Advanced encryption standard (AES) security enhancement using hybrid approach

D'souza, Flevina Jonese; Panchal, Dakshata

doi:10.1109/ccaa.2017.8229881

Cited by 62 publications

(18 citation statements)

References 6 publications

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“…The ciphertext size and encryption time results show that the overall encryption results in low computational requirements and high security. D'souza [21] proposes the AES algorithm with a hybrid approach to Dynamic Key Generation and Dynamic S-box Generation. This method adds more complexity in the data to increase confusion and diffusion in the ciphertext using Dynamic Key Generation.…”

Section: Related Workmentioning

confidence: 99%

The Dynamic Symmetric Four-Key-Generators System for Securing Data Transmission in the Industrial Control System

Riyadi¹,

Priyambodo²,

Putra³

2021

IJIES

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Most of the communication protocols in the Industrial Control System (ICS) are vulnerable to cyber-attacks. Initially, the network protocol was designed for reliable performance, and thus did not incorporate data transmission security features. Therefore, ICS requires adequate data transmission security. This paper suggests improving the security of data transmission through a dynamic symmetric four-key-generators system, wherein the system anticipates cyberattacks by generating four keys before encryption. It involves four generators: a random initial key generator, a keystream generator, a key scheduling algorithm generator, and a pseudo-random number algorithm generator. In the receiver section, the system generates three keys before decryption to ensure data confidentiality and to avoid cyberattacks. The test results show that the proposed system keyspace is ≈22048 bits, meaning that the key is more secure from brute force attacks. As a result, the cipher data have a correlation value of 0.00007. The entropy value is 7.99, indicating that the cipher data is more secure. Also, speed tests show that the processing time still qualifies as realtime.

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Section: Related Workmentioning

confidence: 99%

The Dynamic Symmetric Four-Key-Generators System for Securing Data Transmission in the Industrial Control System

Riyadi¹,

Priyambodo²,

Putra³

2021

IJIES

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“…Some previous studies have utilized asymmetric cryptography; for example, Purevjav, Kim & Lee (2016) and Harba (2017) employed Rivest Shamir Adleman (RSA), while Hong & Xuefeng (2013) and Xin (2015) used Elliptic Curve Cryptography (ECC). Other studies have applied symmetric cryptography, i.e., Altigani & Barry (2013) , D’souza & Panchal (2017) , Xin (2015) , and Harba (2017) used Advanced Encryption Standard (AES), while Hong et al (2017) implemented the Data Encryption Standard (DES) in combination with Rivest Code 4 (RC4). Singh et al (2015b) similarly used symmetric encoding, while Purevjav, Kim & Lee, (2016) combined a public key encryption system with a symmetric hash function, thereby ensuring that messages encrypted with the public key could only be decrypted reasonably quickly using the private key.…”

Section: Related Workmentioning

confidence: 99%

Improvement of nuclear facilities DNP3 protocol data transmission security using super encryption BRC4 in SCADA systems

Riyadi

Putra

Priyambodo

2021

PeerJ Computer Science

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Background Data transmissions using the DNP3 protocol over the internet in SCADA systems are vulnerable to interruption, interception, fabrication, and modification through man-in-the-middle (MITM) attacks. This research aims to improve the security of DNP3 data transmissions and protect them from MITM attacks. Methods This research describes a proposed new method of improving DNP3 security by introducing BRC4 encryption. This combines Beaufort encryption, in which plain text is encrypted by applying a poly-alphabetic substitution code based on the Beaufort table by subtracting keys in plain text, and RC4 encryption, a stream cipher with a variable-length key algorithm. This research contributes to improving the security of data transmission and accelerating key generation. Results Tests are carried out by key space analysis, correlation coefficient analysis, information entropy analysis, visual analysis, and time complexity analysis.The results show that to secure encryption processes from brute force attacks, a key of at least 16 characters is necessary. IL data correlation values were IL1 = −0.010, IL2 = 0.006, and IL3 = 0.001, respectively, indicating that the proposed method (BRC4) is better than the Beaufort or RC4 methods in isolation. Meanwhile, the information entropy values from IL data are IL1 = 7.84, IL2 = 7.98, and IL3 = 7.99, respectively, likewise indicating that the proposed method is better than the Beaufort or RC4 methods in isolation. Both results also show that the proposed method is secure from MITM attacks. Visual analysis, using a histogram, shows that ciphertext is more significantly distributed than plaintext, and thus secure from MITM attacks. The time complexity analysis results show that the proposed method algorithm is categorized as linear complexity.

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“…Using text and audio data for encryption, less encryption and decryption time was observed when compared to the conventional 128 bit AES algorithm. Similarly, Elliptic Curve Cryptography (ECC) was employed in [21] to generate irreversible random numbers used as AES secret keys. X and Y coordinates used for random number generation improved the entropy of the random numbers generated.…”

Section: Related Workmentioning

confidence: 99%

Modified Advanced Encryption Standard Algorithm for Information Security

et al. 2019

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The wide acceptability of Advanced Encryption Standard (AES) as the most efficient of all of the symmetric cryptographic techniques has further opened it up to more attacks. Efforts that were aimed at securing information while using AES is still being undermined by the activities of attackers This has further necessitated the need for researchers to come up with ways of enhancing the strength of AES. This article presents an enhanced AES algorithm that was achieved by modifying its SubBytes and ShiftRows transformations. The SubBytes transformation is modified to be round key dependent, while the ShiftRows transformation is randomized. The rationale behind the modification is to make the two transformations round key dependent, so that a single bit change in the key will produce a significant change in the cipher text. The conventional and modified AES algorithms are both implemented and evaluated in terms avalanche effect and execution time. The modified AES algorithm achieved an avalanche effect of 57.81% as compared to 50.78 recorded with the conventional AES. However, with 16, 32, 64, and 128 plain text bytes, the modified AES recorded an execution time of 0.18, 0.31, 0.46, and 0.59 ms, respectively. This is slightly higher than the results obtained with the conventional AES. Though a slightly higher execution time in milliseconds was recorded with the modified AES, the improved encryption and decryption strength via the avalanche effects measured is a desirable feat.

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Advanced encryption standard (AES) security enhancement using hybrid approach

Cited by 62 publications

References 6 publications

The Dynamic Symmetric Four-Key-Generators System for Securing Data Transmission in the Industrial Control System

The Dynamic Symmetric Four-Key-Generators System for Securing Data Transmission in the Industrial Control System

Improvement of nuclear facilities DNP3 protocol data transmission security using super encryption BRC4 in SCADA systems

Modified Advanced Encryption Standard Algorithm for Information Security

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