To increase the security of messages sent over internet steganography is used. Various steganography techniques have been proposed so far. Least Significant Bit steganography is one such technique in which least significant bit of pixels of the image is replaced with data bits. This approach has the advantage that it is simplest one to understand, easy to implement and results in stego-images that contain embedded data as hidden. The disadvantage of Least Significant Bit is that it is vulnerable to steganalysis and is not secure at all. So as to make it more secure, the least significant bit algorithm is modified to work in different way. This proposed approach simply does not pick up least significant bits of pixel in a sequence but is combined with midpoint circle approach to choose which pixels are used to hide message. The goals of this paper are to present theoretic analysis of Least Significant Bit approach and to propose an advanced LSB embedding scheme that exhibits not only the advantages of LSB but also provides additional level of security. The scheme breaks the regular pattern of LSB, resulting in increased difficulty of steganalysis and thereby raising the security level.Index Terms-image hiding, least significant bit (LSB), mid point, steganography

This is an endeavour to simulate the concept of determining type of Thyroidism after stipulating the TSH, T3 and T4 levels in the human body by using proposed analog circuit. The Analog devices like operational amplifiers have behaviour similar to the mathematical operations. Till date there are so many software-based techniques used for determination of effective dose to be provided to the patient so that normal level of Thyroxine can be maintained in the human body [1]. There is a need for hardware-oriented analog device to provide an accurate and efficient mean for calculation of effective dose amount and TSH, T3 and T4 values can be used. Basically, the voltages in the high-gain dc amplifiers are equated to these three variables and the operational amplifiers can do the mathematical operations on the voltages, although the accuracy of measuring voltage is limited to certain point. The simulation has been done using CircuitMaker.

The field of data hiding in digital image processing becomes important as the use of public networks such as the Internet becomes popular and activities of spam increases. Various methods have been proposed and implemented in data hiding. Steganography is one such way to increase the security of messages over the internet. The least significant is one of the methods used in steganography. While most methods work bit by bit value or pixel by pixel value to hide the data. The one disadvantage of such methods is that there is low percentage of data that can be hidden. In this paper, a new algorithm has been proposed that works on blocks of images that are found same or similar in other image. As in today era, the size of digital images are quite large as compared to images used in early years of digital processing and the images contain randomized pixel having blocks of different sizes and variations in colors. This leads to similarity of block of one image with part of other image of same domain and the same approach is used to hide an image inside another image. In this regard, blocks of hiding image are matched up to maximum size m*n with parts of cover image.

This is an effort to simulate the concept of treatment of different types of Thyroidism after determining the TSH, T3 and T4 levels in the human body. The target is to determine the effective dose of Thyroxine to be provided to the patient so that normal level of the same can be maintained in the human body. It interacts with every organ system and plays a crucial role in metabolism [1], but there is no software technique to bypass the doctors for the treatment of Thyroid malfunctioning. The Analog devices like operational amplifiers have features identical to the arithmetic operations. Primarily, the voltages in the high-gain dc amplifiers can be reduced to an average to these three variables and the operational amplifiers can do the arithmetic operations on the voltages, the accuracy of measuring voltage may be circumscribed to limited point. A Digital circuit has been implemented to determine the dosage required by the patients using the best market products. The simulation has been done using CircuitMaker ( Student version).