Steganography Method Using Effective Combination of RSA Cryptography and Data Compression
Abhranil Bose, Akshat Kumar, Malaya Kumar Hota, Shubham Sherki · 2022 First International Conference on Electrical, Electronics, Information and Communication Technologies (ICEEICT) · 2022
In this modern era, technology is increasing at a rapid rate and making new developments. The growing use of the Internet amongst people around the world and availability of digital data and its sharing has driven researchers and professionals to pay particular attention to information security. Data security is of great need. The emergence of digital media has taken this to a complete new level. Users frequently need to store, send, or receive private information and the information needs to be protected against unauthorized access and attacks from intruder. The process of hiding data and information is known to be steganography it is done to provide information security. By using steganography, one can hide thousands of words even in an average sized image. Cryptography method enhances the security level. This proposed paper uses combination of RSA cryptography, data compression and Hash-LSB steganography technique to make the data secure. RSA cryptography algorithm is implemented as receiver will have to use private key to decrypt message because the confidential message has been encrypted using public key. The secret message is compressed using Huffman coding algorithm and the cover image is compressed using Discrete wavelet transform (DWT). The cover image lossy compression is to reduce the cover image's dimensions. Then Hash LSB algorithm is applied to the RSA encrypted data to put it into the cover image. The proposed algorithm is implemented in MATLAB. At last PSNR, SSIM, Compression ratio and MSE are calculated. Our proposed method is secure for digital data transmission and also reduces the time of sending data over the Internet.