• 정보보호학회논문지
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• 제13권5호
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• pp.105-112
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• 2003

본 논문에서는 두 참여자들 사이에 서로를 인증하고 세션키를 공유하기 위하여 패스워드를 이용하는 간단하고 효율적인 두 가지 키 동의 프로토콜(SEKA-H, SEKA-E)을 제안한다. SEKA-H 프로토콜은 프로토콜을 수행하는 중에 공유된 세션키를 검증하기 위해 해쉬 함수를 사용한다. 그리고 SEKA-E 프로토콜은 SEKA-H 프로토콜의 변형으로써 세션키 검증을 위해서 지수 연산을 사용한다. 제안된 프로토콜들은 중간 침입자 공격과 패스워드 추측 공격, 그리고 Denning-Sacco공격에 안전하고 완전한 전방향 보안성을 제공한다. SEKA-H 프로토콜은 기존에 잘 알려진 프로토콜들과 비교하여 구조가 매우 간단하며 좋은 효율성을 갖는다. SEKA-E 프로토콜은 다른 프로토콜들과 비교하여 비슷한 전체 수행 시간을 필요로 한다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2017년도 춘계학술대회
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• pp.305-308
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• 2017

EAP는 확장 가능한 인증 프로토콜로써 다양한 인증 메커니즘을 가진 EAP 메소드를 지원하는 프로토콜이다. EAP 자체는 IP를 통한 전송 환경에 대한 설계가 아닌 인증만을 위한 프로토콜로 디자인되어 있기 때문에, peer와 authenticator 사이의 인증을 마친 이후에 일반적인 데이터 전송에는 사용되지 않는다. EAP의 간결한 통신 구조로 볼 때 EAP 자체는 가볍게 동작할 수 있는 프로토콜이나, 어떠한 EAP 메소드를 선정하여 사용하느냐에 따라 그 절차가 좀 더 복잡해질 수 있다. 특히, 최근에는 IoT 시장이 정착되며 무선환경에서의 데이터 손실이나 변조, 연결의 반복 등으로 인해 잦은 인증환경이 나타난다. 이 때 일부 보안성이 뛰어난 EAP 메소드의 경우에는 복잡한 절차를 이용하는 만큼 가볍고 빠른 통신을 요구하는 일부 IoT 환경에서는 적합하지 않다. 이에 본 논문에서는 기존 EAP의 틀은 건드리지 않으며 잦은 인증 및 빠른 통신을 요구하는 IoT 환경에 적합한 경량 인증 EAP 메소드를 설계한다.

• 한국멀티미디어학회논문지
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• 제15권12호
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• pp.1475-1484
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• 2012

Today many companies introduce new mobile office environments evolved from the recent rapid development in mobile device technologies. Most of the recent mobile office systems use a simple authentication scheme such as ID/Password. This method is easy to use, but it does not consider the user's context. Thus it cannot provide appropriate security service required by the user's proper contexts. Therefore, this paper proposes a context based authentication system which applies security level verification and uses fuzzy algorithm based on the importance of access authority control.

• 한국멀티미디어학회논문지
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• 제22권12호
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• pp.1347-1355
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• 2019

Deep learning approach based on convolution neural network (CNN) has extensively studied in the field of computer vision. However, periocular feature extraction using CNN was not well studied because it is practically impossible to collect large volume of biometric data. This study uses the ResNet model which was trained with the ImageNet dataset. To overcome the problem of insufficient training data, we focused on the training of multi-layer perception (MLP) having simple structure rather than training the CNN having complex structure. It first extracts features using the pretrained ResNet model and reduces the feature dimension by principle component analysis (PCA), then trains a MLP classifier. Experimental results with the public periocular dataset UBIPr show that the proposed method is effective in person authentication using periocular region. Especially it has the advantage which can be directly applied for other biometric traits.

• 정보보호학회논문지
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• 제13권5호
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• pp.17-37
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• 2003

본 논문에서는 인증 및 키 분배 프로토콜에 대한 논리성 검증을 위한 ASVO 로직을 제안한다. ASVO 로직은 기존의 인증 로직 중 하나인 SVO 로직에 대해서 자동 검증을 고려하여 변형 설계한 로직이다. ASVO 로직은 구문적/의미적 구조의 안전성을 갖는 로직으로서. 비교적 간소화된 증명 단계를 갖는다. 또한 Isabelle/Isar 시스템을 이용하여 구현된 Isabelle/ASVO 시스템은 ASVO 로직을 통한 반자동 검증을 지원한다.

• 한국통신학회논문지
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• 제32권8B호
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• pp.521-528
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• 2007

본 논문에서는 SIP 기반의 VoIP상에서 스팸 위협에 대해 분석하고 이를 차단하기 위해 UAS에서 inbound proxy 서버를 인증할 수 있는 발신자 인증 기법을 제안하였다. 제안된 기법은 UAS로 들어오는 메시지가 inbound proxy를 통해 전송됐는지 여부를 검증하기 위해 inbound proxy 서버와 UAS 간 사전에 공유하고 있는 패스워드를 기반으로 HTTP Digest 인증을 적용하였다. 이는 SIP 표준의 큰 수정 없이 쉽게 적용이 가능하고 peer-to-peer로 발생되는 스팸을 효과적으로 차단할 수 있다. 본 논문에서는 상용 망에서 peer-to-peer로 스팸을 발송해보고 제안된 기법을 이용해 스팸이 차단되는 것을 검증하기 위해 오픈 소스를 이용해 구현해 보았다.

• 디지털산업정보학회논문지
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• 제6권3호
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• pp.121-129
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• 2010

For the development of software industry, offers an expanded software authentication scheme caused by the unauthorized copying of software is to reduce the damage to software developers, retail sales and to promote the development of the software industry was studied. Serial Number of the current software registration is conducted in such a simple verification procedure if the Serial Number only illegal and can be installed on multiple computers, such as program code to allow third parties to enter the Serial Number, or the extract can be used without is a reality. The proposed extension to the software authentication system when you install the software, my phone authentication and MAC Address Authentication Service introduced to distinguish normal user, the user of the MAC Address of the server and software development company that was sent to the registered MAC Address of the computer to be run only by the use of genuine software and to make unauthorized copies of software generated by the software developer can reduce the damage of the proposed plan.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권2호
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• pp.1180-1200
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• 2017

Currently, automated payment services provide intuitive user interfaces by adapting various wireless communication devices with mobile services. For example, companies like Samsung, Google, and Apple have selected the NFC payment method to service payments of existing credit cards. An electronic payment standard has been released for NFC activation within Korea and will strengthen the safety of payment service communications. However, there are various security risks regarding the NFC-based electronic payment method. In particular, the NFC payment service using the recently released lightweight devices cannot provide the cryptographic strength that is supported by many financial transaction services. This is largely due to its computational complexity and large storage resource requirements. The chaotic map introduced in this study can generate a highly complicated code as it is sensitive to the initial conditions. As the lightweight study using the chaotic map has been actively carried out in recent years, associated authentication techniques of the lightweight environment have been released. If applied with a chaotic map, a high level of cryptographic strength can be achieved that can provide more functions than simple XOR operations or HASH functions. Further, this technique can be used by financial transaction services. This study proposes a mutual authentication technique for NFC-PCM to support an NFC payment service environment based on the chaotic map.

• 디지털산업정보학회논문지
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• 제7권3호
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• pp.63-74
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• 2011

Credit cards are more convenient than cash of heavy. Therefore, credit cards are used widely in on_line (internet) and off_line in nowadays. To use credit cards on internet is commonly secure because client identification based security card and authentication certificate. However, to use in off_line as like shop, store, department, restaurant is unsecure because of irregular accident. As client identification is not used in off_line use of credit cards, the irregular use of counterfeit, stolen and lost card have been increasing in number recently. Therefore, client identification is urgently necessary for secure card using in off_line. And the method of client identification must be simple, don't take long time, convenient for client, card affiliate and card company. In this paper, we study a reform measure of the structure and transaction process for the safety improvement of a credit cards. And we propose several authentication method of short-and long-term for client identification. In the proposal, the client authentication method by OTP application of smart-phone is efficient nowadays.

• 한국IT서비스학회지
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• 제5권3호
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• pp.173-186
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• 2006

The local public organizations, to secure the Confidentiality, Integrity, Authentication and Non-Repudiation of cyber administrative environment is giving it a try to consolidate the official documents among them by standardizing all the documents into XML formats together with the establishment of the GPKI(Government Public Key Infrastructure). The Authentication System based on the PKI(Public Key Infrastructure) used by the GPKI, however, provides only the simple User Authentication and thus it results in the difficulty in managing the position, task, role information of various users required under the applied task environment of public organizations. It also has a limitation of not supporting the detailed access control with respect to the XML-based public documents.In order to solve these issues, this study has analyzed the security problems of Authentication and access control system used by the public organizations and has drawn the means of troubleshoot based on the analysis results through the scenario and most importantly it suggests the access control model applied with PMI and SAML and XACML to solve the located problem.