Heri Nurdiyanto, Robbi Rahim, Saiful Nurarif, Mukhlis Ramadhan
Currently, data security is crucial so as not to fall into the hands of irresponsible, steganography and cryptography is a technique commonly used to secure information from irresponsible parties by using computational algorithms such as Pixel Value Differencing Algorithm on steganography process and GOST (Government Standard) for the cryptographic process, so that the process of insertion of messages (steganography) in the image will be encrypted first newly inserted, this process is expected to increase the security of confidentiality and integrity because Pixel Value Differencing Algorithm process used to add messages by changing the hexadecimal pixel color with hexadecimal message Encryption algorithm GOST. © 2017 IEEE.
Doctoral Technology and Vocational Education, Yogyakarta State University, Yogyakarta, Indonesia; Department of Computer Engineering, Institut Teknologi Medan, Medan, Indonesia; Department of System Computer, STMIK Triguna Dharma, Medan, Indonesia
