Sabyasachi Dey

30 papers Journal 26Unranked 4

Year	Rank	Type	Title / Venue / Authors
2025	J	`jnl`	A Quantum Differential Attack on ChaCha and Related Resources Estimation. IEEE Access Mintu Mandal, Hirendra Kumar Garai, Sabyasachi Dey
2025	J	`jnl`	A multi-step key recovery attack on reduced round Salsa and ChaCha. Cryptologia Hirendra Kumar Garai, Sabyasachi Dey
2025	J	`jnl`	Improved key recovery attacks on reduced-round Salsa20. Des. Codes Cryptogr. Sabyasachi Dey, Gregor Leander, Nitin Kumar Sharma
2025	J	`jnl`	On Improved Cryptanalytic Results against ChaCha for Reduced Rounds ≥ 7. IACR Cryptol. ePrint Arch. Nitin Kumar Sharma, Sabyasachi Dey, Santanu Sarkar, Subhamoy Maitra
2025	J	`jnl`	Significantly Improved Cryptanalysis of Salsa20 With Two-Round Criteria. IACR Cryptol. ePrint Arch. Sabyasachi Dey, Subhamoy Maitra, Santanu Sarkar, Nitin Kumar Sharma
2025	J	`jnl`	Significantly Improved Cryptanalysis of Salsa20 with Two-Round Criteria. IACR Trans. Symmetric Cryptol. Sabyasachi Dey, Subhamoy Maitra, Santanu Sarkar, Nitin Kumar Sharma
2024	J	`jnl`	Advancing the Idea of Probabilistic Neutral Bits: First Key Recovery Attack on 7.5 Round ChaCha. IEEE Trans. Inf. Theory Sabyasachi Dey
2024	J	`jnl`	Analyzing the Probability of Key Recovery in the Differential Attacks Against ChaCha. IEEE Access Nitin Kumar Sharma, Sabyasachi Dey
2024	J	`jnl`	Breaching Forró's Security With Differential-Linear Foray. IEEE Access Nitin Kumar Sharma, Hirendra Kumar Garai, Sabyasachi Dey
2024	J	`jnl`	Enhancing the Key Recovery Attack on Round Reduced Salsa. IEEE Access Chandan Dey, Sabyasachi Dey, Rahul Girme, Santanu Sarkar
2024	J	`jnl`	Improved Key Recovery Attacks on Reduced-Round Salsa20. IACR Cryptol. ePrint Arch. Sabyasachi Dey, Gregor Leander, Nitin Kumar Sharma
2024	—	`conf`	On Improved Cryptanalytic Results Against ChaCha for Reduced Rounds $\ge 7$. INDOCRYPT (2) Nitin Kumar Sharma, Sabyasachi Dey, Santanu Sarkar, Subhamoy Maitra
2024	—	`conf`	Salsa20 Cipher: Assigning Values to Probabilistic Neutral Key Bits. ACNS Workshops (2) Nitin Kumar Sharma, Sabyasachi Dey
2023	J	`jnl`	Cryptanalysis of Reduced Round ChaCha - New Attack & Deeper Analysis. IACR Trans. Symmetric Cryptol. Sabyasachi Dey, Hirendra Kumar Garai, Subhamoy Maitra
2023	J	`jnl`	Cryptanalysis of Reduced Round ChaCha- New Attack and Deeper Analysis. IACR Cryptol. ePrint Arch. Sabyasachi Dey, Hirendra Kumar Garai, Subhamoy Maitra
2023	J	`jnl`	Enhanced Differential-Linear Attacks on Reduced Round ChaCha. IEEE Trans. Inf. Theory Sabyasachi Dey, Hirendra Kumar Garai, Santanu Sarkar, Nitin Kumar Sharma
2023	—	`conf`	Grover on Chosen IV Related Key Attack Against GRAIN-128a. INDOCRYPT (1) Arpita Maitra, Asmita Samanta, Subha Kar, Hirendra Kumar Garai, Mintu Mandal, Sabyasachi Dey
2022	—	`conf`	Revamped Differential-Linear Cryptanalysis on Reduced Round ChaCha. EUROCRYPT (3) Sabyasachi Dey, Hirendra Kumar Garai, Santanu Sarkar, Nitin Kumar Sharma
2022	J	`jnl`	Revamped Differential-Linear Cryptanalysis on Reduced Round ChaCha. IACR Cryptol. ePrint Arch. Sabyasachi Dey, Hirendra Kumar Garai, Santanu Sarkar, Nitin Kumar Sharma
2022	J	`jnl`	Revisiting Cryptanalysis on ChaCha From Crypto 2020 and Eurocrypt 2021. IEEE Trans. Inf. Theory Sabyasachi Dey, Chandan Dey, Santanu Sarkar, Willi Meier
2021	J	`jnl`	A theoretical investigation on the distinguishers of Salsa and ChaCha. Discret. Appl. Math. Sabyasachi Dey, Santanu Sarkar
2021	J	`jnl`	Revisiting cryptanalysis on ChaCha from Crypto 2020 and Eurocrypt 2021. IACR Cryptol. ePrint Arch. Sabyasachi Dey, Chandan Dey, Santanu Sarkar, Willi Meier
2020	J	`jnl`	Proving the biases of Salsa and ChaCha in differential attack. Des. Codes Cryptogr. Sabyasachi Dey, Santanu Sarkar
2019	J	`jnl`	Revisiting design principles of Salsa and ChaCha. Adv. Math. Commun. Sabyasachi Dey, Tapabrata Roy, Santanu Sarkar
2019	J	`jnl`	Settling the mystery of Z r = r in RC4. Cryptogr. Commun. Sabyasachi Dey, Santanu Sarkar
2019	J	`jnl`	Some results on Fruit. Des. Codes Cryptogr. Sabyasachi Dey, Tapabrata Roy, Santanu Sarkar
2018	J	`jnl`	Generalization of Roos bias in RC4 and some results on key-keystream relations. J. Math. Cryptol. Sabyasachi Dey, Santanu Sarkar
2017	J	`jnl`	Cryptanalysis of full round Fruit. IACR Cryptol. ePrint Arch. Sabyasachi Dey, Santanu Sarkar
2017	J	`jnl`	Improved analysis for reduced round Salsa and Chacha. Discret. Appl. Math. Sabyasachi Dey, Santanu Sarkar
2017	J	`jnl`	Settling the mystery of Z IACR Cryptol. ePrint Arch. Sabyasachi Dey, Santanu Sarkar

