Kriteria Keamanan Blok Cipher dan Analisis Sandi Diferensial
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.
Penulis: Yusuf Kurniawan, M.
Sukrisno Mardiyanto, Iping Supriana Suwardi
Kode Jurnal: jptindustridd050026
