Enhanced and authenticated cipher block chaining mode

Abstract

Due to the increased attacks on different applications, data security has become crucial. Many modes can be used to operate the advanced encryption standard (AES), some of which provide integrity, and some outperform other modes in security and simplicity. In this paper, the chain block cipher (CBC) mode has been modified to provide more security to the encrypted data by making it robust against the bit-flipping attack and adding an integrity approach using the keyedhash function. In addition, using the keyd-hash function increases the number of keys needed in CBC-AES to two keys, and this can make the proposed model more secure against bruteforce attacks and Grover’s quantum search algorithm.

BANK OF PASSWORDS: a secure Android password manager implemented based on specific requirements

“…Encrypting: For encrypting new passwords, we intend to use AES in CBC mode with 256-bit keys to provide a higher level of security and robustness against attacks. Using AES in CBC mode with a 256-bit key will ensure the data's confidentiality and integrity, making it suitable for applications requiring high-security levels [14]. The CBC mode has been modified to enhance the security of encrypted data by protecting against bitflipping attacks and adding an integrity approach using the keyed-hash function [15] [16].…”

“…The CBC mode has been modified to enhance the security of encrypted data by protecting against bitflipping attacks and adding an integrity approach using the keyed-hash function [15] [16]. Also, using a 256-bit key in AES further strengthens the security of the encryption, making it more resistant to brute-force attacks and Grover's quantum search algorithm [14]. To meet technical requirements (in Sec.…”