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All Journal Jurnal Teknoin Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Jurnal Ilmu Komputer dan Informasi
Iping Supriana Suwardi Iping Supriana Suwardi
School of Electrical Engineering and Informatics, ITB. Jl.Ganesha 10 Bandung, 40116, Indonesia
Computer Science & IT Engineering Library & Information Science Mechanical Engineering

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Journal : Jurnal Teknoin

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Kriteria Keamanan Blok Cipher dan Analisis Sandi Diferensial Yusuf Kurniawan; M. Sukrisno Mardiyanto; Iping Supriana Suwardi
Teknoin Vol. 10 No. 1 (2005)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/.v10i1.693

Abstract

Several criterions used to determine the security measure of ciphers, have been researched for tens years. Shannon recommended two concepts for designing of algorithm encryption: confusion and diffusion. These criterions have been expanded with other criterions addition like avalanche property, Strict Avalanche property, Key-dependence avalanche, sequence complexity, Binary derivatives, and Bit dependencies. This paper will try to discuss if the criterions that have been proposed by researchers have succeeded to counter to cryptanalysis. In this paper, six-round-DES is examined. The result of the research showed that the DES reduced to six rounds has satisfied the criterions, but failed to counter to differential cryptanalysis (DC). Some researchers have proposed to strengthen DES by making all subkeys Ki independent. So, for DES reduced to six rounds with independent subkeys, the number of keys is 6x48 (288 bits). However, DC can break the cipher by analyzing only 256 cipher texts.Keywords: Block cipher, differential cryptanalysis, DES, criterions, subkey.  
Co-Authors Dini Sofiani Permatasari Juwairiah Juwairiah M. Sukrisno Mardiyanto R. Purwoko Cahyo Nugroho Reza Adicipta Rinaldi Munir Tedjo Darmanto Tedjo Darmanto Yusuf Kurniawan