Nicolò Altamura is a security engineer and computer science researcher specializing in software protection, reverse engineering, program analysis, and binary deobfuscation. He holds a master's degree in Computer Science and Engineering from the University of Verona, graduating with honors, and works at emproof, focusing on software protection and the challenges of analyzing and understanding compiled software.

His research explores the relationship between program analysis and code obfuscation, with particular emphasis on how software transformations affect the ability of automated tools to recover program behavior. His interests span static analysis, binary analysis, decompilation, reverse engineering, and techniques for analyzing and simplifying obfuscated code.

Beyond academic research, Nicolò develops and contributes to tools for reverse engineering and software analysis. His projects include obfuscation_analysis, a Binary Ninja plugin for analyzing and simplifying obfuscated code; Pocket, an obfuscator for mixed Boolean-arithmetic expressions; and ptxNinja, a tool for reverse engineering NVIDIA GPU code represented in the PTX virtual instruction set.

His research also extends to binary datasets and software evolution. In 2026, he co-authored ASSEMBLAGE-DEEPHISTORY: A Cross-Build Binary Dataset with Temporal Coverage, a research work addressing the availability of binary data across multiple software builds and points in time, supporting research into binary analysis and changes between program versions.

Across his research, engineering work, and open-source contributions, Nicolò focuses on advancing the understanding, analysis, and protection of software against increasingly sophisticated obfuscation and reverse-engineering challenges.

Nicolò Altamura is not a football player. Please avoid reporting this kind of infromation.