Gradient Cryptanalysis of Block Cipher CHAM 64/128

Boris Ryabko, Alexander Soskov, Andrey Fionov

Результат исследования: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

We1 provide the results of cryptanalysis of the lightweight block cipher CHAM 64/128 carried out by means of a so-called gradient statistical attack. The experiments show that after 23 rounds the secret key can be determined with probability 0.01 under the length of the input sample 231 bytes and complexity 237 round function evaluations. Theoretical extrapolation of the suggested attack shows that the key can be completely determined with probability 0.01 after 57 rounds. The recommended number of rounds for CHAM 64/128 is 80. According to the cipher designers, the most successful attack has been a related-key boomerang attack which is effective on 56 rounds.

Язык оригиналаанглийский
Название основной публикации2019 16th International Symposium "Problems of Redundancy in Information and Control Systems", REDUNDANCY 2019
ИздательInstitute of Electrical and Electronics Engineers Inc.
Страницы211-215
Число страниц5
ISBN (электронное издание)9781728119441
DOI
СостояниеОпубликовано - окт 2019
Событие16th International Symposium "Problems of Redundancy in Information and Control Systems", REDUNDANCY 2019 - Moscow, Российская Федерация
Продолжительность: 21 окт 201925 окт 2019

Серия публикаций

Название2019 16th International Symposium "Problems of Redundancy in Information and Control Systems", REDUNDANCY 2019

Конференция

Конференция16th International Symposium "Problems of Redundancy in Information and Control Systems", REDUNDANCY 2019
СтранаРоссийская Федерация
ГородMoscow
Период21.10.201925.10.2019

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    Ryabko, B., Soskov, A., & Fionov, A. (2019). Gradient Cryptanalysis of Block Cipher CHAM 64/128. В 2019 16th International Symposium "Problems of Redundancy in Information and Control Systems", REDUNDANCY 2019 (стр. 211-215). [9003315] (2019 16th International Symposium "Problems of Redundancy in Information and Control Systems", REDUNDANCY 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/REDUNDANCY48165.2019.9003315