• Digital Contents
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• no.4 s.143
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• pp.108-111
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• 2005

이 세상에 완전히 새로운 창작물이 있을까? 현존하는 대부분의 창작물은 그 이전의 창작물을 학습하고 분석해서 그 토대 위에 보다 발전적으로 또는 개성 있게 표현한 것들이다. 지난 호에서 설명한 바와 같이, 저작권법은 특허법과 달리 창작성이 있는 표현(expression)을 보호하고 아이디어(idea) 자체는 보호하지 않는다. 그 이유로서, Idea는 창작이라는 빌딩을 지을 때 가장 기초가 되는 벽돌(building blocks)의 역할을 하는 것으로 그 도구를 특정인의 독점하에 두지 않고 만인(public)이 자유롭게 이용함으로써 문화, 예술 및 과학의 발전을 도모할 수 있기 때문이다. 영화나 음악과 같은 문학저작물과 달리 소프트웨어나 게임은 기능성이 강한 저작물로서, 개발자가 소스코드(source code)를 공개하지 않으면 그것의 구조나 운용원리 및 아이디어를 쉽게 이해할 수 없다. 이러한 비공개 소프트웨어의 기능적 구성요소를 이해하기 위해 산업계에서는 역분석(reverse engineering)이란 공정을 활용해 오고 있다. 그런데 아이디어를 얻기 위해 수행된 프로그램역분석 과정은 필연적으로 원프로그램(original program)의 복제를 수반 하게 되므로 그것의 저작권 침해여부가 미국과 유럽 등을 중심으로 뜨겁게 논의돼 왔다. 이에 SW 역분석이 무엇인지 그리고 역분석 을 하면 타인의 저작권을 침해하게 되는 것인지 여부를 소니 플레이스테이션 사건을 중심으로 검토해 봤다. 또한 역분석은 영업비밀을 밝혀내는데 중요한 수단으로서도 사용될 수 있는데, 그것의 법률관계도 함께 살펴봤다.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.277-278
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• 2016

최근 IT 제품의 발달로 무선화, 지능화 등 다양한 분야에서 소프트웨어 활용이 증가하고 있으며, 이에 따라 오픈소스 소프트웨어의 사용이 증가되고 있다. 하지만 공개 오픈소스 소프트웨어는 악의적인 문제 발생 시 일일이 조사, 발견해 낼 수 없는 단점이 있다. 본 논문에서는 안전한 소프트웨어 개발을 위해 정적/동적 취약적 분석을 활용한 취약점 침해여부 판전 모듈 설계를 제안하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.286-287
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• 2016

오픈소스 소프트웨어는 소스코드를 공개해 누구나 제약 없이 소스코드를 보고 사용할 수 있는 오픈소스 라이선스를 만족하는 소프트웨어다. 오픈소스 소프트웨어의 장점은 라이선스 비용절감, 특정 소프트웨어 및 하드웨어의 종속성 탈피, 유연한 연동성, 수 많은 개발자의 참여로 인한 빠른 발전 속도와 신뢰성에 있다. 단점으로는 체계적이지 못하고, 유지보수가 어렵다는 문제가 있다. 본 논문에서 제안한 취약점 침해여부 모델을 이용하게 된다면 오픈소스의 단점을 보완할 수 있다.

• Smart Media Journal
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• v.11 no.5
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• pp.63-74
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• 2022

Initial public offering (IPO) has a legal framework for investor protection, and because there are various quantitative evaluation factors, objective analysis is possible, and various studies have been conducted. In addition, crowdfunding also has several devices to prevent indiscriminate funding as the legal system for investor protection. On the other hand, the blockchain-based cryptocurrency white paper (ICO), which has recently been in the spotlight, has ambiguous legal means and standards to protect investors and lacks quantitative evaluation methods to evaluate ICOs objectively. Therefore, this study collects online-published ICO white papers to detect fraud in ICOs, performs ICO fraud predictions based on BERT, a text embedding technique, and compares them with existing Random Forest machine learning techniques, and shows the possibility on fraud detection. Finally, this study is expected to contribute to the study of ICO fraud detection based on quantitative methods by presenting the possibility of using a quantitative approach using unstructured data to identify frauds in ICOs.

• The KIPS Transactions:PartC
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• v.8C no.5
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• pp.517-524
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• 2001

There are cases that revoke the certification because of disclosure of private key, deprivation of qualification and the expiration of a term of validity based on PKI. So, a user have to confirm the public key whether valid or invalid in the certification. There are many method such as CRL, Delta-CRL, OCSP for the cert-validation of certification. But these method many problems which are overload traffic on network and the CRL server because of processing for cert-validation of certification. In this paper we proposed the realtime cert-validation of certification method which solved problems that are data integrity by different time between transmission and receiving for CRL, and overload traffic on network and the CRL server based on DARC.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.16 no.7
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• pp.575-597
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• 1991

