Security Enhancement of AES-CBC and its Performance Evaluation Using the Avalanche Effect

Assafli, Hayder T.; Hashim, Ivan A.

doi:10.1109/iiceta50496.2020.9318803

Cited by 14 publications

(6 citation statements)

References 15 publications

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“…An enhanced encryption algorithm is used to encrypt images and evaluate the results. The encryption algorithm depends on epoch time as a nonce number for the initialization vector [22]. The enhanced encryption algorithm is never tested for image encryption purposes.…”

Section: Methodsmentioning

confidence: 99%

The Evaluation of Time-Dependent Initialization Vector Advanced Encryption Standard Algorithm for Image Encryption

Assafli¹,

Hashim²,

Naser³

2022

ETJ

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Sensitive data has to be protected from the public.• A strong encryption algorithm is required for protecting images. • Computing speed is growing, making algorithms vulnerable to attacks. • An enhanced AES-CBC algorithm is evaluated for the encryption proposed. • The algorithm satisfied the required standards and passed all tests.The Advanced Encryption Standard (AES) has become an attractive encryption method for high security and fast implementation. The encryption algorithm is approved as a standard for widely-used communication and data processing units. However, the advance in technology and the introduction of quantum computers made the encryption scheme vulnerable to attack. Different attack procedures are continuously developed to attack end decrypted important and sensitive data. This paper evaluated an enhanced Advanced Encryption System operating in Cipher Block Chaining mode, suggesting a promising solution for resisting future attacks. The approach depends on a time-dependent initialization vector that produces the initialization vector block depending on the epoch time without sharing any encryption key. The evaluation process includes correlation analysis, global and local Shannon entropy analysis, chi-square analysis, histogram analysis, and differential analysis. The results showed that the enhanced encryption scheme is reliable and can resist most cyber-attacks without exposing any encrypted data to the public. The results were compared with previously published and tested algorithms and found to satisfy and exceed the minimum requirement. So, the encryption method can be implemented safely in future communication channels or used in the file encryption process.

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Section: Methodsmentioning

confidence: 99%

The Evaluation of Time-Dependent Initialization Vector Advanced Encryption Standard Algorithm for Image Encryption

Assafli¹,

Hashim²,

Naser³

2022

ETJ

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“…The conventional AES typically operates on 128-bit blocks, employing cipher block chaining (CBC) mode for distinct encryption of each block. This mode, applicable across various AES block sizes, involves XORing the initial block with a 128-bit initialization vector (IV) before encryption, and this process repeats until the final block [23]. It's important to note that the flexibility of CBC mode extends beyond AES 128, allowing for varied encryption configurations [24].…”

Section: Cipher Block Chainingmentioning

confidence: 99%

Large file encryption in a reduced-round permutation-based AES file management system

Baladhay,

Gamido,

De Los Reyes

2024

IJEECS

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In the rapid evolving digital landscape, the imperative to ensure data security has never been more crucial. This paper addresses the pressing challenges in data security by introducing a file encryption management system, leveraging a modified advanced encryption standard (AES) algorithm with reduced round iterations and bit permutation. This system aims to comprehensively secure various file types, providing a dependable solution for file exchange. Our findings reveal substantial improvements in both encryption and decryption processes using the reduced-round permutation-based AES (RRPBA). The adapted algorithm demonstrates a significant 38.8% acceleration in encryption time and a remarkable 44.86% improvement in decryption time, positioning it as a pivotal component for efficient file operations within the management system. Moreover, the throughput assessments showcase a remarkable 33.73% improvement in encryption and 23.72% in decryption, outperforming the original AES, emphasizing the algorithm's superior computational effectiveness, signaling positive implications for future high-performance applications. In conclusion, the study not only addresses critical security challenges but also presents a viable solution with tangible speed advantages for file encryption and decryption processes within digital file management systems.

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“…The strict avalanche effect criterion (SAC) was introduced by Webstar and Tavars in 1985. The cryptographic algorithm satisfies the strict avalanche criterion; the output bits flipped 50% for single bit change in the input [17].It can be calculated as folows:…”

Section: Avalanche Effectmentioning

confidence: 99%

Enhancing the Security of Vigenere and Polybius Hybrid Cryptography System using Modified Linear Congruential Generation Algorithm

Muhammed,

Tsegaye,

Woldegiorgis

2024

Preprint

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In the arena of security, various encryption algorithms are used to protect information transmitted through insecure channels. Employing a hybrid encryption algorithm provides a strong defense and complicates the decryption process for potential intruders. A hybrid cipher system that combines the Vigenere and Polybius ciphers has proven to be more secure than each cipher alone. One strategy to bolster cipher security involves generating distinct cipher text results for the same plain text and key during different instances. However, hybrid algorithm faces vulnerable to different cryptanalysis attacks such as frequency analysis attack, brute force attack and dictionary attack due to the use of repeating nature of the Vigenere key and unmodified Polybius table for encryption. To address these challenges, we propose an algorithm introducing dynamic cipher text, a random key generated through a modified linear congruential generation algorithm, and a randomized Polybius table for each character using the Randi function. Simulation results demonstrate that the proposed algorithm achieves enhanced security metrics, supporting a 96% of avalanche effect, improved confusion and diffusion properties, a mere 1.54 % average occurrence of character in the cipher text, and a 0.01839 index of coincidence value. Therefore, the proposed algorithm outperforms existing hybrid algorithms in terms of security.

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Security Enhancement of AES-CBC and its Performance Evaluation Using the Avalanche Effect

Cited by 14 publications

References 15 publications

The Evaluation of Time-Dependent Initialization Vector Advanced Encryption Standard Algorithm for Image Encryption

The Evaluation of Time-Dependent Initialization Vector Advanced Encryption Standard Algorithm for Image Encryption

Large file encryption in a reduced-round permutation-based AES file management system

Enhancing the Security of Vigenere and Polybius Hybrid Cryptography System using Modified Linear Congruential Generation Algorithm

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