scholarly journals A Chaotic-Based Encryption/Decryption Framework for Secure Multimedia Communications

Entropy ◽  
2020 ◽  
Vol 22 (11) ◽  
pp. 1253
Author(s):  
Ibrahim Yasser ◽  
Mohamed A. Mohamed ◽  
Ahmed S. Samra ◽  
Fahmi Khalifa
Keyword(s):  
Dominant Role ◽  
Data Encryption ◽  
Comparative Performance ◽  
Secure Data Transmission ◽  
Encryption Schemes ◽  
Media Types ◽  
Encryption Decryption ◽  
Residual Intelligibility ◽  
Performance Results ◽  
And Diffusion

Chaos-based encryption has shown an increasingly important and dominant role in modern multimedia cryptography compared with traditional algorithms. This work proposes novel chaotic-based multimedia encryption schemes utilizing 2D alteration models for high secure data transmission. A novel perturbation-based data encryption for both confusion and diffusion rounds is proposed. Our chaotification structure is hybrid, in which multiple maps are combined combines for media encryption. Blended chaotic maps are used to generate the control parameters for the permutation (shuffling) and diffusion (substitution) structures. The proposed schemes not only maintain great encryption quality reproduced by chaotic, but also possess other advantages, including key sensitivity and low residual clarity. Extensive security and differential analyses documented that the proposed schemes are efficient for secure multimedia transmission as well as the encrypted media possesses resistance to attacks. Additionally, statistical evaluations using well-known metrics for specific media types, show that proposed encryption schemes can acquire low residual intelligibility with excessive nice recovered statistics. Finally, the advantages of the proposed schemes have been highlighted by comparing it against different state-of-the-art algorithms from literature. The comparative performance results documented that our schemes are extra efficacious than their data-specific counterpart methods.

scholarly journals Enkripsi Database Sekolah SMK Pembangunan Dengan Algoritma IDEA

2021 ◽  
Vol 4 (1) ◽  
pp. 50-56
Author(s):  
Devlin Iskandar Saragih ◽  
Paska Marto Hasugian
Keyword(s):  
Open Data ◽  
Data Encryption ◽  
Measurement Systems ◽  
Secure Data Transmission ◽  
International Data ◽  
Cryptographic Key ◽  
Distributed Measurement Systems ◽  
Encryption Decryption ◽  
Distributed Measurement ◽  
Key Length

One of the algorithms in cryptography that can be used for school database security is the IDEA (International Data Encryption Algorithm) algorithm. The IDEA algorithm is one of the cryptographic algorithms that has various applications in secure data transmission in the scope of networks and distributed measurement systems. Encryption results appear in the form of a notepad. The Open data button is used to find data that will be used for the encryption process. The key checklist is used to input the key length that will be used for the encryption decryption security process. The system displays the IDEA Cryptographic key, can use the IDEA Cryptographic key, the encryption and decryption change process is clearly visible. Encryption is done on the SMK Pembangunan school database with IDEA algorithm and designing the student database encryption application based on the name of the SMK Pembangunan using Visual Basic programming language.

scholarly journals A New Image Encryption Scheme Based on Hybrid Chaotic Maps

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-23 ◽  
Author(s):  
Ibrahim Yasser ◽  
Fahmi Khalifa ◽  
Mohamed A. Mohamed ◽  
Ahmed S. Samrah
Keyword(s):  
Image Encryption ◽  
Chaotic Maps ◽  
High Sensitivity ◽  
Data Encryption ◽  
Discrete Wavelet ◽  
Hybrid Technique ◽  
High Security ◽  
Residual Intelligibility ◽  
And Diffusion ◽  
Image Encryption Algorithm

Chaos-based encryption algorithms offer many advantages over conventional cryptographic algorithms, such as speed, high security, affordable overheads for computation, and procedure power. In this paper, we propose a novel perturbation algorithm for data encryption based on double chaotic systems. A new image encryption algorithm based on the proposed chaotic maps is introduced. The proposed chaotification method is a hybrid technique that parallels and combines the chaotic maps. It is based on combination between Discrete Wavelet Transform (DWT) to decompose the original image into sub-bands and both permutation and diffusion properties are attained using the chaotic states and parameters of the proposed maps, which are then concerned in shuffling of pixel and operations of substitution, respectively. Security, statistical test analyses, and comparison with other techniques indicate that the proposed algorithm has promising effect and it can resist several common attacks. Namely, the average values for UACI and NPCR metrics were 33.6248% and 99.6472%, respectively. Additionally, unscrambling quality can fulfill security and execution prerequisites as evidenced by PSNR (9.005955) and entropy (7.999275) values. In sum, the proposed method has enough ability to achieve low residual intelligibility with high quality recovered data, high sensitivity, and high security performance compared to some other recent literature approaches.

scholarly journals Data ecryption based on multi-order FrFT, and FPGA implementation of DES algorith

2020 ◽  
Vol 9 (2) ◽  
pp. 141
Author(s):  
A. Rabie ◽  
Kh. El Shafie ◽  
A. Hammuoda ◽  
M. Rohiem
Keyword(s):  
Fourier Transform ◽  
Fractional Fourier Transform ◽  
Data Encryption ◽  
Multimedia Data ◽  
Encrypted Data ◽  
Textual Data ◽  
Encryption And Decryption ◽  
Encryption Schemes ◽  
Symmetric Key ◽  
Encryption Decryption

