CHAOTIC CRYPTOGRAPHIC SCHEME BASED ON COMPOSITION MAPS
نویسندگان
چکیده
منابع مشابه
Chaotic Cryptographic Scheme Based on Composition Maps
In recent years, a growing number of cryptosystems based on chaos have been proposed. But most of them encountered more problems such as small key space and weak security. Based on such a fact, in the present report, a new kind of chaotic cryptosystem based on Composition of Trigonometric Chaotic Maps (CTCMs) is proposed. In the new scheme employs the composition map to shuffle the positions of...
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Recently, a chaotic cryptographic scheme based on composition maps was proposed. This paper studies the security of the scheme and reports the following findings: 1) the scheme can be broken by a differential attack with 6 + ⌈log L (MN)⌉ chosen-plaintext, where MN is the size of plaintext and L is the number of different elements in plain-text; 2) the scheme is not sensitive to the changes of p...
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a watermarking scheme for Grayscale image isproposed based on a family of the chaotic maps and discretecosine transform. Jacobian Elliptic mapis employed to encrypt ofwatermarked logo. Piecewise nonlinear chaotic map is also usedto determine the location of DCT coefficients for the watermarkembedding. The purpose of this algorithm is to improve theshortcoming of watermarking such as small key s...
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توابع درهم نقش بسیار مهم در سیستم های رمزنگاری و پروتکل های امنیتی دارند. در سیستم های رمزنگاری برای دستیابی به احراز درستی و اصالت داده دو روش مورد استفاده قرار می گیرند که عبارتند از توابع رمزنگاری کلیددار و توابع درهم ساز. توابع درهم ساز، توابعی هستند که هر متن با طول دلخواه را به دنباله ای با طول ثابت تبدیل می کنند. از جمله پرکاربردترین و معروف ترین توابع درهم می توان توابع درهم ساز md4, md...
watermarking scheme based on multiple chaotic maps
a watermarking scheme for grayscale image isproposed based on a family of the chaotic maps and discretecosine transform. jacobian elliptic mapis employed to encrypt ofwatermarked logo. piecewise nonlinear chaotic map is also usedto determine the location of dct coefficients for the watermarkembedding. the purpose of this algorithm is to improve theshortcoming of watermarking such as small key s...
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ژورنال
عنوان ژورنال: International Journal of Bifurcation and Chaos
سال: 2008
ISSN: 0218-1274,1793-6551
DOI: 10.1142/s0218127408020288