COMBINATION OF PIXEL VALUE DIFFERENCING ALGORITHM WITH CAESAR ALGORITHM FOR STEGANOGRAPHY

Steganography is a method that can be used to secure information. Steganography is hiding information or messages into other media such as digital images, text, voice or video so as not to arouse suspicion of others. Steganography methods that are widely used today still have shortcomings regarding quality, capacity, and robustness. Therefore, it needs steganography methods other better, and to add to the information security, steganography can combine with cryptography. Steganography method used is the method of pixel value differencing (PVD). This approach can insert a message more to the pixels you pick a high contrast value. To increase the security level of information to be embedded into the image, use cryptography such as Caesar cipher algorithm. Caesar cipher is an algorithm that used as a standard encryption by using an alphabet. Research conducted that combine cryptography steganography in digital imagery. Then testing the steganographymethods used to determine the capacity of the image, the performance of the method pixel value differencing (PVD), the resulting image quality, and resistance to manipulation of image and Steganalysis