Chandan Dey

Improved Related-Key Differential Attacks against AES-256

Anubhab Baksi, Ajay Das, Smita Das, Patrick Derbez et autres

In this paper, we revisit the differential meet-in-the-middle attack and classical differential attack on AES-256 under the related-key setting, as introduced in Boura et al.'s ToSC 2023 and Song et al.'s Asiacrypt 2024 works. We propose new attacks against 13-round AES-256, all …

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Assessment of Water Quality and Treatment Efficiency in the Southwestern Region of Bangladesh: A Case Study on KUET Campus

Chandan Dey, Tanvir Alam, Chinmoy Mollik, Partho Pritom Bain

Rapidly growing population and migration to urban areas in developing countries have resulted in a vital need for the establishment of centralized water supply systems to distribute potable water to households. In the south-western region of Bangladesh at the KUET campus, there …

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A Laboratory Study on Compaction Behavior of Plastic Soils Mixed with Recycled Aggregates

Tanvir Alam, Chandan Dey, Chinmoy Mollik, Partho Pritom Bain

The use of recycled aggregate in geotechnical engineering to enhance soil properties has received considerable attention in recent times. The use of recycled aggregate from demolition waste in conjunction with fine-grained soil is one of the most promising ways to recycle this …

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Production control of a manufacturing system with quality-sensitive demand and emission of carbon via equilibrium optimizer algorithm

Hachen Ali, Subhajit Das, Chandan Dey, Manan Mal et autres

In the current highly competitive market scenario, every manufacturing firm strives to produce reliable, high-quality items to gain a valuable reputation in the industrial sector. Moreover, the quality of these items attracts consumers’ attention more effectively, thereby increasing competitiveness among manufacturing organizations. …

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Enhancing the Key Recovery Attack on Round Reduced Salsa

Chandan Dey, Sabyasachi Dey, Rahul Girme, Santanu Sarkar

Salsa is the most well-known stream cipher and a finalist of the eSTREAM project. The concept of probabilistic neutral bits (PNBs) first presented by Aumasson et al., is the most important step in the cryptanalysis of Salsa. In this paper, we provide …

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A new distinguishing attack on reduced round ChaCha permutation

Chandan Dey, Santanu Sarkar

This work concentrates on differential-linear distinguishing attacks on the prominent ARX-based permutation ChaCha. Here, we significantly improve the 7-round differential-linear distinguisher for ChaCha permutation by introducing a new path of linear approximation. We first introduce a new single-bit differential distinguisher for the …

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Differential faultt attack on DEFAULT

Chandan Dey, Sumit Kumar Pandey, Tapabrata Roy, Santanu Sarkar

Block cipher DEFAULT has been proposed as a differential fault analysis immune cipher at Asiacrypt 2021. In this paper, we consider the initial version of DEFAULT with no permutation involved in the last round and show that one can find the key …

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Revisiting Cryptanalysis on ChaCha From Crypto 2020 and Eurocrypt 2021

Sabyasachi Dey, Chandan Dey, Santanu Sarkar, Willi Meier

ChaCha has been one of the most prominent ARX designs of the last few years because of its use in several systems. The cryptanalysis of ChaCha involves a differential attack that exploits the idea of Probabilistic Neutral Bits (PNBs). For a long …

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Differential fault attack on DEFAULT.

Chandan Dey, Sumit Kumar Pandey, Tapabrata Roy, Santanu Sarkar