Comparison of LSB Image Steganography Technique in Different Color Spaces

The incredible progress of technology has made the use of communication and information technologies indispensable because of the possibilities it offers. These possibilities increased the security issues on personal information and communication security problems such as phone calls, retrieving e-mail contents, copying private information on computers. Encryption algorithms used in classical security approaches, while ensuring the confidentiality of information, cannot provide the principle of "imprecision" that has become increasingly important in recent times. A coded or encrypted text can be solved by advanced machines when focused on it. So the key point is "do not raise suspicion". For this reason, steganography and watermarking methods that put the invisibility of the existence of a secret message into the primary goal are especially the focus of interest after 2000's years. In this study, Least Significant Bit (LSB) technique, which is the most basic and commonly used technique in steganography, was applied to 3 different images in different color spaces. When the obtained results were compared according to the image quality evaluation criteria, it has been seen that the images in Hue-Saturation-Intensity (HSI) color spaces had better performances and successes to the other color spaces.