Next Article in Journal
Hardware Performance Evaluation of Authenticated Encryption SAEAES with Threshold Implementation
Previous Article in Journal
Implementation of a New Strongly-Asymmetric Algorithm and Its Optimization
Open AccessArticle

Security Analysis of Lightweight IoT Cipher: Chaskey

Department of Applied Mathematics and Computer Science, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
Cryptography 2020, 4(3), 22; https://doi.org/10.3390/cryptography4030022
Received: 3 July 2020 / Revised: 24 July 2020 / Accepted: 1 August 2020 / Published: 5 August 2020
This paper presents the differential cryptanalysis of ARX based cipher Chaskey using tree search based heuristic approach. ARX algorithms are suitable for resource-constrained devices such as IoT and very resistant to standard cryptanalysis such as linear or differential. To make a differential attack, it is important to make differential characteristics of the cipher. Finding differential characteristics in ARX is the most challenging task nowadays. Due to the bigger block size, it is infeasible to calculate lookup tables for non-linear components. Transition through the non-linear layer of cipher faces a huge state space problem. The problem of huge state space is a serious research topic in artificial intelligence (AI). The proposed heuristic tool use such methods inspired by Nested Tree-based sampling to find differential paths in ARX cipher and successfully applied to get a state of art results for differential cryptanalysis with a very fast and simpler framework. The algorithm can also be applied in different research areas in cryptanalysis where such huge state space is a problem. View Full-Text
Keywords: heuristic techniques; differential attacks; Chaskey cipher; ARX lightweight ciphers; nested tree search; single player games heuristic techniques; differential attacks; Chaskey cipher; ARX lightweight ciphers; nested tree search; single player games
Show Figures

Figure 1

MDPI and ACS Style

Dwivedi, A.D. Security Analysis of Lightweight IoT Cipher: Chaskey. Cryptography 2020, 4, 22.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop