Hello Universe!
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I’m Dhiman Saha. I love computer science and crypto. I mostly work in symmetric crypto particularly
cryptanalysis.
Recently I am focusing on:
- Automated Cryptanalysis
- Classical and Quantum Symmetric-Key Cryptanalysis
- Lightweight Cryptography
- Lattice Based Cryptography
My research group calls itself the de.ci.phe.red LAB. Also visit dhimans.in to know more about me.
News
- My research group is organizing the National Workshop on Cryptology 2025 from 7-9 December and a first of its kind Crypto Winter School 2025 from 9-12 December. Details are available at NWC and CWS respectively.
- Cryptanalysis of NLFSR-Based Lightweight Ciphers TinyJAMBU, KATAN, and
KTANTAN
Published in IEEE Transactions on Information Theory, 2025 [Read more] - ToFA: Towards Fault Analysis of GIFT and GIFT-like Ciphers Leveraging Truncated
Impossible
Differentials
Published in IACR TCHES 2025 [Read more] - Simple vs. vectorial: exploiting structural symmetry to beat the ZeroSum
distinguisher
Published in Designs, Codes and Cryptography, 2025 [Read more] - Asiacrypt 2024 [Web]
Selected Publications
-
TIDAL: Practical Collisions on State-Reduced Keccak Variants
Suryawanshi, Sahiba, Saha, Dhiman, and Jaiswal, Shashwat
ACNS 2023 -
Sycon: A New Milestone in Designing ASCON-like Permutations
Mandal, Kalikinkar, Saha, Dhiman, Sarkar, Sumanta, and Todo, Yosuke
Journal of Cryptographic Engineering 2021 -
Boomeyong: Embedding Yoyo within Boomerang and its Applications to Key Recovery Attacks
on AES and Pholkos
Rahman, Mostafizar, Saha, Dhiman, and Paul, Goutam
ToSC 2021 -
A Diagonal Fault Attack on the Advanced Encryption Standard
Saha, Dhiman, Mukhopadhyay, Debdeep, and Chowdhury, Dipanwita Roy
IACR Cryptol. ePrint Arch. 2009
Currently open positions at de.ci.phe.red LAB
Advertisement for the post of Research Associate-1 (01) in DST funded Research Project under National Quantum Mission
Please apply here (Last Date 14/01/2026)Additional Affiliations
- Adjunct Faculty - Bharti School Of Telecom Technology And Management - IIT Delhi.
Awards/Recognition
- Young Scientist in Cryptography 2019 (Venus International Research Awards)
- Best PhD Thesis Award (Runners Up) 2018 (CICT PhD Symposium)
- Gold Medalist - CSE 2006 (NIT Agartala)
Areas of Interest
- Symmetric-Key Crypto
- Quantum Symmetric-Key Cryptanalysis (Recent)
- Lightweight Cryptography
- Cryptanalysis of Hash functions, Authenticated / Block Ciphers
- Fault Analysis Attacks
- Lattice Based Cryptography
Qualification/Experience
- BE (CSE - Gold Medalist) - NIT Agartala
- MS (CSE) - IIT Kharagpur
- PhD (CSE) - IIT Kharagpur
- Post-Doc - Visiting Scientist - ISI Kolkata
Publications
More Information
Projects
On-going
- FinTeQ: Quantum safe financial transaction framework.
Funded by MeitY (INR 62.35 Lakhs) - SERB MATRICS: Symmetric Cryptanalysis Via Higher Order Vectorial
Derivatives.
Funded by SERB (INR 6.6 Lakhs) - DASH: Digital Cash Solutions Based on CBDC.
Funded by IBITF (INR 299.9 Lakhs) - Next Generation Wireless: Next Generation Wireless Research and Standardization
on 5G and Beyond.
Funded by MeitY (INR 42 Lakhs) - Testing and Certifying MISCOS: Testing and Certifying MISCOS developed by CDAC
for two chips.
Funded by BEL (INR 42.37 Lakhs) - Lightweight Crypto: Investigating Novel Lightweight Cryptographic Primitives in
the Quantum era.
