A Complex Matrix Private Key to Enhance the Security Level of Image Cryptography

Abstract

Standard methods used in the encryption and decryption process are implemented to protect confidential data. These methods require many arithmetic and logical operations that negatively affect the performance of the encryption process. In addition, they use private keys of a specific length, in addition to the fixed length of the data block used in encryption, which may provide the possibility of penetration of these methods, thus decreasing the level of security. In this research paper, a new method of digital image cryptography is introduced. This method is based on using a color image as an image_key to generate a sophisticated matrix private key (MPK) that cannot be hacked. The proposed method uses an initial state to set the required parameters, with secret information needed to generate the private key. The data-block size is variable, and the complicity of the MPK depends on the number of selected rounds and the data-block size. The proposed method is appropriate for publication in Symmetry because it employs a symmetrical complex matrix key to encrypt and decrypt digital images. The proposed method is simple yet very efficient in terms of throughput and scalability. The experiments show that the proposed method meets the quality requirements and can speed up the encryption–decryption process compared with standard methods, including DES, 3DES, AES, and Blowfish.

Rotation Left Digits to Enhance the Security Level of Message Blocks Cryptography

“…Some of other users and business owners prefer to dispense with the transfer of important or confidential data over the Internet. Therefore, they use external storage cards or disks to transfer data between devices [8], [9]. Other users and business owners are concerned in anti-virus programs and electronic piracy and they seek to obtain the programs from reliable companies that are more careful in adopting new and updated programs for detecting new viruses and malware.…”

“…The encryption process uses an encryption key that is a set of mathematical values agreed upon by both the sender and the receiver. The recipient uses the key to decrypt the ciphertext and convert it back to readable plain text [7], [8]. The more complex the encryption key, the more secure the encryption as third parties are less likely to be able to decrypt data through brute force attacks (i.e.…”

Multiple CLMMs Keys to Secure Message Transmission

“…In computing, unencrypted data is also known as common text, and encrypted data is called cipher text. The formulas used to encrypt and decrypt messages are called cipher algorithms or ciphers [55][56][57][58][59][60][61][62]. To be effective, encryption includes a variable as part of the algorithm.…”

“…With RSA, the public or private key can be used to encrypt a message; Whichever is not used for encryption becomes the decryption key (see figure 1) [40][41][42][43][44][45][46][47][48][49][50]. Today, many cryptographic processes use a symmetric algorithm to encrypt data and an asymmetric algorithm for secure secret key exchange [55][56][57][58][59][60][61][62].…”

“…-Simplicity, the method must be simple and easy to implement, it must suit any message with any length, changing the message, or changing the PK must not require any changes in the method algorithm [55][56][57][58][59][60][61][62].…”