• KDI북한경제리뷰
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• v.23 no.9
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• pp.67-80
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• 2021

북한은 최근 당중앙위원회 제8기 제3차 정치국 확대 회의에서 주민들에게 필요한 소비품의 생산을 늘리기 위해 경공업 공장들에 원자재들을 우선 보장하는 규율을 확립하고, 소비품 생산과 공급을 계획적으로 실속 있게 조직하여야 한다는 것에 대하여 언급하였다. 이것은 코로나19로 모든 무역활동이 중지된 상황에서 필수품의 생산을 늘려 이에 대한 내수시장을 일정 정도 확보하려는 의도로 해석된다. 본고에서는 원자재 구매, 생산과 판매 등 은행을 통한 북한의 기업관리에서 수요자와 공급자 간에 실질적으로 적용되는 다양한 결제방법을 계좌(돈자리) 개설, 제출 단위와 적용 근거, 해당 서류들을 따라가며 고찰함으로써 북한기업의 실질적 운영에 대한 구체적인 이해를 돕고자 한다. 자료로는 관련 도서와 문헌, 북한 관련법, 간행물 등을 참고하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.5
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• pp.812-817
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• 2018

Blockchain technology removes the central system and connects each block throughout every person. This paper proposes new method to exploit the blockchain feature to apply existing donation system. In the current system, the donator does not donate to poor neighbor which means donator must have to donate some donate organization. The donator does not recognize how the donation has been spent after donation. In this case, we can solve that problem by using the blockchain where the donator can watch how the money works and everyone can browse the account history. To make a virtual fundraising box based on blockchain technology, donator sends some money at virtual account and exchanges the money to crypto-currency. Donator can use crypto-currency which is donate to poor neighbor that poor neighbor can exchanges crypto-currency to the money. Through this proposed system, the donation is managed by secure and transparent blockchain system.

• Journal of the HCI Society of Korea
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• v.14 no.2
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• pp.61-69
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• 2019

Recently, as a new ICT trend, emerging chatbots are actively introduced in the field of finance. Chatbot conducts services through the interaction of communication with users. The purpose of this study is to investigate the effect of interaction dialogue type on the efficiency, usability, sensibility and perceived security of financial service chatbot. Based on theoretical considerations, I have divided into closed conversation, open conversation, and mixed conversation type based on the conversation style based on the implementation method of chatbot. Three types of Financial Chatbot prototypes were made and the experiments were conducted after account inquiry, account transfer, Q & A financial task execution. As a result of experimental research analysis, chatbot's interaction dialogue type was found to affect efficiency and usability. Users have shown that the interaction of closed conversations and mixed conversations is an intuitive interface that allows financial services to be easily manipulated without error. This study will be used as a resource to improve the user experience that requires deep understanding of financial chatbot users who should consider both the emotional element of artificial intelligence that provides services through natural conversation and the functional elements that perform financial business can be.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.14 no.1
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• pp.3-13
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• 2004

E-Commerce is suddenly spreading in a daily life. A rights trading system is a system that circulates digital-tickets such as plane tickets, software license, coupon. There are two main approaches so far account-based and smart-card based systems. The NTT Proposed FlexToken, a new smart card based copy prevention scheme for digital rights. They Proposed using pseudonymous self certified keys of Petersen and Horster in order to ensure anonymity of users. However. Petersen and Holster's scheme should register a pseudonymous key pair at TTP (One-time) every time so that users create the signature which is satisfied with unlinkability property In this paper, we propose a new anonymous rights trading system using group signature. This paper has a meaning having applied to digital rights trading system an efficient smart card based group signature.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.20 no.4
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• pp.145-154
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• 2010

End-to-End(E2E) encryption is to encrypt private and important financial information such as user's secret access numbers and account numbers from user's terminal to financial institutions. There has been found significant security vulnerabilities by various hacking in early E2E encryption system since early E2E encryption is not satisfied the basic security requirement which is that there does not exist user's financial information on plaintext in user's terminal. Extensional E2E encryption which is to improve early E2E encryption provides confidentiality and integrity to protect user's financial information from vulnerabilities such as alteration, forgery and leakage of confidential information. In this paper, we explain the extensional E2E encryption technology and present considerable security issues when the extensional E2E encryption technology is applied to financial systems.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.24 no.5
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• pp.591-599
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• 2020