<span>Cryptography techniques need some algorithms for encryption of data. Most of available encryption techniques are used for textual data; a few of encryption methods are used for multimedia data; However, This Algorithms that are used for textual data may not be inefficient for multimedia, because it is size is greater than the text. Therefore, Cryptosystems need to find and develop a new encryption schemes for such data. The most popular symmetric key algorithms are Data Encryption Standard (DES). However, DES is may be not suitable for multimedia because it consumes times. Encryption and decryption of these data require different methods. In this paper a method for encryption/decryption data by using the nature of FrFT in signals analysis, based on multi-order Fractional Fourier Transform has been introduced. The security of the method used in the encryption work was taken into account to identify the different indicators to measure the security of the encryption Techniques. These indicators are: sensitivity proposed Techniques for the key, the complexity of the processes, and statistical analysis. The key is formed by combination of order of Fractional Fourier Transform. The encrypted data is obtained by the summation of different orders. Numerical simulation results are given to demonstrate this proposed method.</span>

Post PhD Adjustments and Internationalization of Higher Education in China - A Study based on International PhD Students in China

2016 ◽  
Vol 7 (4) ◽  
pp. 37-47
Author(s):  
Ghulam Nabi ◽  
Song Wei ◽  
Ghulam Ghous ◽  
Nadia Sheikh
Keyword(s):  
Dominant Role ◽  
Future Research ◽  
Comparative Performance ◽  
Employment Adjustment ◽  
Informal Interview ◽  
Phd Education ◽  
Higher Education In China ◽  
Adjustment Issues ◽  
Education In China ◽  
Selection Of

PhD education plays dominant role in the field of innovation, science, technology and economic development. This is being sponsored by some key scholarship agencies in the world among which Chinese Scholarship Council has emerged one among biggest. This research has been intended to understand the process of selection of PhD awardees and employment adjustment in their home country. An informal interview followed by a 5 point likert scale questionnaire were used to collected data from 200 PhD scholarship awardees in China and indigenous PhDs in Pakistan. This study has identified two main findings, one is the awareness issue about the scholarships availability is a serious issue and the other one is eligibility issue based on the number of schooling years required for PhD admission that may pose serious post PhD adjustment issues. While as a strong coordination gap does exist between Chinese scholarship agencies with other countries. A future research is being suggested to analyze comparative performance between Chinese and non-Chinese Ph.Ds.

scholarly journals A Security Enhanced Encryption Scheme and Evaluation of Its Cryptographic Security

Entropy ◽  
2019 ◽  
Vol 21 (7) ◽  
pp. 701
Author(s):  
Miodrag J. Mihaljević
Keyword(s):  
Error Correction ◽  
Channel Capacity ◽  
Security Level ◽  
Encryption Scheme ◽  
Secret Key ◽  
Error Correction Coding ◽  
Security Enhancement ◽  
Encryption Schemes ◽  
Cryptographic Security ◽  
Encryption Decryption

An approach for security enhancement of a class of encryption schemes is pointed out and its security is analyzed. The approach is based on certain results of coding and information theory regarding communication channels with erasures and deletion errors. In the security enhanced encryption scheme, the wiretapper faces a problem of cryptanalysis after a communication channel with bits deletion and a legitimate party faces a problem of decryption after a channel with bit erasures. This paper proposes the encryption-decryption paradigm for the security enhancement of lightweight block ciphers based on dedicated error-correction coding and a simulator of the deletion channel controlled by the secret key. The security enhancement is analyzed in terms of the related probabilities, equivocation, mutual information and channel capacity. The cryptographic evaluation of the enhanced encryption includes employment of certain recent results regarding the upper-bounds on the capacity of channels with deletion errors. It is shown that the probability of correct classification which determines the cryptographic security depends on the deletion channel capacity, i.e., the equivocation after this channel, and number of codewords in employed error-correction coding scheme. Consequently, assuming that the basic encryption scheme has certain security level, it is shown that the security enhancement factor is a function of the deletion rate and dimension of the vectors subject to error-correction encoding, i.e., dimension of the encryption block.

New barbituric acid derivatives for data encryption and decryption based on the mechanochromic fluorescence effect

The Analyst ◽  
2020 ◽  
Vol 145 (15) ◽  
pp. 5325-5332
Author(s):  
Hanjun Zhang ◽  
Zhen Xu ◽  
Furong Tao ◽  
Yan Li ◽  
Yuezhi Cui ◽  
...  
Keyword(s):  
Optical Properties ◽  
Barbituric Acid ◽  
Data Encryption ◽  
Fluorescence Properties ◽  
Encryption And Decryption ◽  
Encryption Decryption ◽  
Barbituric Acid Derivatives ◽  
Fluorescence Effect

CB-Ph and CB-Me have similar color and fluorescence properties, while they exhibit specific differences under the same stimulus. Based on the unique optical properties of CB-Ph and CB-Me, a new data encryption–decryption technology is developed.

NON-BREAKABLE DATA ENCRYPTION WITH CLASSICAL INFORMATION

2004 ◽  
Vol 04 (02) ◽  
pp. C1-C5 ◽  
Author(s):  
LASZLO B. KISH ◽  
SWAMINATHAN SETHURAMAN
Keyword(s):  
Homeland Security ◽  
Data Transmission ◽  
Data Security ◽  
Data Encryption ◽  
Digital Information ◽  
Classical Information ◽  
Security Applications ◽  
Secure Data Transmission ◽  
Factorization Algorithms ◽  
Quantum Encryption

Secure encryption of data is one of the most important parts of information technology and major concern of data security, military, defense and homeland security applications. The main aim of the paper is to propose a new way of approach to encryption. We propose a new possible approach [1] to encryption, which could be a fast, simple, inexpensive, robust, flexible, and mobile way of data encryption for absolutely secure data transmission by using classical digital information. The Eavesdropper is allowed to know the received signal thus the method has a higher level of protection than that of quantum encryption. Factorization algorithms do not help to break the code. Proper scrambling operators, which are necessary for the method, are study of current research.

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