• Journal of the Korea Institute of Information Security & Cryptology
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• v.11 no.1
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• pp.13-23
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• 2001

This paper implemented into hardware SEED which is the KOREA standard 128-bit block cipher. First, at the respect of hardware implementation, we compared and analyzed SEED with AES finalist algorithms - MARS, RC6, RIJNDAEL, SERPENT, TWOFISH, which are secret key block encryption algorithms. The encryption of SEED is faster than MARS, RC6, TWOFISH, but is as five times slow as RIJNDAEL which is the fastest. We propose a SEED hardware architecture which improves the encryption speed. We divided one round into three parts, J1 function block, J2 function block J3 function block including key mixing block, because SEED repeatedly executes the same operation 16 times, then we pipelined one round into three parts, J1 function block, J2 function block, J3 function block including key mixing block, because SEED repeatedly executes the same operation 16 times, then we pipelined it to make it more faster. G-function is implemented more easily by xoring four extended 4 byte SS-boxes. We tested it using ALTERA FPGA with Verilog HDL. If the design is synthesized with 0.5 um Samsung standard cell library, encryption of ECB and decryption of ECB, CBC, CFB, which can be pipelined would take 50 clock cycles to encrypt 384-bit plaintext, and hence we have 745.6 Mbps assuming 97.1 MHz clock frequency. Encryption of CBC, OFB, CFB and decryption of OFB, which cannot be pipelined have 258.9 Mbps under same condition.

• Review of KIISC
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• v.12 no.3
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• pp.77-86
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• 2002

본고에서는 현재 추진중이거나 추진된 표준 암호알고리즘 공모사업에 대한 추진체계 및 현황을 파악한다. 또한 등록방식에서 공모방식으로 전환된 ISO/IEC 국제표준 선정방식의 전환 배경을 살펴보고, 현재 ISO/IEC 국제표준 후보로 제안되어 심의 중에 있는 블록암호 알고리즘 SEED의 표준화 현황을 파악한다.

• TTA Journal
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• s.65
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• pp.41-49
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• 1999

• TTA Journal
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• s.92
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• pp.46-50
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• 2004

• TTA Journal
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• s.67
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• pp.122-124
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• 2000

• Journal of the Korea Institute of Information Security & Cryptology
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• v.24 no.6
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• pp.1117-1127
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• 2014

Differential Fault Analysis(DFA) is widely known for one of the most powerful method for analyzing block cipher. it is applicable to block cipher such as DES, AES, ARIA, SEED, and lightweight block cipher such as PRESENT, HIGHT. In this paper, we introduce a differential fault analysis on the lightweight block cipher LEA for the first time. we use 300 chosen fault injection ciphertexts to recover 128-bit master key. As a result of our attack, we found a full master key within an average of 40 minutes on a standard PC environment.

• 전자공학회논문지 IE
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• v.43 no.2
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• pp.16-21
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• 2006

In this paper we proposed of the SEED cipher algorithm which improved cipher intensity. The proposed algorithm has input data of 192bit and key input data of 256bit and it performs 16 Rounds for improvement of cipher intensity. We simulated the algorithm employing C compiler and the Foundation Express Tool so that verified performance of it.

• Annual Conference of KIPS
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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.

• Annual Conference of KIPS
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• 2009.04a
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• pp.1474-1477
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• 2009

본 논문에서는 ASR(Arithmetic Shift Register)과 SHA-2로 구성된 32비트 출력의 새로운 스트림 암호 ASC를 제안한다. ASC는 소프트웨어 및 하드웨어 구현이 쉽게 디자인된 스트림 암호 알고리즘이다. 특히 계산능력이 제한된 무선 통신장비에서 빠르게 수행할 수 있도록 개발되었다. ASC는 다양한 길이(8-32바이트)의 키를 지원하고 있으며, 워드 단위로 연산을 수행한다. ASC는 매우 간결한 구조를 가지고 있으며 선형 궤환 순서기(Linear Feedback Sequencer)로 ASR을 적용하였고, 비선형 순서기(Nonlinear sequencer)로 SHA-2를 적용하여 크게 두 부분으로 구성되어 있는 결합 함수(combining function) 스트림 암호이다. 그리고 8비트, 16비트, 32비트 프로세스에서 쉽게 구현이 가능하다. 제안한 스트림 암호 ASC는 최근에 표준 블록 암호로 제정된 AES, ARIA, SEED등의 블록 암호보다는 6-13배 빠른 결과를 보여주고 있으며, 안전성 또한 현대 암호 알고리즘이 필요로 하는 안전성을 만족하고 있다.

• Journal of the Korea Society of Computer and Information
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• v.15 no.2
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• pp.199-206
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• 2010

Society of digital information becomes gradually advancement, and it is a situation offered various service, but it is exposed to a serious security threat by a fast development of communication such as the internet and a network. There is required a research of technical encryption to protect more safely important information. And we require research for application of security technology in environment or a field to be based on a characteristics of market of an information security. The symmetric key cipher algorithm has same encryption key and decryption key. It is categorized to Block and Stream cipher algorithm according to conversion ways. This study inspects safety and reliability of proposed SEED, Stream cipher algorithm. And it confirms possibility of application on the communication environments. This can contribute to transact information safely by application of suitable cipher algorithm along various communication environmental conditions.