Randomized Pixel Selection for Enhancing LSB Algorithm Security against Brute-Force Attack

Abstract

Steganography is the science of concealing a secret message by embedding it into innocent carriers such as text, audio, images, etc. It plays a crucial role in a broad range of security applications such as securing message exchange, user authentication and copyrighting. One of the most effortless and widely-used techniques is the age-old Least Significant Bits (LSB) algorithm, which can be implemented in both transformative and spatial domains. The advantage of this technique is that it can be used with any form of digital media. However, operating pixels on a sequential basis leaves the algorithm susceptible to many steganalysis techniques. Consequently, it is easy for the attacker to recognize the inclusion of a secret message within the media and thus to proceed with the extraction. Therefore, it is necessary to provide an extra layer of security to protect the data. In this study, we propose a random selection of pixels that hold a secret message based on an integer solution of the elliptic curve equation. In addition, we have embedded noise bits into the unused pixels to make the steganalysis process more difficult. The attacker not only needs to guess which pixels (out of all pixels in the image) have been selected to carry the secret, but also must arrange them in the correct order. The results show that the proposed algorithm achieves a significant security improvement in comparison to standard LSB when it comes to defending against bruteforce attacks with a subordinate effect of image quality.

A Unique Way to Generate Password at Random Basis and Sending it Using a New Steganography Technique

“…Thus the final password would be generated. This final password ensures high-level security [13]. For e.g., let time and date be 9:13:56 AM and 25/12/2017 respectively.…”

“…8, No. 3, September 2020: 525 -531 526 [6] compared to existing LSB [7,8,9] technique. Here, system date and time is taken to generate the password for each instance and then positions of the characters of the password are randomly changed to finalize the ultimate password which is chosen as confidential information.…”

American standard code for information interchange mapping technique for text hiding in the RGB and gray images

“…The factors that affected the steganography techniques which may make some difficulties of these techniques are the followings [8], [9]:  Invisibility: gives an indication of how similar the stego-picture for the original image [10], [11].  Payload/capacity: it gives a limited amount of data to be hidden in the spread media [12].…”