• Asian Journal of Business Environment
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• 제8권4호
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• pp.17-27
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• 2018

Purpose - Current study aimed at investigating the symbolic and evaluation relevance to global luxury brands as the causes of inducing social identity verification, and also explored whether the social identity verification will affect the attitude toward the brands. Research design, data, and methodology - 323 questionaries from Chinese consumers were used to test hypotheses by structural equation model of AMOS 22.0. Results - First, social identity verification positively affected on the brand attitude. Second, both the symbolic relevance and the evaluation relevance positively affected on social identity verification. Third, the mediation roles of social identity verification were identified. Social identity verification played a full mediation role in the effect of the symbolic relevance on the brand attitude, and played a partial mediation role in the effect of the evaluation relevance on the brand attitude. Conclusions - This study could contribute to the advancement of theory concerned with the roles of consumers' social identity verification which induces positive attitude toward the global luxury brands. Global brand managers in China should try to search ways by which consumers can feel both the symbolic relevance and evaluation relevance to their luxury brands, and should make efforts to improve the symbolic relevance and evaluation relevance to their brand.

• 한국멀티미디어학회논문지
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• 제14권8호
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• pp.1029-1040
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• 2011

스마트카드 기반의 전자신분증은 오프라인과 온라인 신분확인을 위한 대표적인 개인 신분확인 수단으로, IC칩에 카드소유자의 신분확인 정보와 암호기법이나 전자인증서 관리를 위한 암호화 모듈을 포함하게 된다. 개인 식별정보에 대한 빠른 접근성과 신뢰성 및 보안성으로 인해 주요자산에 대한 접근통제를 위해 전자신분증을 도입하려는 공공기관이나 기업들이 증가하고 있다. 본 논문에서는 전자신분증을 이용한 접근통제에서 개인 신분확인을 위한 인증시스템의 구현방안에 대해 제안하고, 효과적인 인증시스템의 운영을 위한 기능적 요구사항들에 대해 논의한다. 이를 위해 본 논문에서는 Personal Identity Verification 시스템 모델을 대상으로 하여 연구하였다.

• ETRI Journal
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• 제38권2호
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• pp.397-404
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• 2016

In group-oriented applications, it is often required to verify a group of signatures/messages. The individual verification of signed messages in such applications comes at a high cost in terms of computations and time. To improve computational efficiency and to speed up the verification process, a batch verification technique is a good alternative to individual verification. Such a technique is useful in many real-world applications, such as mail servers, e-commerce, banking transactions, and so on. In this work, we propose a new, efficient identity-based signature (IDS) scheme supporting batch verifications. We prove that the proposed IDS scheme and its various types of batch verifications is tightly related to the Computational Diffie.Hellman problem under a random oracle paradigm. We compare the efficiency of the proposed scheme with related schemes that support batch verifications.

• 대한안전경영과학회지
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• 제19권2호
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• pp.117-133
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• 2017

The purpose of this study is to consider the relation between the deciding factors of local identity and local image improvement. To achieve this purpose, the deciding factors of local identity have been set as the following four: historical identity, cultural identity, (nature) scenery identity, and industrial identity. The writer has established a model to represent the relation between these factors and the local image improvement, namely 'Visitor Satisfaction' and 'Revisit Intentions', and framed a hypothesis for empirical verification. The study results are as follows: First, the deciding factors of local identity which this study addressed are empirically proven to have a significant effect on the visitor satisfaction and the intention to revisit in which is it likely that the greater the impact of the deciding factors, the higher the visitor satisfaction and revisit intentions would be. Second, the deciding factors of local identity, it appears that the 'historical identity' factor had the largest impact on the visitor satisfaction, and the 'cultural identity' factor had the largest impact on the revisit intentions. Therefore, of the four deciding factors, the 'historical identity' should be considered the highest priority to increase the visitor satisfaction, and the 'cultural identity' should be considered the highest priority to increase the revisit intentions. Third, based on the verification of the relation between the visitor satisfaction and revisit intentions, it can be presumed that the greater the visitor satisfaction, the higher the revisit intentions would be.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제7권10호
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• pp.2544-2560
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• 2013

As a cornerstone of the next generation air traffic management (ATM), automatic dependent surveillance-broadcast (ADS-B) system can provide continual broadcast of aircraft position, identity, velocity and other messages over unencrypted data links to generate a common situational awareness picture for ATM. However, since ADS-B messages are unauthenticated, it is easy to insert fake aircrafts into the system via spoofing or insertion of false messages. Unfortunately, the authentication for ADS-B messages has not yet been well studied. In this paper, we propose an efficient broadcast authentication scheme with batch verification for ADS-B messages which employs an identity-based signature (IBS). Security analysis indicates that our scheme can achieve integrity and authenticity of ADS-B messages, batch verification, and resilience to key leakage. Performance evaluation demonstrates that our scheme is computationally efficient for the typical avionics devices with limited resources, and it has low communication overhead well suitable for low-bandwidth ADS-B data link.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권12호
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• pp.6243-6259
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• 2019

As a foundation of next-generation air transportation systems, automatic dependent surveillance-broadcast (ADS-B) helps pilots and air traffic controllers create a safer and more efficient national airspace system. Owing to the open communication environment, it is easy to insert fake aircraft into the system via spoofing or the insertion of false messages. Efforts have thus been made in academic research and practice in the aviation industry to ensure the security of transmission of messages of the ADS-B system. An identity-based batch verification (IBV) scheme was recently proposed to enhance the security and efficiency of the ADS-B system, but current IBV schemes are often too resource intensive because of the application of complex hash-to-point operations or bilinear pairing operations. In this paper, we propose a lightweight IBV signature scheme for the ADS-B system that is robust against adaptive chosen message attacks in the random oracle model, and ensures the security of batch message verification and against the replaying attack. The proposed IBV scheme needs only a small and constant number of point multiplication and point addition computations instead of hash-to-point or pairing operations. Detailed performance analyses were conducted to show that the proposed IBV scheme has clear advantages over prevalent schemes in terms of computational cost and transmission overhead.

