• Proceedings of the IEEK Conference
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• 2000.06b
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• pp.169-172
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• 2000

This paper describes design of cryptographic processor which can execute SEED, DES, and triple DES encryption algorithm. To satisfy flexible architecture and area-efficient structure, the processor has I unrolled loop structure with hardware sharing and can support four standard mode, such as ECB, CBC, CFB, and OFB modes. To reduce overhead of key computation, the precomputation technique is used. Also to eliminate increase of processing time due to data input and output time, background I/O technique is used which data input and output operation execute in parallel with encryption operation of cryptographic processor. The cryptographic processor is designed using 2.5V 0.25 $\mu\textrm{m}$ CMOS technology and consists of about 34.8K gates. Its peak performances is about 250 Mbps under 100 Mhz ECB SEED mode and 125 Mbps under 100 Mhz triple DES mode.

• Proceedings of the Korea Contents Association Conference
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• 2003.11a
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• pp.113-119
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• 2003

Both the highly developed computing environment and the rapid increase of the internet users enable the present web based cluster system accounting service to help many users access to numerous data at high speed. However, the information security of users and data is also as important as the convenience of the systematic environment. Especially, the significance of damage to the individuals and organizations resulted from the data outflow, hacking and malicious coding has risen up to one of the most essential problems in the internet service business. In this study, I suggest a more safe web based cluster system accounting service solution applying SEED, the Korean Telecommunications Technology Association (TTA) standard encryption algorithm.

• Proceedings of the Korea Information Assurance Society Conference
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• 2004.05a
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• pp.59-64
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• 2004

In this paper a design and an implementation of a crypto chip which implements SEED and Triple-DES algorithms are described. We designed it by VHDL(VHSIC Hardware Description Language) which is a designed system-description language. To apply the chip to various application, four operating Modes such as ECB, CBC, CFB, and CFB are supported. The chip was designed by the Virtex-E XCV2000E BG560 of Xilinx and we confirmed result of it at the FPGA implementation by functional and timing simulation using the Xilinx Foundation Series 3.li.

• Journal of Institute of Control, Robotics and Systems
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• v.22 no.9
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• pp.766-772
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• 2016

Recent advances in networking and computers, especially internet of things (IoT) technologies, have improved the quality of home life and industrial sites. However, the security vulnerability of IoT technologies causes life-threatening issues and information leakage concerns. Studies regarding security algorithms are being conducted. In this paper, we proposed SEED algorithms based on one time passwords (OTPs). The specified server sent time data to the client every 10 seconds. The client changed the security key using time data and generated a ciphertext by combining the changed security key and the matrix. We applied the SEED algorithms with enhanced security to Linux-based embedded boards and android smart phones, then conducted a door lock control experiment (door lock & unlock). In this process, the power consumed for decryption was measured. The power consumption of the OTP-based algorithm was measured as 0.405-0.465W. The OTP-based algorithm didn't show any difference from the existing SEED algorithms, but showed a better performance than the existing algorithms.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2006.05a
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• pp.183-186
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• 2006

It is studied the implementation possibility of some encryption algorithms which meet the performance requirements in the smart card used in the TETRA system End-to-End Encryption. It is measured the operation time of the algorithm in the smart card which has 32 bit smart card controller made by Samsung Electronics. The algorithms used in the performance comparison are AES, ARIA, 3DES, SEED, IDEA which are the domestic or international standards. The input and output time of the smart card are measured using the smart card protocol analyzer. The pure algorithm operation time is calculated by the repeated algorithm operations. This measurement results can be used as the criteria for the selection of algorithm which will be used in the TETRA End-to-End encryption system. The algorithm which has better performance can be used for the implementation of additional functions in the smart lard, because of the enough time margin.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.28 no.10B
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• pp.916-926
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• 2003

