Abstract: Design and Implementation of Steganography along with secured message services in Mobile Phones is used to provide security to the data that flows across the mobiles. In this paper encryption and steganography algorithms are implemented using JAVA™ with android platform to provide the security for real time multimedia messaging service system. Establishing hidden communication for mobile has become an important subject of security. One of the methods to provide security is steganography. Steganography is used to hide secret information inside some carrier. Hiding information, especially in images has been an alternative solution for secret communication. To improve the security, encrypted secret data will be hidden inside MMS. The image is made to be hidden into image from MMS which provides more secured transmission than text information embedded into the MMS. The Least Significant Bit (LSB) embedding technique is used to hide the secret information (image). Different sizes of secret

• Publication Date: 28-Apr-2013
• DOI: 10.15224/978-981-07-6260-5-28
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Abstract: In this paper, the additional dimension ‘time’ is used to synthesize cosecant squared shaped, beam pattern in linear antenna arrays with digitally controlled static amplitude and the phase shift of the array elements. The static amplitude and the phase shift are assumed to be obtained from the output of a five bit digital converter. For the desired shaped beam pattern, normalized on-time duration and the quantized value of the static amplitudes and phase shift are obtained by using Differential evolution (DE) algorithm. The search space of the static amplitudes, phase shift and switch on-time durations are considered as (0.05, 1), (0, 2π) and (0.04, 1) respectively. Thus with relatively low dynamic range ratio of static amplitude and sufficiently high value of on-time duration, the feed network of the antenna array can be designed easily. The proposed approach is demonstrated with a 30 element time modulated linear antenna array (TMLAA) by synthesizing the shaped beam pattern for the a

• Publication Date: 28-Apr-2013
• DOI: 10.15224/978-981-07-6260-5-29
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• Downloads: 0