Comparison between RSA and CAST-128 with Adaptive Key for Video Frames Encryption with Highest Average Entropy

Abstract

Encryption of data is translating data to another shape or symbol which enables people only with an access to the secret key or a password that can read it. The data which are encrypted are generally referred to as cipher text, while data which are unencrypted are known plain text. Entropy can be used as a measure which gives the number of bits that are needed for coding the data of an image. As the values of pixel within an image are dispensed through further gray-levels, the entropy increases. The aim of this research is to compare between CAST-128 with proposed adaptive key and RSA encryption methods for video frames to determine the more accurate method with highest entropy. The first method is achieved by applying the "CAST-128" and the second is achieved by applying the "RSA ". CAST-128 utilizes a pair of sub-keys for each round as a quantum of five bits that was utilized as a key of rotation for each round and a quantum of 32 (bits) was utilized as a key of masking into a round . The proposed adaptive 128-bits key can be extracted from the main diagonal of each frame before encryption. RSA is a public-key cryptographic technique which can be known as (asymmetric) cryptography. An asymmetry of a key depends on factoring a product of two big prime values. A comparison was applied on several videos and the results showed that CAST-128 method proved the highest degree of entropy even if the frames have lots of distorted data or unclear image pixels. For example, the entropy value of a sample of a girl video is 2581.921 when using CAST-128, while it is 2271.329 when using the RSA; also the entropy value of a sample of a scooter video is 2569.814 when using the CAST-128, while it is 2282.844 when using RSA.

A Proposed Text Encryption inside Video Using Harris Corner Detection and Salas20 Encryption Algorithm

“…Once these corner points are detected, they can be used as anchors for embedding the encrypted text. The video is essentially a combination of several edges, and each of the individual casings that make up a video has a set frame rate 22 . The 25 edges are caught in one second because the average casing rate is 25.…”

“…In order to determine which encryption method has the greatest entropy and accuracy for video frames, Khudair ET et al 22 compare the RSA and CAST-128 encryption methods. The results demonstrate that even when dealing with distorted or ambiguous image pixels, CAST-128 surpasses RSA in terms of entropy.…”

“…Different information formats may now be legally accessed by an authentic user thanks to encryption techniques 22 . Any system that needs high-speed encryption, like SSL 23 and WEP 24 , can benefit from effective stream cipher implementations.…”

تحليل كفاءة طريقة جديدة لتشفير الصور بناء على تحويلات أبوده

“…In addition to this, they have invented a method of image encryption that takes use of a novel S-box that is produced by a system that is characterized as being hyper-chaotic. This technique has a variety of benefits, including a clear structure, an outstanding encryption performance, and a rapid encryption speed [26][27][28] . Cryptanalysis is another important field of research that focuses on deciphering encryption keys or searching for cipher text.…”

Hidden Treasures of Kediri’s Medicinal Plants: A Collaborative Effort to Map and Validate Authentic Information Using Innovative QR Code Security and Cryptography

“…This technology is intended to make accessing information easier for the public. Systems that use QR Codes can provide good use of data validation by adding cryptographic-based security [12]- [15]. Implementing a QR code and digital signature-based document authentication system can ensure the authenticity and integrity of documents to prevent document forgery.…”