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Serangan diferensial 4 round pada algoritme Loong-64: a family of involutional lightweight block cipher based on SPN structure

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Algoritme Loong-64 merupakan algoritme lightweight block cipher dengan struktur Substitution Permutation Network (SPN) yang memiliki blok plaintext sebesar 64-bit dengan blok kunci sebesar 64-bit dan terdiri dari 16 round. Liu et al. menyatakan bahwa algoritme Loong-64 diklaim tahan terhadap serangan diferensial dan memiliki jumlah S-box aktif paling sedikit pada 4 round yaitu sebesar 32 S-box aktif. Akan tetapi, tidak terdapat penjelasan dan data yang mendukung pernyataan dalam penelitian Liut et al. Oleh karena itu, dalam penelitian Tugas Akhir ini dilakukan serangan diferensial 4 round pada algoritme Loong: A Family of Involutional Lightweight Block Cipher Based on SPN Structure. Metode yang digunakan untuk mencari karakteristik diferensial 4 round yaitu mencari jumlah S-box aktif paling sedikit pada 4 round algoritme Loong-64 dan mencari nilai difference dari komponen SubCells yang memiliki probabilitas tertinggi. Hasil penelitian menunjukkan bahwa jumlah S-box aktif paling sedikit pada 4 round algoritme Loong-64 yaitu 32 S-box aktif, dan probabilitas karakteristik diferensial terbaik pada 4 round algoritme Loong-64 sebesar 2?64 dengan kompleksitas serangan diferensial sebesar 264. Penelitian ini membuktikan klaim Liu et al. bahwa jumlah S-box aktif paling sedikit yaitu 32 S-box dan algoritme Loong-64 tahan terhadap serangan diferensial. --

Loong-64 is a lightweight block cipher algorithm based on a Substitution Permutation Network (SPN) structure that has 64-bit plaintext blocks and key blocks with a corresponding round number of 16. Liu et al. claimed this algorithm to be able to resist differential attacks and has at least 32 active S-boxes on 4 rounds. However, the statement is not supported with adequate explanations and data. Consequently, in this research, a 4-round differential attack was carried out on the Loong algorithm: A Family of Involutional Lightweight Block Cipher Based on SPN Structure. The method used to find the 4-round differential characteristics is to find the least number of active s-boxes in 4 rounds of the Loong-64 algorithm and look for the difference value of the SubCells component that has a high probability. The results showed that the claims of Liu et al. it is true that the number of active s-boxes is at least 32 active S-boxes on 4 rounds of the Loong-64 algorithm and the probability of the best differential characteristics in 4 rounds of the Loong-64 algorithm is 2?64 with a differential attack complexity of 264.

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Call Number

2022 MET s

Publisher

Bogor : Poltek SSN., 2022

Collation

121 hlm.

Language

Indonesia

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Subject(s)

Serangan Diferensial(1)
Karakteristik Diferensial (2)
Loong-64(3)
Probabilitas(4)
Kompleksitas Serangan(5)

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