A New Cipher Based on Feistel Structure and Chaotic Maps
Chaotic systems have been proved to be useful and effective for cryptography. Through this work, a new Feistel cipher depend upon chaos systems and Feistel network structure with dynamic secret key size according to the message size have been proposed. Compared with the classical traditional ciphers...
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University of Baghdad, College of Science for Women
2019-03-01
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| Series: | مجلة بغداد للعلوم |
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| Online Access: | http://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/3244 |
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| author | Al-Bahrani et al. |
| author_facet | Al-Bahrani et al. |
| author_sort | Al-Bahrani et al. |
| collection | DOAJ |
| description | Chaotic systems have been proved to be useful and effective for cryptography. Through this work, a new Feistel cipher depend upon chaos systems and Feistel network structure with dynamic secret key size according to the message size have been proposed. Compared with the classical traditional ciphers like Feistel-based structure ciphers, Data Encryption Standards (DES), is the common example of Feistel-based ciphers, the process of confusion and diffusion, will contains the dynamical permutation choice boxes, dynamical substitution choice boxes, which will be generated once and hence, considered static,
While using chaotic maps, in the suggested system, called Chaotic-based Proposed Feistel Cipher System (CPFCS), we made the confusion and diffusion in dynamical behavior based on Standard and Lorenz maps. The first is used for substitution, and the second one for permutation operations .A proposed cryptographic system uses the same work (the same way) for both enciphering and deciphering. The proposed cipher operates on more than 500 bytes (4000-bit) readable text blocks by six round computing. Within the basic operator of the cipher, i.e., in the function of the round F, a dynamical lookup table 2D standard map system is used to enhance the complexity and diffusion of the unreadable text. Also, a 3D Logistic map used for key sequence generator and chaos based dynamical Initial Permutation (dynamical IP) are used to increase the diffusion and confusion. Three different image sizes and three different text length were implemented in CPFCS. The results of the proposed system and security tests improve the applicability of PFCS in the data protection and security. |
| format | Article |
| id | doaj-art-46e413fbba2b43a8964edba549177d47 |
| institution | Kabale University |
| issn | 2078-8665 2411-7986 |
| language | English |
| publishDate | 2019-03-01 |
| publisher | University of Baghdad, College of Science for Women |
| record_format | Article |
| series | مجلة بغداد للعلوم |
| spelling | doaj-art-46e413fbba2b43a8964edba549177d472025-08-20T03:56:13ZengUniversity of Baghdad, College of Science for Womenمجلة بغداد للعلوم2078-86652411-79862019-03-0116110.21123/bsj.16.1.(suppl.).0270A New Cipher Based on Feistel Structure and Chaotic MapsAl-Bahrani et al.Chaotic systems have been proved to be useful and effective for cryptography. Through this work, a new Feistel cipher depend upon chaos systems and Feistel network structure with dynamic secret key size according to the message size have been proposed. Compared with the classical traditional ciphers like Feistel-based structure ciphers, Data Encryption Standards (DES), is the common example of Feistel-based ciphers, the process of confusion and diffusion, will contains the dynamical permutation choice boxes, dynamical substitution choice boxes, which will be generated once and hence, considered static, While using chaotic maps, in the suggested system, called Chaotic-based Proposed Feistel Cipher System (CPFCS), we made the confusion and diffusion in dynamical behavior based on Standard and Lorenz maps. The first is used for substitution, and the second one for permutation operations .A proposed cryptographic system uses the same work (the same way) for both enciphering and deciphering. The proposed cipher operates on more than 500 bytes (4000-bit) readable text blocks by six round computing. Within the basic operator of the cipher, i.e., in the function of the round F, a dynamical lookup table 2D standard map system is used to enhance the complexity and diffusion of the unreadable text. Also, a 3D Logistic map used for key sequence generator and chaos based dynamical Initial Permutation (dynamical IP) are used to increase the diffusion and confusion. Three different image sizes and three different text length were implemented in CPFCS. The results of the proposed system and security tests improve the applicability of PFCS in the data protection and security.http://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/3244Block Cipher, Chaotic Maps, Feistel Cipher, Logistic map, Standard maps. |
| spellingShingle | Al-Bahrani et al. A New Cipher Based on Feistel Structure and Chaotic Maps مجلة بغداد للعلوم Block Cipher, Chaotic Maps, Feistel Cipher, Logistic map, Standard maps. |
| title | A New Cipher Based on Feistel Structure and Chaotic Maps |
| title_full | A New Cipher Based on Feistel Structure and Chaotic Maps |
| title_fullStr | A New Cipher Based on Feistel Structure and Chaotic Maps |
| title_full_unstemmed | A New Cipher Based on Feistel Structure and Chaotic Maps |
| title_short | A New Cipher Based on Feistel Structure and Chaotic Maps |
| title_sort | new cipher based on feistel structure and chaotic maps |
| topic | Block Cipher, Chaotic Maps, Feistel Cipher, Logistic map, Standard maps. |
| url | http://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/3244 |
| work_keys_str_mv | AT albahranietal anewcipherbasedonfeistelstructureandchaoticmaps AT albahranietal newcipherbasedonfeistelstructureandchaoticmaps |