Funded by DST (INR 4.9 Lakhs) - Hide and Seek: Searchable Encryption for Financial Databases.
Funded by IBITF (INR 25.01 Lakhs) - Post-Quantum TLS ASIC: Development of tamper-proof SCA/FI resistant 10 Gbps
post-quantum in-line IP network encryptor.
Funded by DST (INR 202.36 Lakhs)
Completed
- 5G Security: Building an end-to-end 5G Test Bed.
Funded by DoT (INR 26.81 Lakhs) - Building Trust: Building Trust on computing platform and training of secure
coding of security chips.
Funded by MeitY (INR 36.50 Lakhs)
Patents
- User Identity Protection in Wireless Networks
Patent No: 573472 (Granted: November 10, 2025) - SUPI Privacy Management in NPN Scenarios
Patent No: 559550 (Granted: February 04, 2025) - User Privacy in Mobile Metaverse Services
Patent No: 565916 (Granted: May 02, 2025)
Teaching
"If you want to master something, teach it." - Richard Feynman
- Operating Systems: Spring 2025, Autumn 2023, Autumn 2020, Autumn 2019
- Lightweight Cryptography: Spring 2025, Autumn 2023, Autumn 2021, Autumn 2020
- Quantum Computing for Computer Scientists: Autumn 2025, Autumn 2024
- Nand to Tetris: Spring 2024
- Cryptography: Spring 2024, Spring 2023, Spring 2022, Spring 2021, Spring 2020, Spring 2019, Spring 2018
- Software Tools and Technologies Lab - 2: Spring 2023, Autumn 2023, Autumn 2022, Spring 2020, Spring 2019
- Cyber-Physical Systems: Spring 2022 (IIT Delhi)
- Professional Communication Lab-II (Presentation Skills): Autumn 2022, Autumn 2021, Autumn 2020, Autumn 2019
- Quantum Symmetric-Key Cryptanalysis: Autumn 2022
- Software Tools and Technologies Lab - 1: Spring 2021, Autumn 2019, Spring 2018
- Research Methodology: Spring 2019, Spring 2018
Current Students
- Ajay Kumar Das (PhD)
Research: Investigating Automated Cryptanalysis of Symmetric-Key Primitives - Dilip Kumar Sau (PhD, IIT Kharagpur)
Research: Design and Analysis of Symmetric Ciphers for Securing Data in Storage
Co-supervised by Prof. Dipanwita Roy Chowdhury - Anup Kumar Kundu (PhD, ISI Kolkata)
Research: Exploiting Classical Cryptanalysis Techniques with Fault Attacks
Co-supervised by Prof. Goutam Paul - Vipin Kumar (PhD)
Research: Lattice in Symmetric and Asymmetric-key Cryptography (Tentative) - Manish Sahu (PhD Visvesvaraya Scholar)
Research: Quantum Resource Estimation for Lightweight Ciphers (Tentative)
Co-supervised by Prof. Santosh Biswas - Bhavesh Kumar (PhD DST Inspire Scholar)
Research: Distinguishing Attacks on ARX/And-RX Ciphers (Tentative) - Riya Jana (PhD)
Research: Cryptanalysis
Project Personnel
- Dr. K Sowjanya (Post-Doc)
Project: 5G Security and Standardization - Madhurima Das (Project Scientist)
Project: 5G Security and Standardization - Vipin Kumar (Project Associate)
Project: Searchable Encryption - Soumen Jana (Project Associate)
Project: FinTeQ
Past Project Personnel
- Mostafizar Rahmar (Post-Doc)
Project: Secure Dongle
Now at: Post-Doc, University of Hyogo, Japan - Dr. Pabitra Pal (Post-Doc)
Project: 5G Security
Now at: Assistant Prof., MAKAUT - Anindya Ganguly (Project Associate)
Project: ECC Standardization
Now at: PhD, IIT Kanpur - Satanu Maity (Project Assistant)
Project: Secure USB
Now at: PhD, IIIT Guwahati - Darunjeet Bag (Project Associate - I)
Project: Secure Dongle - Aman Verma (Project Assistant)
Project: Secure USB
Graduated Students
- Sahiba Suryawanshi (PhD TCS Research Scholar)
Thesis: Cryptanalysis of Symmetric-Key Primitives - Ratnesh Srivastava (MTech)
Thesis: The Decaying Symmetry: Investigating Partial Symmetry in Systems - Chayan Pathak (MTech)
Thesis: Injecting Chaos: Fault Attack Setup and Analysis via ChipWhisperer - Prathamesh Ram (Dual Degree)
Thesis: BRAVO: BoomeRang And Its Various Orientations - Vemuganti Sesha Satvik (BTech Hons.)
