Cryptanalysis of reduced QTL block cipher

Autor: Nasour Bagheri, Sadegh Sadeghi, Mohamed Ahmed Abdelraheem

Publikováno v: Microprocessors and Microsystems. 52:34-48

Recently, a new ultra lightweight block cipher called QTL has been proposed. The authors claim to achieve a fast diffusion in QTL by using a new variant of a generalized Feistel network structure that changes all block messages in one iterative round

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ca4184997f1f7504920930ff67224413
https://doi.org/10.1016/j.micpro.2017.05.007

PaaSword: A Data Privacy and Context-aware Security Framework for Developing Secure Cloud Applications - Technical and Scientific Contributions

Autor: Mohamed Ahmed Abdelraheem, Spyros Mantzouratos, Jeremias Mechler, Sebastian Thomas Schork, Efi Papatheocharous, Thomas Carnehult, Kateryna Yurchenko, Gunther Schiefer, Panagiotis Gouvas, George Moldovan, Matthias Gabel

Most industries worldwide have entered a period of reaping the benefits and opportunities cloud offers. At the same time, many efforts are made to address engineering challenges for the secure development of cloud systems and software.With the majori

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18752393e04e7cac5b47cbecb3c21e05
https://publikationen.bibliothek.kit.edu/1000105415

Executing Boolean Queries on an Encrypted Bitmap Index

Autor: Christian Nordahl, Christian Gehrmann, Mohamed Ahmed Abdelraheem, Malin Lindström

Publikováno v: CCSW
Proceedings of the 2016 ACM on Cloud Computing Security Workshop
Proceedings of the 2016 ACM on Cloud Computing Security Workshop-CCSW 16
Proceedings of the 2016 ACM on Cloud Computing Security Workshop-CCSW '16

We propose a simple and efficient searchable symmetric encryption scheme based on a Bitmap index that evaluates Boolean queries. Our scheme provides a practical solution in settings where communications and computations are very constrained as it off

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::775ee0657f247f28a920f7ead9ac10f7
https://doi.org/10.1145/2996429.2996436

Improved Linear Cryptanalysis of reduced-round SIMON-32 and SIMON-48

Autor: Nasour Bagheri, Mohammad Reza Aref, Praveen Gauravaram, Hoda AlKhzaimi, Javad Alizadeh, Mohamed Ahmed Abdelraheem

Publikováno v: Progress in Cryptology--INDOCRYPT 2015 ISBN: 9783319266169
INDOCRYPT

In this paper we analyse two variants of SIMON family of light-weight block ciphers against variants of linear cryptanalysis and present the best linear cryptanalytic results on these variants of reduced-round SIMON to date. We propose a time-memory

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0db94a05e290ec6e10215798d659b799
http://soda.swedishict.se/6125/

Estimating the Probabilities of Low-Weight Differential and Linear Approximations on PRESENT-Like Ciphers

Autor: Mohamed Ahmed Abdelraheem

Publikováno v: Lecture Notes in Computer Science ISBN: 9783642376818
ICISC

We use large but sparse correlation and transition-difference-probability submatrices to find the best linear and differential approximations respectively on PRESENT-like ciphers. This outperforms the branch and bound algorithm when the number of low

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ad116b65b597f0cc59551704a934df6a
https://doi.org/10.1007/978-3-642-37682-5_26