As an elegant solution of the key management scheme for a conventional cryptosystem. Diffie and Hellman introduced a public key distrbution system, whose security depends on the intractabliity of discrete loganthm problem over a finite field, and since then a lot of vartants of DH KDSS have been proposed. In this paper, we present the systematic approach to analyzing the security of a generalized DH KDS and designing an efficient and secure scheme. We classify vanous attacking methods and point out a possible way to avoid these attacks through the examples of successful attacking methods and point out a possible way to avoid these attacks through the examples of successful attack against those systems proposed so far or designed for this purpose. As security analysis tools, we present the redueiblity test, the information theoretic approach, and the protocol analysis technique, which we apply to variations of DH scheme to examine their security under all possble attacks.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.28 no.6
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• pp.1553-1561
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• 2018

The source code for Android is open and easy to modify depending on the purpose. Recently, this charateristic has been exploited to bypass the runtime protection technique and extract the original executable code. Unfortunately, Android devices are so fragmented that it is difficult to verify the integrity of the system. To solve this problem, this paper proposes a technique to verify the integrity of the execution environment indirectly using the features of the application permission. Before executing the original executable code, it loads and executes the dummy DEX file to monitor for abnormal events and determine whether the system is intact. The proposed technique shows a performance overhead of about 2 seconds and shows that it can detect the bypassing technique that is currently disclosed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.11
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• pp.878-883
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• 2020

Cryptographic algorithms are used to prevent the illegal manipulation of data. They are divided into public-key cryptosystems and symmetric-key cryptosystems. Public-key cryptosystems require considerable time for encryption and decryption compared to symmetric-key cryptosystem. On the other hand, key management, and delivery are easier for public-key cryptosystems than symmetric-key cryptosystems because different keys are used for encryption and decryption. Furthermore, hash functions are being used very effectively to verify the integrity of the digital content, as they always generate output with a fixed size using the data of various sizes as input. This paper proposes a method using RSA public-key cryptography and a hash function to determine if a digital image is deformed or not and to detect the manipulated location. In the proposed method, the entire image is divided into several blocks, 64×64 in size. The watermark is then allocated to each block to verify the deformation of the data. When deformation occurs, the manipulated pixel will be divided into smaller 4×4 sub-blocks, and each block will have a watermark to detect the location. The safety of the proposed method depends on the security of the cryptographic algorithm and the hash function.

• Journal of the Korean Institute of Landscape Architecture
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• v.39 no.6
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• pp.36-45
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• 2011

Public open space(Gong-Gae-Gong-Ji) is an important part of the open-space system in an urban environment. Though part of the private sector, it has a significant public function as there are as always open to the free use of every citizen for rest and amenities. A field survey of the public open space of 71 major buildings was carried out to investigate the actual state of public open spaces in the city of Daegu. As a result of this investigation, several point of issues were discussed. In distribution by 'Gu', newly-emerging sub-centers of Daegu-City, such as Bug-Gu and Dalseo-Gu as well as downtown area have many public open spaces. By the use type of buildings, retail buildings such as shopping centers and SSM account for36.6%, business buildings21.1%, and residential and commercial complexes 15.5%, respectively. Location wise, the front areas accounted for the greatest amount(42.9%) with 1 in side area(20%), and 2 in the front/side area(20%), respectively. Degree of division was 1 spot type(45.7%), 2 division type(35.7%). The misuse of public open space for private use, such as shopping and parking lots, was26.6%. On the basis and analysis of the actual status, 6 improvement devices for public open spaces were suggested: 1) The improvement of the legal regulative system, 2) the establishment of design guidelines and strengthening of deliberation, 3) administrative and financial support, 4) periodic supervision and guidance, 5) installment of signs that shows the space is open for use to every citizen, and 6) the participation of citizens in management of public open space.

• Korean Journal of Social Welfare Studies
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• v.40 no.3
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• pp.69-98
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• 2009

The purpose of this study is to examine the psychosocial adjustment level of adopted children in non-traditional adoption of Korea and to verify the variables which influence their psychosocial adjustment. Moreover, this study concentrates on the parenting style of an adoptive mother and the openness of communication between the adoptive mother and her adopted child. And, six control variables which are individual characteristics of the adopted child and his(her) adoptive mother were utilized. The participants of the this research consisted of 61 adopted children in non-traditional adoption of Korea aged six and above and their adoptive mothers of 61. Door-to-door surveys for data collection were conducted nationally from December of 2007 to February of 2008. As the results of this study, out of 6 behavior problem variables, the adopted child showed the highest points in immaturely dependence, and their social competence was verified to be good. The psychosocial adjustment of the adopted children in non-traditional adoption of Korea showed meaningful differences according to the warmhearted parenting style of the adoptive mother, the openness of adoptive mother-adoptee's communication on both general and adoption related issues, and control variables. It was also verified that the warm-heartedness and the respect for autonomy of adoptive mother's parenting style, openness of adoptive mother-adoptee's general communication, and five control variables were the important variables influencing the psychosocial adjustment of the adopted child in non-traditional adoption of Korea. Accordingly, the adoptive parents' education of parenting for adopted child should be required more professional and individual approach at the adoption practice of Korea.