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Symmetric block ciphers with a block length of 32 bit

  • Subject of the thesis at hand is the analysis of symmetric block ciphers with a block length of 32 bit. It is meant to give a comprising overview over the topic of 32 bit block ciphers. The topic is divided in the examination of three questions. It contains a list of state of the art block ciphers with a block length of 32 bit. The block ciphers are being described, focussing on the encryption function. An SPN-based cipher with 32 bit block length is being proposed by rescaling the AES cipher. The 32 bit block length results in certain security issues. These so called risk factors are analysed and mitigating measures are proposed. The result of the thesis is, that 32 bit block ciphers can be implemented in a secure manner. The use of 32 bit ciphers should be limited to specific use-cases and with a profound risk analysis, to determine the protection class of the data to be encrypted.

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Author:Stephan Rothe
Advisor:Olaf Neiße
Document Type:Master's Thesis
Year of Completion:2018
Granting Institution:Hochschule Furtwangen
Date of final exam:2018/08/31
Release Date:2018/12/17
Tag:Analysis 32 bit block length; Block length 32 bit; Rescaling Rijndael/AES; State of the art 32 bit block ciphers; Symmetric block cipher
Page Number:53
Degree Program:SSM - Security & Safety Engineering
Open-Access-Status: Open Access 
Licence (German):License LogoUrheberrechtlich geschützt