Deep learning is widely utilized to classify or recognize objects of real-world. An abundance of data is trained on high-performance computers and a trained model is generated, and then the model is loaded in an inferencer. The inferencer is used in various environments, so that it may cause unrecognized objects or low-accuracy objects. To solve this problem, real-world objects are collected and they are trained periodically. However, not only is it difficult to immediately improve the recognition rate, but is not easy to learn an inferencer on embedded devices. We propose a real-time handwriting recognizer based on partial learning on embedded devices. The recognizer provides a training environment which partially learn on embedded devices at every user request, and its trained model is updated in real time. As this can improve intelligence of the recognizer automatically, recognition rate of unrecognized handwriting increases. We experimentally prove that learning and reasoning are possible for 22 numbers and letters on RK3399 devices.

• Annual Conference of KIPS
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• 2002.11c
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• pp.2211-2214
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• 2002

사업 영역 확대와 네트워크 발달로 인해 전자상거래(Electronic Commerce)는 점차 국제적 환경으로 확대되고 있으며, 장소나 시간에 구애받지 알고 정보를 전송할 수 있게 되었다. 거래되는 업무가 증가됨에 따라 거래내용, 결제 내용(계좌번호, 카드번호 등), 비밀번호 등 교환되는 정보의 종류도 다양해져 보안의 중요성이 대두되었다. 이에 데이터 사용 효율과 응용 가능성을 높이기 위해 차세대 인터넷 표준으로 대두되고 있는 XML을 메시지 처리 단위로 정의하고, XML 기반의 인터넷 메시징 시스템인 IMSX (Internet Messaging System based on XML)을 설계하였으며, 보안 위협으로부터 대응하기 위해 암호화(Encryption)와 전자서명(Digital Signature) 등의 메시지 레벨의 응용 보안을 적용하였다. 또한 문서 송신, 문서 수신, 검색, 문서 변환, 템플릿(Template) 제공, 보안 서비스 등을 선정하여 구현하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2013.07a
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• pp.225-226
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• 2013

본 논문에서는 스마트폰을 이용한 잔돈 관리 시스템에 대해 제안한다. 현재 동전의 실거래양도 적을뿐더러 사람들의 경우에는 동전이 생겼을 경우 동전을 주머니에 넣고 다니는 불편을 겪고 있다. 이에 스마트폰을 이용하여 잔돈을 직접 받는 것이 아니라 이를 어플을 통해 마일리지 형태로 적립하여 추후에 자신의 계좌로 저금한 금액을 출금할 수 있으며 저금한 금액의 일부를 자동 기부함으로 아름다운 사회 만들기의 일환에 도움이 된다. 이는 동전휴대의 불편함을 개선 가능하고 함부로 사용가능한 동전사용을 막아 저축의 기능도 있으며 동전이 유통되지 않아 계속 더 큰 돈을 들여 만드는 한국은행의 돈을 줄일 수 있을 것으로 예상된다.

• Journal of the Korea Computer Industry Society
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• v.2 no.9
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• pp.1233-1238
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• 2001

Security is very important at EC(Electronic Commerce) Environments. The reason is that exchanged data(that is user private information(accounts, card-no, password), transaction items, etc) is various and is very sensitive. In this paper, we propose the Secure-XML Messaging System(S-XMS) which is implemented to support Message Level Security, Encryption and Digital Signature. And we implement Message Confidentiality Service, User Authentication & Message Integrity Service and Non-Repudiation Service among the various Security Services.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.878-881
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• 2008

In this paper we designed a micro payment service. This service is based on Parlay X web services. In the design process we described a high level functional block architecture. Also, we described the flow of payment and account management for a micro payment service.