• International Journal of Internet, Broadcasting and Communication
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• v.15 no.3
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• pp.203-210
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• 2023

In this paper, we develope a stock trading system that automatically buy and sell stocks in Kiwoom Securities' HTS system. The system is made by using Kiwoom Open API+ with the Python programming language. A trading strategy is based on an enhanced system query method called a Condition-Search. The Condition-Search script is edited in Kiwoom Hero 4 HTS and the script is stored in the Kiwoom server. The Condition-Search script has the advantage of being easy to change the trading strategy because it can be modified and changed as needed. In the HTS system, up to ten Condition-Search scripts are supported, so it is possible to apply various trading methods. But there are some restrictions on transactions and Condition-Search in Kiwoom Open API+. To avoid one problem that has transaction number and frequency are restricted, a method of adjusting the time interval between transactions is applied and the other problem that do not support a threading technique is solved by an IPC(Inter-Process Communication) with multiple login IDs.

• Proceedings of the Korean Society of Computer Information Conference
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• 2016.07a
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• pp.215-216
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• 2016

본 논문에서는 NFC 모듈과 핸드폰 앱을 이용하여 좀 더 편리하게 원하는 웹페이지로 자동로그인을 해 주는 시스템을 개발하였다. 스마트폰은 NFC를 이용한 아이디와 패스워드를 포함한 데이터 송신하며 라즈베리파이는 이 데이터를 수신하여 연결된 PC에게로 전달한다. PC에서는 AUTOHOTKEY 매크로를 이용하여 원하는 웹페이지를 실행시키고 자동로그인을 수행한다. 이러한 방법을 통하여 스마트폰에 접속 정보만 가지고 있으면 어느 PC에서라도 편리하게 자동로그인할 수 있는 기반 기술을 구현하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.04b
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• pp.1123-1126
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• 2002

현대사회를 살아가는 사람들은 웹 상에서 회원가입을 한 사이트가 한 두 개가 아니고 수 십개씩 가입하고 있다고 생각한다. 그런데 이 많은 사이트에 대한 아이디와 암호를 기억하기란 어렵다. 수첩에 아이디와 암호를 적어서 필요시마다 사이트 찾아가서 아이디와 암호를 입력하고 접속하고 있는 사용자가 있는데 만일 수첩을 잊어버리면 바로 개인보안에 문제가 생길 수 있다. 이러한 불편함을 없애기 위해 사용자가 계정과 함께 암호를 기억하지 않아도 바로 웹에서 원 클릭으로 사용자가 원하는 사이트에 바로 연결하여 login 할 수 있도록 처리 한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.21 no.2
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• pp.49-60
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• 2011

Instant Messenger is one of the most popular communication service when translating message or data each other through Internet. For digital crime investigation, therefore, it is obviously important to obtain communication trace and contents derived from Instant Messenger. This is because that gathering traditional communication histories also have been important until now. However, extracting communication trace and contents are not easy because they are generally encrypted or obfuscated in local system, futhermore, sometimes they are located at server computer for Instant Messenger. This paper researches on extracting communication histories against NateOn, BuddyBuddy, Yahoo! messenger and Mi3 messenger, and obtaining user password or bypassing authentication system to Instant Messenger Service when a user use auto-login option.

• Journal of Practical Engineering Education
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• v.10 no.1
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• pp.1-7
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• 2018

The dual security system that manages user's account information and uses NFC and OTP has been proposed. It also enhances the security of the user authentication phase by using the features that recognize within the range of less than 1m of NFC and the high security of NFC itself. During the graduation work design process which was carried out for one year and six months in a group of two in the electronics engineering major of the four-year undergraduate system was conducted. In the interim results, we participated in the conferences and thesis contest at the Institute of related to major for three times. Finally passed the examination process for three times judged by 6 professors in the major. The results were published in a graduation thesis together with other people who passed and composed in thesis form. Through the experience gained through these stages of design and production, it has gained the confidence to gain employment opportunities and actively pursue the growth stage, and presented a methodology to practice engineering education through employment.