40-bit encryption

About: 40-bit encryption is a research topic. Over the lifetime, 5434 publications have been published within this topic receiving 149016 citations.

Video Encryption: A Survey

Abstract: Multimedia data security is becoming important with the continuous increase of digital communications on internet. The encryption algorithms developed to secure text data are not suitable for multimedia application because of the large data size and real time constraint. In this paper, classification and description of various video encryption algorithms are presented. Analysis and Comparison of these algorithms with respect to various parameters like visual degradation, encryption ratio, speed, compression friendliness, format compliance and cryptographic security is presented.

Cryptographic method and computer program product for use in wireless local area networks

Abstract: An encryption system and method that may encrypt all of the transmitted and received data packets on the data link layer without collisions on the Initialization Vector (IV). In the encryption system and method a new final key value may be generated and applied to every transmitted and received data packet. The encryption system and method provide for a novel three phase algorithmic process for generating a final secret key.

Enhance security of advance encryption standard algorithm based on key-dependent S-box

Abstract: Cryptographic algorithms uniquely define the mathematical steps required to encrypt and decrypt messages in a cryptographic system. Shortly, they protect data from unauthorized access. The process of encryption is a crucial technique to ensure the protection of important electronic information and allows two parties to communicate and prevent unauthorized parties from accessing the information simultaneously. The process of encrypting information is required to be dynamic in nature to ensure protection from novel and advanced techniques used by cryptanalysts. The substitution box (S-box) is a key fundamental of contemporary symmetric cryptosystems as it provides nonlinearity to cryptosystems and enhances the security of their cryptography. This paper discusses the enhancement of the AES algorithm and describes the process, which involves the generation of dynamic S-boxes for Advance Encryption Standard (AES). The generated S-boxes are more dynamic and key-dependent which make the differential and linear cryptanalysis more difficult. NIST randomness tests and correlation coefficient were conducted on the proposed dynamic AES algorithm, their results showing that it is superior to the original AES with security verified.

Chaotic algorithms for data encryption

Abstract: A system of encryption based on chaotic algorithms is described. The system is used for encrypting text and image files for the purpose of creating secure data bases and for sending secure e-mail messages. The system is also implemented on an FPGA for real-time applications. Levels of security several orders of magnitude better than published systems have been achieved.

Performance study of selective encryption in comparison to full encryption for still visual images

Abstract: Securing digital images is becoming an important concern in today’s information security due to the extensive use of secure images that are either transmitted over a network or stored on disks. Image encryption is the most effective way to fulfil confidentiality and protect the privacy of images. Nevertheless, owing to the large size and complex structure of digital images, the computational overhead and processing time needed to carry out full image encryption prove to be limiting factors that inhibit it of being used more heavily in real time. To solve this problem, many recent studies use the selective encryption approach to encrypt significant parts of images with a hope to reduce the encryption overhead. However, it is necessary to realistically evaluate its performance compared to full encryption. In this paper, we study the performance and efficiency of image segmentation methods used in the selective encryption approach, such as edges and face detection methods, in determining the most important parts of visual images. Experiments were performed to analyse the computational results obtained by selective image encryption compared to full image encryption using symmetric encryption algorithms. Experiment results have proven that the selective encryption approach based on edge and face detection can significantly reduce the time of encrypting still visual images as compared to full encryption. Thus, this approach can be considered a good alternative in the implementation of real-time applications that require adequate security levels.