Yazar "0000-0002-8448-9987" için listeleme
-
Algebraic break of a cryptosystem based on discretized two-dimensional chaotic maps
Solak, Ercan; Çokal, Cahit (Elsevier Science BV, 2009-03-30)Recently, a cryptosystem based on two-dimensional discretized chaotic maps was proposed [T. Xiang, et al., Phys. Lett. A 364 (2007) 252]. In this Letter, we cryptanalyze the proposal using algebraic methods. We give three ... -
Algebraic break of image ciphers based on discretized chaotic map lattices
Solak, Ercan; Çokal, Cahit (Elsevier Science Inc, 2011-01-01)In this paper, we provide an algebraic cryptanalysis of a recently proposed chaotic image cipher. We show that the secret parameters of the algorithm can be revealed using chosen-plaintext attacks. Our attack uses the orbit ... -
Bilingual software requirements tracing using vector space model
Yıldız, Olcay Taner; Okutan, Ahmet; Solak, Ercan (SciTePress, 2014)In the software engineering world, creating and maintaining relationships between byproducts generated during the software lifecycle is crucial. A typical relation is the one that exists between an item in the requirements ... -
Breaking an orbit-based symmetric cryptosystem
Solak, Ercan; Rhouma, Rhouma; Belghith, Safya Mdimegh (Pergamon-Elsevier Science Ltd, 2011-09)We report a break for a recently proposed class of cryptosystems. The cryptosystem uses constant points of a periodic secret orbit to encrypt the plaintext. In order to break the system, it suffices to sort the constant ... -
Chunking in Turkish with conditional random fields
Yıldız, Olcay Taner; Solak, Ercan; Ehsani, Razieh; Görgün, Onur (Springer-Verlag, 2015-04-14)In this paper, we report our work on chunking in Turkish. We used the data that we generated by manually translating a subset of the Penn Treebank. We exploited the already available tags in the trees to automatically ... -
Comment on "Encryption and decryption of images with chaotic map lattices" [Chaos 16, 033118 (2006)]
Solak, Ercan; Çokal, Cahit (American Institute of Physics Inc., 2008-09)In this paper, we comment on the chaotic encryption algorithm proposed by A. N. Pisarchik et al. [Chaos 16, 033118 (2006)]. We demonstrate that the algorithm is not invertible. We suggest simple modifications that can ... -
Comment on "Modified Baptista type chaotic cryptosystem via matrix secret key" [Phys. Lett. A 372 (2008) 5427]
Rhouma, Rhouma; Solak, Ercan; Arroyo, David; Li, Shujun; Alvarez, Gonzalo; Belghith, Safya Mdimegh (Elsevier Science BV, 2009-09-07)In this comment, we analyze a recently proposed Baptista-like cryptosystem and show that it is not invertible. Others weaknesses are also reported. A modified version of this cryptosystem is proposed to show how to overcome ... -
Constructing a Turkish constituency parse treeBank
Yıldız, Olcay Taner; Solak, Ercan; Çandır, Şemsinur; Görgün, Onur; Ehsani, Razieh (Springer Verlag, 2016)In this paper, we describe our initial efforts for creating a Turkish constituency parse treebank by utilizing the English Penn Treebank. We employ a semiautomated approach for annotation. In our previouswork [18], the ... -
Constructing a Turkish-English parallel treebank
Yıldız, Olcay Taner; Solak, Ercan; Görgün, Onur; Ehsani, Razieh (Association for Computational Linguistics (ACL), 2014)In this paper, we report our preliminary efforts in building an English-Turkish parallel treebank corpus for statistical machine translation. In the corpus, we manually generated parallel trees for about 5,000 sentences ... -
Constructing a WordNet for Turkish using manual and automatic annotation
Ehsani, Razieh; Solak, Ercan; Yıldız, Olcay Taner (Assoc Computing Machinery, 2018-05)In this article, we summarize the methodology and the results of our 2-year-long efforts to construct a comprehensive WordNet for Turkish. In our approach, we mine a dictionary for synonym candidate pairs and manually mark ... -
Cryptanalysis of a chaos-based image encryption algorithm
Çokal, Cahit; Solak, Ercan (Elsevier Science BV, 2009-03-30)A chaos-based image encryption algorithm was proposed in [Z.-H. Guan, F. Huang, W. Guan, Phys. Lett. A 346 (2005) 153]. In this Letter, we analyze the security weaknesses of the proposal. By applying chosen-plaintext and ... -
Cryptanalysis of a cryptosystem based on discretized two-dimensional chaotic maps
Solak, Ercan; Çokal, Cahit (Elsevier Science BV, 2008-11-17)Recently, an encryption algorithm based on two-dimensional discretized chaotic maps was proposed [Xiang et al., Phys. Lett. A 364 (2007) 252]. In this Letter, we analyze the security weaknesses of the proposal. Using the ... -
Cryptanalysis of a multi-chaotic systems based image cryptosystem
Solak, Ercan; Rhouma, Rhouma; Belghith, Safya Mdimegh (Elsevier Science BV, 2010-01-15)This paper is a cryptanalysis of a recently proposed multi-chaotic systems based image cryptosystem. The cryptosystem is composed of two shuffling stages parameterized by chaotically generated sequences. We propose and ... -
Cryptanalysis of a new substitution-diffusion based image cipher
Rhouma, Rhouma; Solak, Ercan; Belghith, Safya Mdimegh (Elsevier Science BV, 2010-07)This paper introduces two different types of attacks on a recently proposed cryptosystem based on chaotic standard and logistic maps. In the two attacks, only a pair of (plaintext/ciphertext) was needed to totally break ... -
Cryptanalysis of Chaotic Ciphers
Solak, Ercan (Springer-Verlag Berlin, 2011)[No abstract available] -
Cryptanalysis of Fridrich's chaotic image encryption
Solak, Ercan; Çokal, Cahit; Yıldız, Olcay Taner; Bıyıkoğlu, Türker (World Scientific Publishing, 2010-05)We cryptanalyze Fridrich's chaotic image encryption algorithm. We show that the algebraic weaknesses of the algorithm make it vulnerable against chosen-ciphertext attacks. We propose an attack that reveals the secret ... -
Cryptanalysis of image encryption with compound chaotic sequence
Solak, Ercan (IEEE, 2009)Recently, an image encryption algorithm based on compound chaotic sequence was proposed [Tong et al., Image and Vision Computing 26 (2008) 843]. In this paper, we analyze the security weaknesses of the proposal. We give ... -
English-Turkish parallel treebank with morphological annotations and its use in tree-based SMT
Görgün, Onur; Yıldız, Olcay Taner; Solak, Ercan; Ehsani, Razieh (SciTePress, 2016)In this paper, we report our tree based statistical translation study from English to Turkish. We describe our data generation process and report the initial results of tree-based translation under a simple model. For ... -
An experimental evaluation of prior polarities in sentiment lexicons
Kanburoğlu, Ali Buğra; Solak, Ercan (IEEE, 2017)We present the results of an experiment to assess the validity of prior polarities available in sentiment lexicons. We designed a ranking task that was elicited through pairwise comparisons and compared the results to those ... -
A FST description of noun and verb morphology of Azarbaijani Turkish
Ehsani, Razieh; Özenç, Berke; Solak, Ercan (Association for Computational Linguistics (ACL), 2021)We give a FST description of nominal and finite verb morphology of Azarbaijani Turkish. We use a hybrid approach where nominal inflection is expressed as a slot-based paradigm and major parts of verb inflection are expressed ...