Abstract:
Steganography is a technique that uses cryptography to encrypt secret data, thereby passing
confidential data through the transmission channel from the sender to the receiver, even though
this secret data is very difficult for an intruder to capture because the data is not easily detectable.
This paper, explores an innovative approach to image steganography, integrating the Blowfish
encryption algorithm and an Edge-based Pixel Selection technique to enhance the security and
imperceptibility of hidden data. The encryption process involves the Blowfish algorithm for robust
protection of confidential information, while the Edge-based Pixel Selection method ensures
discreet embedding within the image. Blowfish is a very strong algorithm because it’s key length
is not fixed means variable, also it can range from 32 bits to 448 bits. This flexibility allows users
to adapt the key size based on their specific security requirements. A longer key generally provides
better resistance against brute-force attacks and provides data security. Furthermore, Sobel edge
detection can help identify regions of an image that are less sensitive to human perception.
Embedding information in regions with existing high gradients (edges) might make the
modification less noticeable. The contribution of this work lies in its ability to significantly
improve imperceptibility compared to existing methods, providing a strong and elegant method of
data hiding in image steganography field.
