Cihangir Tezcan

E-mail
cihangir@metu.edu.tr
Department
Graduate School of Informatics
Scopus Author ID
Web of Science Researcher ID
Key lengths revisited: GPU-based brute force cryptanalysis of DES, 3DES, and PRESENT
Tezcan, Cihangir (2022-03-01)
Lightweight cryptographic algorithms that are tailored for resource-constrained devices sometimes use short keys which might be susceptible to brute force attacks. Such attacks using CPU or GPU might be costly because some...
GPU accelerated 3DES encryption
Altınok, Kaan Furkan; Peker, Afşin; Tezcan, Cihangir; Temizel, Alptekin (2021-07-01)
Triple DES (3DES) is a NIST and ISO/IEC standard block cipher that is also used in some web browsers and several electronic payment applications. We propose an optimized bit-level parallelization of 3DES for GPU accelerate...
Anomaly-Based Intrusion Detection by Machine Learning: A Case Study on Probing Attacks to an Institutional Network
Tufan, Emrah; Tezcan, Cihangir; Acartürk, Cengiz (2021-01-01)
Cyber attacks constitute a significant threat to organizations with implications ranging from economic, reputational, and legal consequences. As cybercriminals' techniques get sophisticated, information security profession...
Weak-Key Distinguishers for AES
Grassi, Lorenzo; Leander, Gregor; Rechberger, Christian; Tezcan, Cihangir; Wiemer, Friedrich (2021-01-01)
In this paper, we analyze the security of AES in the case in which the whitening key is a weak key.
Weak-Key Distinguishers for AES
Grassi, Lorenzo; Rechberger, Christian; Leander, Gregor; Tezcan, Cihangir; Wiemer, Friedrich (Springer, Cham, 2021-01-01)
In this paper, we analyze the security of AES in the case in which the whitening key is a weak key.After a systematization of the classes of weak-keys of AES, we perform an extensive analysis of weak-key distinguishers (in...
Optimization of Advanced Encryption Standard on Graphics Processing Units
Tezcan, Cihangir (2021-01-01)
Graphics processing units (GPUs) are specially designed for parallel applications and perform parallel operations much faster than central processing units (CPUs). In this work, we focus on the performance of the Advanced ...
Analysis of Ascon, DryGASCON, and Shamash Permutations
Tezcan, Cihangir (2020-09-01)
On the Fly Encryption via GPU
Tezcan, Cihangir (2019-11-21)
Hafif Blok Şifrelerin Ekran Kartları ile Kriptanalizi
Tezcan, Cihangir (2018-06-27)
Searching for subspace trails and truncated differentials
Leander, Gregor; Tezcan, Cihangir; Wiemer, Friedrich (2018-01-01)
Grassi et al. [Gra+16] introduced subspace trail cryptanalysis as a generalization of invariant subspaces and used it to give the first five round distinguisher for Aes. While it is a generic method, up to now it was only ...
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