• The Journal of Korean Institute of Communications and Information Sciences
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• v.24 no.6A
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• pp.894-904
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• 1999

In this paper, a synchronized stream cryptosystem for secure communication in radio channel is designed and its security level is analyzed. The main parts of the proposed cryptosystem consist of synchronization pattern generator, session key generator, and key stream generator. The system performance is evaluated by analyzing the security level depending on the randomness, period, linear complexity, and correlation immunity. Experimental results with image data signal in the 10-1 and 10-2 channel error environment demonstrate the proper operation of the implemented crypto system.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.17 no.6
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• pp.629-639
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• 1992

This paper examines the security vulnerability, demanded service, layering consideration for local area networks(LANs), and proposes a new key distribution system suitable to local area networks. the new key distribution system Is applicable to time quantum in encrytion key and then the time used arid the quantity of encryption message using the encryption key are limited. A system suggested in this paper can achive some higher concurrency of key and authentication of the opposite party. Even through a encryption key expose by reason of wiretapping of a frame unit, It has achived some more security and safety, because the contens of all traffic messages are not known.

• Information and Communications Magazine
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• v.21 no.8
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• pp.107-121
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• 2004

광대역 통합망(BcN: Broadband convergence Networks)이란 통신$.$방송$.$인터넷이 융합된 품질 보장형 광대역 멀티미디어 서비스를 언제 어디서나 끊임없이 안전하게 이용할 수 있는 차세대 통합네트워크를 말한다. 이를 위하여 BcN 전달망은 서비스 품질(QoS: Quality of Service) 보장, 고도의 통신망 관리 기능과 보안(Security) 기능, IPv6 주소체계의 수용을 통하여 다양한 서비스를 쉽게 창출할 수 있는 개방형 망구조(Open API)를 도입한 통신망으로 유선ㆍ무선ㆍ방송 등의 다양한 가입자망의 특성을 통합하여 수용해야 하며, 표준 인터페이스를 통해 다양한 응용서비스의 개발 및 이용 환경을 제공할 수 있어야 한다.(중략)

• Information and Communications Magazine
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• v.24 no.11
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• pp.51-57
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• 2007

본 고에서는 미 국방성(DoD: Department of Defense) 커뮤니티 지원 하에 국가안전보장국 (NSA: National Security Agency)에 의해 작성된 공개키 기반구조 및 키 관리 기반구조 보안토큰 보호프로파일에서의 평가대상(TOE: Target of Evaluation) 분석을 통해 보안토큰에서의 평가대상 (TOE)에 대한 응용과 보안환경에 대하여 분석한다.

• Information and Communications Magazine
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• v.34 no.5
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• pp.53-60
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• 2017

본고에서는 4차 산업혁명 도래에 따른 에너지 산업분야에서의 미래 트렌드 대응형 에너지 IDX 기술 개발 현황과 추후 방향성에 대해 기술하고자 한다. 이를 통해 에너지 신산업 창출에 있어서 ICBMS (IoT/Cloud/Big Data/Mobile/Security)와 인공지능, 그리고 블록체인 등의 기술의 내재화를 통한 새로운 에너지 기술의 방향에 대해 가늠해 보고자 한다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.24 no.4
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• pp.417-425
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• 2013

Digital communication technology have been focused on the higher data efficiency and the effective coding of information. Also, it is very important to improve security and minimize the interference of the external sources, Chaos communications system is studied to improve security and minimize the interference by effective encoding of information in the nonlinear systems such as DCSK(Differential Chaos Shift Keying) and CDSK(Correlation Delay Shift Keying). In this paper, we evaluate anti-jamming performance of chaos communications system using the DCSK and CDSK system. The simulation results show that the Gauss iterated map has better BER performance than the other maps(tent map, logistic map, Henon map). Also, DCSK and CDSK system can get the better anti-jamming performance by applying different chaotic maps.

• Journal of Digital Convergence
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• v.13 no.9
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• pp.269-276
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• 2015

Recently, with the activation of the industry related to the big data, the global security companies have expanded their scopes from structured to unstructured data for the intelligent security threat monitoring and prevention, and they show the trend to utilize the technique of user's tendency analysis for security prevention. This is because the information scope that can be deducted from the existing structured data(Quantify existing available data) analysis is limited. This study is to utilize the analysis of security tendency(Items classified purpose distinction, positive, negative judgment, key analysis of keyword relevance) applying the machine learning algorithm($Na{\ddot{i}}ve$ Bayes, Decision Tree, K-nearest neighbor, Apriori) in the big data environment. Upon the capability analysis, it was confirmed that the security items and specific indexes for the decision of security tendency could be extracted from structured and unstructured data.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.1C
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• pp.80-86
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• 2006

In this paper, we propose the PingPong-128(PP-128) keystream generator, based on summation generator. Proposed PingPong-128, a specific cipher of the PingPong Family, takes 128 bits key and 128 bit initial vector, has 258 bit internal state, and achieves a security level of 128 bits. The security analysis of PingPong-128 is presented, including the resistence to known attacks against the summation generator and other clock-controlled generators.

• Journal of the Optical Society of Korea
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• v.20 no.3
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• pp.335-342
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• 2016

We demonstrate an optical asynchronous transfer mode/wavelength division multiplexing (OATM/WDM) optical access network, using a router based on an optical header decoder to conduct next-generation communications. The router consists of a decoder or hardware analysis processing of the header bit and switches. The router in the OATM/WDM optical access network is a key technology by which to satisfy subscribers’ requests, including reliability, cost efficiency, high speed, large-capacity transmission, and elevated information security. In this study, we carry out experiments in which a header decoder delivers to 16 and 32 subscribers with a single wavelength in the router. These experiments confirm the decoder’s successful operation via hardware using 4 and 5 header bits. We propose that this system may significantly contribute toward the realization of an optical access network that provides high-quality service to subscribers of next-generation communications.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.40 no.10
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• pp.1958-1968
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• 2015

Things intelligence communication (M2M or IoT) service activation and global company of OneM2M-related business on aggressive investing and has led to the acceleration of change in the ICT market. But a variety of hacking security technology because of the possibility of secure communication (data exposure, theft, modification, deletion, etc.) has been issued as an important requirement. In this paper, we propose a mutual authentication protocol for secure communications chameleon hash based on the M2M environment. The results of performance analysis efficiency is encryption and decryption an average of 0.7%, calculated rate showed good results as compared to the target algorithm, equivalent to a 3%(Average 0.003 seconds) difference, mutual authentication and encryption region by using the key update advantage of ECC(Elliptic Curve Cryptography)based Chameleon hash function is signed of the operational efficiency, using a collision message verifiable properties demonstrated strong security of the communication section.