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Published in:
2017 | OriginalPaper | Chapter
Security Assessment of Cryptographic Algorithms
Authors : Marcin Niemiec, Maciej Francikiewicz
Published in: Computer Network Security
Publisher: Springer International Publishing
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Abstract
This article presents a way to assess security of block cryptographic algorithms in universal manner. We presented implementation of test methods that analyse input and corresponding output of a cryptography algorithm and assign a metric for evaluation how strong is the encryption scheme. The methods – inspired by NIST test suit – are based on specified threshold for accepting the test result (P-value). The methods were validated in practise using several experiments. We checked behaviours of secure and unsecure cryptographic algorithms: AES, DES and Ceasar cipher, as well as idealized encryption scheme as a reference. The methods were packed in a framework that can be used as a cryptographic assessment tool for cryptographers, requiring only a slight knowledge of programming language from them. As experiments has shown, test suit proposed in this paper can be used to check whether encryption scheme has some properties or features which are expected from a good cryptographic algorithm.