• 지능정보연구
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• 제29권2호
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• pp.189-217
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• 2023

메타버스는 아바타를 이용하여 사회적, 경제적, 문화적 활동을 하게 되는 가상의 세계이며, 아바타는 가상 세계에서 나를 대신하는 '또 다른 자신'이다. 최근 메타버스는 전 세계적으로 관심을 받고 있으나, 메타버스 내에서 아바타를 통해 구현되는 정체성을 탐구하는 연구는 부족한 실정이다. 본 연구는 메타버스에서 아바타 사용 관련 네 가지 IT 아티팩트 특성(아바타 표현, 아바타 공현존감, 아바타 프로파일링, 아바타-공간 상호작용)이 지각된 아바타 정체성 확인을 매개하여 메타버스 사용에 대한 만족도와 지속 사용 의도에 미치는 영향에 대해 조사하였다. 이를 위해 제페토 플랫폼 유경험자 196명을 대상으로 설문을 실시하였으며 구조방정식 분석을 통해 가설을 검증하였다. 분석 결과에 따르면, 아바타 표현, 아바타 프로파일링, 아바타-공간 상호작용을 가능하게 하는 IT 아티팩트의 사용이 지각된 아바타 정체성 확인에 긍정적인 영향을 주는 것으로 확인되었다. 이렇게 충족된 자기 확인은 지속 사용 의도에 만족도를 거쳐 간접적으로 영향을 주는 것이 확인되었다. 본 연구는 처음으로 메타버스 내 아바타에 투영한 정체성에 영향을 미치는 메타버스 기술 요소들을 검증하였다는 점에서 학문적으로 기여를 한다. 또한 메타버스 플랫폼 기업에게 메타버스를 디자인하고 구현하는 데 있어서 효과적인 가이드를 제공할 것으로 기대된다.

• Journal of Yeungnam Medical Science
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• 제39권2호
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• pp.98-107
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• 2022

Background: Stroke patients usually experience damage to multiple functions and a long rehabilitation period. Hence, there is a large volume of patient clinical information. It thus takes a long time for clinicians to identify the patient's information and essential pieces of information may be overlooked. To solve this, we stored the essential clinical information of stroke patients in a blockchain and implemented the blockchain technology using the Java programming language. Methods: We created a mini blockchain to store the medical information of patients using the Java programming language. Results: After generating a unique pair of public/private keys for identity verification, a patient's identity is verified by applying the Elliptic Curve Digital Signature Algorithm based on the generated keys. When the identity verification is complete, new medical data are stored in the transaction list and the generated transaction is verified. When verification is completed normally, the block hash value is derived using the transaction value and the hash value of the previous block. The hash value of the previous block is then stored in the generated block to interconnect the blocks. Conclusion: We demonstrated that blockchain can be used to store and deliver the patient information of stroke patients. It may be difficult to directly implement the code that we developed in the medical field, but it can serve as a starting point for the creation of a blockchain system to be used in the field.

• 한국컴퓨터정보학회논문지
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• 제27권5호
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• pp.127-138
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• 2022

본 논문에서는 금융권 DID(Decentralized Identity) 서비스 체계의 표준 방식을 준수하는 가운데 체계적인 검증 방식을 통하여 개인 정보나 자격 증명을 유연하게 제어할 수 있는 블록체인 기반의 DID 서비스인 FinDID(Financial Decentralized IDentity)를 제시한다. DID는 특정 인증기관 없이 탈중앙화 환경에서 활용하는 신원 관리 체계이며, 사용자가 자신의 정보를 제어할 수 있는 기술로서 사용자 자신의 개인정보에 대한 자기 주권화를 실현할 수 있다. FinDID을 통하여 사용자는 자신의 여러 개인정보를 인증하는 크리덴셜을 발급자에게 발급받아 개인 전자지갑을 이용해 타겟금융 서비스가 필수적으로 요구하는 클레임만을 크리덴셜에서 선택하여 프레젠테이션을 생성하고, 이를 금융 서비스에게 제출하여 자신의 서비스 이용자격을 부여받는다. FinDID는 전자지갑, 크리덴셜 발급자, 크리덴셜 저장소 그리고 DID 관리 컨트랙트 및 크리덴셜 관리 컨트랙트를 포함하는 DID 서비스 및 이러한 서비스 체계를 이용하는 금융서비스로 구성된다. DID 서비스는 각 사용자의 DID를 관리하고 관련된 신원 관리체계의 모든 검증과정을 지원한다.

• Asian-Australasian Journal of Animal Sciences
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• 제23권4호
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• pp.425-429
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• 2010

To develop an efficient DNA typing system for Chinese Holstein cattle, 17 microsatellites, which were amplified in four fluorescent multiplex reactions and genotyped by two capillary electrophoresis injections, were evaluated for parentage verification and identity test. These markers were highly polymorphic with a mean of 8.35 alleles per locus and an average expected heterozygosity of 0.711 in 371 individuals. Parentage exclusion probability with only one sampled parent was approximately 0.999. Parentage exclusion probability when another parent' genotype was known was over 0.99999. Overall probability of identity, i.e. the probability that two animals share a common genotype by chance, was $1.52{\times}10^{-16}$. In a test case of parentage assignment, the 17 loci assigned 31 out of 33 cows to the pedigree sires with 95% confidence, while 2 cows were excluded from the paternity relationship with candidate sires. The results demonstrated the high efficacy of the 17 markers in parentage analysis and individual identification for Chinese Holstein cattle.