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Purbasari, Imas
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Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Industrial & Manufacturing Engineering Social Sciences

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Practical Evaluation and Complexity Analysis of Forgery Attacks on the PAES-8 Authenticated Encryption Scheme Windarta, Susila; Purbasari, Imas
Buletin Pos dan Telekomunikasi Vol. 22 No. 2 (2024): December 2024
Publisher : Centre for Research and Development on Resources, Equipment, and Operations of Posts and I

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17933/bpostel.v22i2.403

Abstract

The Parallelizable Authenticated Encryption Scheme (PAES)-8, designed by Ye et al. in 2014, claims to provide 128-bit authentication security in the nonce-misuse model. However, Sasaki and Wang's theoretical forgery attack on PAES-8 exposed vulnerabilities, suggesting a universal forgery with a complexity of approximately . This study presents a practical implementation of Sasaki and Wang’s theoretical forgery attack on the PAES-8 encryption scheme, uncovering significant modifications required for its execution. This including the use of DDT-based plaintext injection, staged state recovery, multiple injection attempts, and algorithmic adjustments. Our findings demonstrate that these modifications increase the attack complexity to approximately 211+212+27 = 212, indicating greater resistance in PAES-8 than previously anticipated. Future cryptanalysis should focus on exploring nonce-respecting models to evaluate the scheme’s security.
Co-Authors Windarta, Susila