A Wavelet Transformation Technique and Cryptographic Encryption for Image Steganography

Confidentiality, Integrity, and Availability are the three fundamental principles of information security. Every user must ensure that the above principles are followed in all operations performed from server to client and vice versa. Sensitive data can be protected in the domain of information security by various methods such as data encryption, data hiding, and the implementation of some information security policies. Even though there are many data protection methods, imposters attempt to retrieve sensitive information and change the entire data or modify it to some extent or steal it. Communication in these days has become very simple as technology has advanced. It became a boon for intruders to steal information from users. “Steganography,” which hides data in any media file so that any intruder or a third party cannot read the hidden data, which makes it as one of the best techniques for preventing problems. When discussing steganographic techniques, image steganography takes precedence because it is very useful for users and requires very little bandwidth. The application of cryptography in steganography would ensure good and efficient results. We used both Advanced Encryption Standard (AES) and Blowfish in this proposed model, which are used for highly secure mechanisms that help to protect data. The Discrete Wavelet Transform (DWT) technique ensures encrypted data is hidden within the given image file and results in a stego image with a good Peak Signal Noise Ratio (PSNR).