed. The major economic ideas and thoughts in ancient days and the middle ages are embodied in religious teaching, codes of law, or moral exhortation. They were not parts of a system thought out as a whole and deliberately installed, but an aggregation of particular ways of meeting practical needs, invented by nobody knows whom. They were tried, modified, combined, retained, or abandoned according to change and circumstance, that is economic ideas and thoughts varied with varing customs and stages of economic development. Thus, the major economic ideas and doctrines from the mercantile system to the present has been developed as follow : 1. Discovery of economy : That is to say, economy was realized as independent and autonomous phenomena in the social phenomena. Economy was separated from study of other aspects of man's behavior, such as his political, social, esthetic, religious, or ethical life. In a sense, economy was free from the religious restraints of the middle ages. 2. Discovery of economic order. 3. Discovery of economic fluctuation. 4. Discovery of economic development. It is said that economics as a social science has started from Adam Smith. The Wealth of Nations set out to explain how the wealth of a nation is increased and how it is distributed_the basic themes of modern economics. The only source of wealth, he maintained, as we do today, is production resulting from labor and resources. The real founder of the classical school of economics, whose writings on the subject have probably had a wider influence over a longer period than those of any other was Adam Smith. After marginal revolution, economists laid the foundations for a more symmetric, general equilibrium analysis that could synthesize, both utility and disutility elements. Particularly, in the deep mathematical analysis of Leon Walras, the analysis of general equilibrium was achieved. All economists are aware of the virtually innumerable interrelationships among the prices, wages, demand curves, supplies, incomes, investment flow, and the other variables they study. It is a characteristic of our subject. The basic concept embracing these interrelationships is the general equilibrium theory constructed by the Leon Walras, a French_born professor of Switzerland's Academy of Lausanne, who wrote in the late 19th century. Walras' system was mathematical, embraced literally millions of equations, and showed how all the variables in the economy could he simultaneously determined. Highly abstract, the system assumed perfect competition, unchanging tastes and a constant technology : it also called for data, both in abundance and kind, that could never possibly be collected, much less proceeded, as Walras Knew. Of course general equilibrium theory was both a great intellectual achievement and a germinal contribution of central importance. It have been derived two handmarks of modern economics : (1) the general, over_all view of the allocation of resources which underlies all economic thinking, and (2) a practical method for measuring economic interrelationships, called the input_output system. Thus Neoclassical_Keynsian synthesis has became mainstream economics. Maintream economics that prevails in the western world. As P.A.Samuelson should say, the fruits of mainstream economics have been the better working of the mixed economy, and the era since Warld WarⅡ has wittnessed a world growth in output and living standards unmatched in recorded history. Even if his gleorify past achievements of capitalism and the era since World WarⅡ, there are many problems confronted with capitalistic society and the dark sides of economic growth in same period. In other words, the problems disclosed in many fields assumed an acute phase, in those problems, a matter of prime importance is widening and deepening of the structure of disequilibrium. The structure of disequilibrium can divide into two parts : First is the disequilibrium in market, second is social disequilibrium. And then, social disequilibrium means imbalance between private capital and social capital, in other words, insufficency of social capital compare to private capital. Consequently, capitalistic society is confronted with a multitude of economic and social problems relating to various phases such as the spatial imbalance of resoures allocation, inequality of economic development of interregional and interindustries, serious social problems caused by considerable insufficient of social over_read capital, over population and over concentration in a special area, public pollutions, frictions among industries, conflict between labor and capital, a change for the worse of quality of life in the course of their development and social development. These circumstances and these sort of things would only aggravated the socio_economics situations. Moreover, those situations threaten to become the gradual worsening of economic activities in every field and socio_economic relations. All of these problems result from the disequilibrium of modern capitalism caused by inefficiency and failure of market mechanism. I have attempted a theoritical study with the relation between economic theory and economic reality, in other words, capitalistic economy, and to present the serious characteristics of those problems, and to suggest a solution for the rational allocation of resources which might maximize the social welfare and economic efficiency, at the same time which might throw light on the possible solution in terms of optimum allocation of resources for the reduction of ineffiency and friction between economic development and social development.

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