Among various traditional investment tools, stock investment is one of the easily understood targets for ordinary people because the concept of trading stocks is relatively clear and simple. However, for investors, the essential task of accurately forecasting future trends or market prices of stocks is difficult, since the factors that can affect the performance of stocks in the trading market are diverse. Therefore, the problems involved in forecasting stock prices continuously attracts great interest from both researchers and practitioners. Investors making short-term stock investments, especially, prefer to forecast stock prices via technical indicators calculated based on stock-trading information. In addition, an investor pays very close attention to the institutional investors’ net buy or net sell of each day , because its value can reflect future expectation about the overall performance of a corporation, as well as judgement regarding the future trends of stock prices. Therefore, this study proposes a stock price forecasting procedure based on genetic programming (GP) and cluster analysis, using technical indicators as predictors in an empirical study on the effects of institutional investors’ net buy or net sell in forecasting stock prices in Taiwan. The feasibility and effectiveness of the proposed procedure are illustrated through examining five stocks with the highest trading volumes in the semiconductor section of the TAIEX (Taiwan Capitalization Weighted Stock Index). The implementation results show that the stock price modelling procedure applying the GP method is a robust and practical forecasting technique. Institutional investors’ net buy/net sell of stocks can indeed improve forecasting performance. Furthermore, forecasting accuracy can be further refined through classifying the trends in institutional investors’ net buy/net sell.

Steganography refers to the information hiding. The main purpose of steganography is to hide the data behind images. It means that it encrypts the text in the form of image. The steganography is done when the communication takes place between sender and receiver [5]. Now a day’s in data transfer over the network, the security is the main issue  concerned  with  this.  In  order  to  secure  the  data  while  transmission  steganography is  used.  Before  the development of the steganography, Security of the data is the main concern of research for the researchers. The number of techniques was developed in order to secure transmission. Steganography use algorithms for hiding the data. In this the data is hiding behind the cover image. The data is hidden character wise behind the pixels of the image. The various algorithms or techniques used for steganography are LSB-Hash, RSA Encryption and Decryption