효율적 키 관리 및 길이를 위한 변형된 병렬 Feistel 구조의 DES 설계 = DES Design of Modified Feistel Structure for efficient Key Management and Key Length

다국어 초록 (Multilingual Abstract)

With the brilliant development of information communication and the rapid spread of internet, current network communication is carrying several up-to-date functions such as electronic commerce, activation of electro currency or electronic signature and will produce more advanced services in the future. Information communication network such as that electronic commerce would demand the more safe and transparent guard of network, and anticipate the more fast performance of network.
In this paper, In order to meet the several demands, DES(data encryption standard) with parallel feistel structure, which feistel structure of the basic structure of DES is transformed into in parallel, is proposed. The existing feistel structure can't use pipeline method for the structural problem of DES itself-the propagation of error. therefore, this modified parallel feistel structure could improve largely the performance of DES which had to have the trade-off relation between data processing speed and data security and in addition a method proposed in SEED having adopted the modified parallel feistel structure shows more excellent secure function and/or fast precessing ability. The used CAD Tool use Synopsys Ver.1999.10 in both of synthesis and simulation.