Thesis: A Tale of Two Princes: Accelerating Weak Key Detection in X509 Certificates
Now at: PhD, UBC - Ananya (BTech Hons. 2024)
Thesis: Advancing Autonomous Agents: Harnessing Large Language Models for Tool Manipulation, Knowledge Graph Building, and Jailbreaking
Co-supervised by Dr. Subhajit Sidhanta
Now at: PhD, MIT - Ruchit Prakash (Dual Degree 2024)
Thesis: Security Analysis of Instant Payment Systems
Co-supervised by Dr. Souradyuti Paul - Phool Roshan Jha (MTech 2024)
Thesis: Security Analysis of Secure Dongle
Co-supervised by Prof. Santosh Biswas
Now at: PhD, IIT Bombay - Souvik Pan (MTech 2022)
Thesis: Security Analysis of the Portable Document Format
Now at: Scientist-B, CDOT, Delhi - Anup Kumar Kundu (MTech, ISI Kolkata)
Thesis: Fault Analysis of the Prince Family of Lightweight Ciphers
Co-supervised by Prof. Goutam Paul
Now at: PhD, ISI Kolkata - Asim Manna (MTech, ISI Kolkata)
Thesis: Investigating Applications of The Target Difference Algorithm in Keccak & Ascon
Co-supervised by Prof. Goutam Paul
Now at: PhD, IIT Kharagpur - Dilip Kumar Sau (MTech, ISI Kolkata)
Thesis: Efficient Implementation of a class of 6x6 S-Boxes
Co-supervised by Prof. Goutam Paul
Now at: PhD, IIT Kharagpur - Tufan Singha Mahapatra (MTech, ISI Kolkata)
Thesis: Automated Cryptanalysis of Hash Functions
Co-supervised by Prof. Goutam Paul - Aikata (Btech Hons 2020)
Thesis: Fault Based Cryptanalysis of Lightweight Block Ciphers
Now at: PhD, TU Graz - Satyam Sachan (BTech 2021)
Thesis: Cryptanalysis of SHA3
Now at: MS, Purdue - Banashri Karmakar (MTech 2020)
Thesis: Design and Analysis of Lightweight Cryptography
Now at: Phd, IISc Bangalore - Ahaan Dabholkar (BTech 2020)
Thesis: Web Security
Now at: MS - PhD, Purdue - Harshvardhan Patel (BTech 2020)
Thesis: System Security
Now at: Atonarp Micro-Systems - Bharath v. Gottumukkala (BTech 2020)
Now at: Business Technology Analyst, Deloitte
Visitors
- Dr. Sujoy Sinha Roy (Associate Professor, TU Graz)
- Shibam Ghosh (Doctoral Sudent, University of Haifa, Israel)
- Mostafizar Rahmar (Doctoral Student, ISI Kolkata)
- Avishek Majumdar (Faculty Member, UPES, Dehradun)
- Soumen Debnath (Philips Healthcare)
- Anubhab Bakshi (PhD, NTU Sigapore)
Interns
- Isha Goel
- Anurupa Tirkey (MSc, Centre for Basic Sciences, PRSU, Raipur)
- Aastha Chauhan (BTech, IET Lucknow)
- Siddhartha (MAKAUT)
- Soumen (MAKAUT)
- Arup (Kalyani University)
- Biswarupa Murmu (MAKAUT)