A new multi-level key block cypher based on the Blowfish algorithm

Abstract

Blowfish is a block cypher algorithm used in many applications to enhance security, but it includes several drawbacks. For example, the mix between the key and data is limited. This paper presents a new modification to the Blowfish algorithm to overcome such problems realised through a multi-state operation instead of an XOR. Our proposed algorithm uses three keys in the encryption and decryption processes instead of one for controlling the variable block bits sizes (1, 2, 4, and 8) bits and for determining the state table numbers. These tables are formed from the addition in a Galois field GF (2 n ) based on block bit size to increase the complexity of the proposed algorithm. Results are evaluated based on the criteria of complexity, time encryption, throughout, and histogram, and show that the original Blowfish, those modified by other scholars, and our proposed algorithm are similar in time computation. Our algorithm is demonstrated to be the most complex compared with other well-known and modified algorithms. This increased complexity score for our proposed Blowfish makes it more resistant against attempts to break the keys.

Kernel rootkit detection multi class on deep learning techniques

“…When the MLP algorithm was applied, an accuracy of 99.96% was achieved in representing the malware dataset. Conversely, when the same dataset was subjected to the RBFN [25] algorithm, an accuracy of 99.82% was obtained. An accuracy of 98.62% was achieved when the RBFN algorithm was utilized to represent the dynamic API dataset.…”

An innovative method for enhancing advanced encryption standard algorithm based on magic square of order 6

“…Step2.1: Apply multiplication between mask encryption and Magic Square over Galois Field. Step2.2: Apply summation of Magic Square using the equations (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)…”

“…For the public key, it is employed for encryption, whereas the private key is employed for decryption (e.g. Rivest Shamir Adleman (RSA)) [3]- [5]. A public key encryption is based on mathematical operations, which is computationally strong.…”

A New Block Cipher Algorithm Using Magic Square of Order Five and Galois Field Arithmetic with Dynamic Size Block

“…Before retrieving the original text, the work will be changed to a linear equation system and noting that the number of equations is equal to the number of unknowns to be solved. before solving the work by Gaussian elimination or anyway is chosen requires arranging the equations in such a way that the main diagonal does not contain the value zero, and the final result of the Gaussian elimination method will restore the plain text [15,18]. Cryptography is a science that uses mainly mathematics to encode and decode data by using algorithms with the help of a key [14].…”

“…Multi-level keys is a system that consists of more than one layer of keys, in such a way that the information is stored in a small database and the required key sequence is chosen from it [15]. In this proposed paper, we will use magic square, GF with both types, Additional message length, Multi-level keys, and Extra Key, in order, as will be seen later.…”