نتایج جستجو برای: rao nam cryptosystem
تعداد نتایج: 16923 فیلتر نتایج به سال:
Pisarchik et al. presented an image encryption algorithm based on chaotically coupled chaotic maps. But G. Arroyo et al. found some flaws and security weaknesses in the proposed cryptosystem. In this letter, the speed of this chaotic cryptosystem is analyzed and the encryption speed claimed by the authors is argued. The maximum possible speed for the proposed algorithm is calculated analyticall...
The RSA cryptosystem is supposed to be the first realization of a public key cryptosystem in 1977. Its (computational) security is relied upon the difficulty of factorization. In order to break the RSA cryptosystem it is enough to factorize where is the product of two large prime numbers, . This is equivalent to calculate where is the Euler function. In this paper Neural Networks are trained in...
In this paper, we construct a new threshold cryptosystem from the Gap Diffie-Hellman (GDH) group. The proposed scheme enjoys all the most important properties that a robust and practical threshold cryptosystem should possess, that is, it is noninteractive, computationally efficient and provably secure against adaptive chosen ciphertext attacks. In addition, thanks to the elegant structure of th...
Exposures to sodium metam (NaM) within the developmental period of somitogenesis (10- to 18-h postfertilization [hpf]) results in easily detectable distortions of the notochord by 24 hpf in the developing zebrafish. We hypothesized that NaM-induced transcriptional changes during somitogenesis would reveal the major molecular targets in the zebrafish embryo. Embryos were exposed to NaM beginning...
A few breeding companies dominate the maize (Zea mays L.) hybrid market in Brazil: Monsanto® (35%), DuPont Pioneer® (30%), Dow Agrosciences® (15%), Syngenta® (10%) and Helix Sementes (4%). Therefore, it is important to monitor the genetic diversity in commercial germplasms as breeding practices, registration and marketing of new cultivars can lead to a significant reduction of the genetic diver...
This paper proposes a syntax-semantics correspondence of locative expressions: This proposal is based on the syntactic hierarchy among three locative structures (PPs, VPs, and verbal affixes) and the semantic hierarchy among four locative arguments (Goal, Source, Symmetric Path, Stative Location). As for the syntactic hierarchy, the verbal affixes are closer to the head verb than the locative/p...
In this paper, we propose a new finger multi-biometric cryptosystem using feature-level fusion to simultaneously protect multiple templates of fingerprint, finger vein, finger knuckle print and finger shape traits as a single secure sketch. We theoretically analyze the featurelevel fusion for finger multi-biometric cryptosystem with respect to their impact on security and recognition accuracy. ...
The main contribution of this thesis is a simplification, a generalization and some modifications of the homomorphic cryptosystem proposed by Paillier in 1999, and several cryptological protocols that follow from these changes. The Paillier cryptosystem is an additive homomorphic cryptosystem, meaning that one can combine ciphertexts into a new ciphertext that is the encryption of the sum of th...
Background-—We previously reported that serum N-methylnicotinamide (me-Nam), an indicator of nicotinamide N-methyltransferase activity, is associated with obesity and diabetes mellitus in Chinese patients. However, whether nicotinamide N-methyltransferase plays a role in human coronary artery disease (CAD) remains to be elucidated. We aim to investigate the associations of serum me-Nam with CAD...
تصاویر دیجیتال به دلیل کاربردهای فراوانی که دارند از اهمیت خاصی برخوردارند. اما مشکلی که در این زمینه وجود دارد این است که این تصاویر ممکن است تحت تاثیر عوامل گوناگونی در معرض نویز قرار گرفته و یا به عبارت دیگر تخریب شوند. از آنجایی که این تخریب کارایی دیگر حوزه های کار با تصویر از جمله بخش بندی تصاویر، بازشناسی الگو و دیگر پردازش های تصویر را مختل می کند، فیلترهای بسیاری به منظور بهبود تصاویر ...
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