<p>A random number can be defined as a set of numbers produced by a numerical function, in which the next number is unpredictable and a relationship between successive occurrences is lacking. Moreover, these sequences cannot be reproduced unless the same generator function with an exact initial value is used. The design of a random number generator must overcome the previous problems of a low periodic and the capacity to reproduce the same sequence. This paper proposes the knight tour as a tool for generating pseudo random numbers. These random numbers can be use in the encryption process or in a password generator for network administrators. The randomness test suite is used to ensure the randomness of outcome sequences. Roughly, 75% of the test results obtained is better than the results from other works. The statistical properties and security analysis indicate that the knight tour application is highly successful in generating a pseudo random number with good statistical results, high linear complexity and strong capacity to withstand attacks.</p>
In this paper, we have given the design and development of a new wearable device that assists visually impaired individuals to travel independently and confidently. The newly proposed device is based on range-based sensors and would work effectively in both indoor and outdoor conditions. It is constructed in the form of two separate modules; one module is designed such that it can be attached to the waist belt of the user, and the other module is designed to wear it on ankle of the user. Both the modules communicate with each other using wireless communication and can cover the full front environment of the user. The information about the front environment is transmitted to the user, via headphone, by sending a set of voice instructions, stored in a memory card added in the belt module. In order to use the device in crowd mode, appropriate networking techniques were also implemented in the prototype such that the interference of two or more devices in the close vicinity can be avoided. In the end, effectiveness of the device is analyzed and proved by conducting experiments and obtaining statistical results.
This research is inspired by the constraints of the present video steganography methods and to enhance their performance. It contributes its objective via employing the transforming steps to involve the processing of both cover videos and clandestine information for improving their robustness and security. Consuming a part of every frame as areas of concentration for the hiding procedure, this leads to improve the video imperceptibility resulted from steganography. In view of that, selecting the coefficients for embedding information in the video. Subsequently it adds obstacle in front of intruders to identify the place of the hidden information within frames since they are just covered within such coefficients, this dynamically changes depending on both the video frame and clandestine information, it is essential to save the embedding robustness and security. Converting the cover into a frequency domain like DWT will enhance the steganographic robustness counter to threats.
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