The encryption of packets increases delay and delay jitter that may degrade the quality of service (QoS) in real-time communications. So, we analyzed the delay jitter, delay, and interval delay between consecutive packets which were encrypted by the DES, 3DES, SEED and AES algorithms in this study. The interval delay and jitter of three algorithms such as the DES, SEED, AES were similar to the results of no encryption. But in the case of 3DES, the encryption of packets increases the variance of interval delay and jitter in comparison with other algorithms. we also analyzed properties of security and an efficiency of RTP security between SRTP and H.235.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2003.07a
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• pp.208-211
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• 2003

최근 인터넷의 급속한 발달은 개인의 생활에 많은 변화를 주었다. 새로운 환경에서 개인의 전자거래는 시장의 요구사항과 산업적 경향에 따라서 변화와 발전을 거듭하게 되었고 그 결과 전자지갑, 전자화폐, 신용카드와 같은 안전한 전자지불시스템이 필연적으로 등장하게 되었다. 하지만 국내에 도입 또는 국내에서 개발된 많은 전자지불시스템이 국산 암호알고리즘을 사용하지 않는 것이 대부분이다. 따라서, 본 논문에서는 전자지 불프로토콜인 SET의 암호알고리즘 중 DES를 국내 암호알고리즘인 SEED로 대체 적용하여 실험실 모델을 설계·구현하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.04b
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• pp.939-942
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• 2002

중간 노드들에서 통신 데이터를 불법으로 획득하는 스니핑에 대한 대안으로 암호화 통신에 대한 요구가 증가하고 있다. 이를 위해 본 논문에서는 암호화 통신을 위해 블록 암호 알고리즘을 사용한 패킷 암/복호화 모듈을 제시하고, SEED 알고리즘을 이용하여 리눅스에 구현한 사례를 기술한다. 이 모듈은 기존의 네트워크와 응용 프로그램에 영향을 주지 않고 암호화 통신 기능을 제공하기 위해 IP 패킷의 헤더 정보를 변경하는 방법을 사용한다.

• The KIPS Transactions:PartC
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• v.8C no.5
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• pp.585-596
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• 2001

In this paper, a new stream cipher algorithm based on the chaos theory is proposed and is applied to a Web security system. The Web security system is composed of three parts： certificate authority (CA), Web client, and Web server. The Web client and server system include a secure proxy client (SPC) and a secure management server (SMS), respectively, for data encryption and decryption between them. The certificate is implemented based on X.509 and the RSA public key algorithm is utilized for key creation and distribution to certify both the client and server. Once a connection is established between the client and server, outgoing and incoming data are encrypted and decrypted, respectively, using one of the three cipher algorithms： chaos, SEED, and DES. The proposed chaos algorithm outperforms the other two conventional algorithms in processing time and complexity. Thus, the developed Web security system can be widely used in electronic commerce (EC) and Internet banking.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.10a
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• pp.171-174
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• 2010

본 논문에서는 렌즈의 흠집을 추출할 수 있는 퍼지 기법을 이용한 렌즈 흠집 검출 방법을 제안한다. 제안된 방법은 렌즈 영상을 그레이 영상으로 변환한 후, 캐니 마스크를 이용하여 렌즈의 경계선을 추출한다. 추출된 렌즈의 경계선에 대해 평균 이진화와 모폴로지를 이용하여 렌즈 경계선을 보정한다. 렌즈 경계선이 보정된 영상에서 Seed Fill 알고리즘을 적용하여 렌즈의 내부 영역만을 추출한다. 추출된 렌즈의 내부 영역에 해당하는 원 영상에서 소벨 마스크를 적용하여 렌즈 내부 영역의 에지를 추출한다. 렌즈 내부 영역에서 추출된 에지 객체들의 정보를 이용하여 흠집과 비흠집을 분류하는 퍼지 기법을 적용하여 흠집 영역을 추출한다. 본 논문에서 제안된 렌즈의 흠집 검출 방법의 성능을 평가하기 위해 CHEMI, MID, HL, HM 시력 보정용 렌즈를 대상으로 실험한 결과, 제안된 방법이 흠집을 효과적으로 검출하는 것을 확인하였다.