A performance analysis StegoCrypt algorithm based on LSB-AES 128 bit in various image size

Many people have used the internet in daily communication. The rise of internet data theft makes the security of data transmission becomes very important. Cryptography and Steganography is a technique that is widely used to secure data so that data can not be accessed by unauthorized persons. Cryptography is a technique of message randomization, while steganography is a data-hiding technique. Combination Stego-Crypto Least Significant Bit (LSB) — Advanced Encryption Standard (AES) is widely proposed in previous studies because of its reliability in providing multiple protection. The secret message is encrypted with the AES method before it is embedded into the image using LSB. In this study, analyzing the performance of a combination of LSB-AES algorithms on various cover image sizes. The cover image used is RGB color images. To measure imperceptibility performance is used Peak Signal to Noise Ratio (PSNR), Mean Square Error (MSE), and Histogram. The measurement is done by comparing the original image with the resulting image. From the test results, we get a very good value PSNR with an average value above 70dB. The results of encryption and decryption can work perfectly. To test cryptographic performance is measured by time and entropy. The results of the test show good cryptographic quality.