The research program in the Cryptography and Security group at IAI TCG-CREST focuses on the theoretical as well as the applied aspect of Cryptology and Security research. The long-term objective of the group is to carry out top-notch academic and industrial research in the field of theoretical and applied Cryptography and Security and to bring out the future generation leading crypto experts by the means of providing rigorous training in the field. Alongside, the plan is to carry out successful collaboration with industries and government agencies for innovation and international accolades. The group mostly, but is not restricted to, works in the following areas of specialization in Cryptology and Security.

  • Light-Weight Cryptography
  • Provable Security of Symmetric Key Cryptography
  • Design and Analysis of Authenticated Ciphers
  • Beyond Birthday Bound Security of Symmetric key cryptographic primitives
  • Symmetric key Cryptanalysis
  • Symmetric Searchable Encryption
  • Secure Cloud Computing
  • Blockchain Technology
  • Quantum Cryptography and Quantum Computation
  • Lattice based Cryptography
  • Post-Quantum Cryptography
  • White-Box Cryptography

We are expecting to include more topics in the future pertinent to the cryptography and security area depending upon the requirement and global innovations. In particular, we are aiming to contribute to the area of network security.

Recent Highlights

  • We have publications at IACR CRYPTO 2024 (Co-authored by Avijit Dutta), Journal of Cryptology 2024 (Co-authored by Nilanjan Datta), IACR  Transaction on Symmetric Cryptology 2024 (Co-authored by Sougata Mandal).

  • TCG CREST Cryptology group will organize ASIACRYPT 2024, one of the flagship Conferences on Cryptology.

  • TCG CREST Cryptology group will organize and host ASK 202411th Asian Workshop on Symmetric Key Cryptography. 

  • Avik Chakraborti and Avijit Dutta have been added to the program committee of Asiacrypt 2024.


Cryptology and Quantum Group

The members of the group are listed below.

The following students are working on the Cryptology and Security group.



International Conferences and Workshops Organized

Cryptographic Conferences:

  • ASIACRYPT 2024: TCG CREST will organize Asicrypt 2024.

  • ASK 2024: TCG CREST will organize and host Asian-Workshop on Symmetric Key Cryptography 2024. 

  • INDOCRYPT 2022: We have organized Indocrypt 2022, a part of the Indocrypt series organized under the aegis of the Cryptology Research Society of India. Indocrypt conference targets researchers and academicians in the areas, which include but are not limited to foundations, new cryptographic primitive proposals, cryptanalysis, security models, cryptographic protocols, quantum/post-quantum cryptography, etc.

Cryptographic Workshops Organized:


Professional Activities

  • Dr. Nilanjan Datta and Dr. Avik Chakraborti have been selected as the assistant secretary of Cryptology Research Society of India.
  • Dr Arpita Maitra is working as a PI in two classified projects related to Quantum Random Number Generation, Quantum Key Distribution and Quantum Cryptanalysis on Symmetric Ciphers.

  • Prof. Rana Barua, Dr. Nilanjan Datta and Dr. Avijit Dutta are working on a private project on “Attribute Based Encryption”.

  • Dr. Avijit Dutta is selected in the Editorial Board of IACR Transactions on Symmetric key Cryptology (ToSC 2022/2023 and 2023/2024).

  • Dr. Nilanjan Datta is one of Organizing co-chair of INDOCRYPT 2022.

  • Dr. Nilanjan Datta, Avijit Dutta and Arpita Maitra are added in the Program Committee of INDOCRYPT 2022.


Recent Publications

Here is a list of important publications from our group. 

  • R. Bhaumik, B. Chakraborty, W. Choi, Avijit Dutta,  J. Govinden, Y. Shen: The Committing Security of MACs with Applications to Generic  Composition. IACR CRYPTO 2024.

  • C. Dhar, J. Ethan, R. Jejurikar, M. Khairallah, E. List, Sougata Mandal: Context Committing Security of Levelled Leakage-Resilient AEAD. IACR  Transaction on Symmetric Cryptology (ToSC 2024).

  • E. Andreeva, A. Bogdanov, Nilanjan Datta, A. Luykx, B. Mennink, M. Nandi, E. Tischhauser, K. Yasuda: The COLM Authenticated Encryption Scheme. Journal of Cryptology, 2024 (doi: 10.1007/s00145-024-09492-8).

  • Nilanjan Datta, Shreya Dey, Avijit Dutta, Sougata Mandal: Cascading Four Round LRW1 is Beyond Birthday Bound Secure. IACR Transactions of Symmetric Cryptology (ToSC) 2023.

  • B. Cogliati, Avijit Dutta, M. Nandi, J. Patarin, A. Saha: Proof of Mirror Theory for a Wide Range of \xi_max. Eurocrypt 2023. 

  • Nilanjan Datta, Avijit Dutta, M. Nandi, S. Talnikar: Tight Multi-user Security of DbHtS. Transactions on Symmetric Cryptology,  2023 (1), 192–223. Doi: https://doi.org/10.46586/tosc.v2023.i1.192-223

  • N. Datta, A. Dutta, E. List, S. Mandal: On the Security of Triplex- and Multiplex-type Constructions with Smaller Tweaks. INDOCRYPT 2023.

  • N. Datta, A. Dutta, S. Kundu: Tight Security Bound of 2k-LightMAC Plus. INDOCRYPT 2023.

  • B. Chakraborty, N. Datta, M. Nandi: Designing Full-Rate Sponge based AEAD Modes. INDOCRYPT 2023.

  • S. S. Chaudhury, A. Samanta, A. Maitra: Quantum Attribute-based Encryption – A Comprehensive Study. Quantum Information Processing 2023.

  • N. Datta, A. Dutta, C. Mancilias Lopez: LightMAC: Fork it and make it faster. Advances in Mathematics of Communications 2023.

  • A. Bhattacharjee, R. Bhaumik, A. Dutta, M. Nandi, A. Ray Chaudhuri: BBB Security for 5-Round Even-Mansour-Based Key-Alternating Feistel Ciphers. Design Codes and Cryptography, 2023.

  • A. Bhattacharjee, R. Bhaumik, A. Dutta, E. List: Beyond Birthday Bound Secure Permutation Based AE in Faulty Nonce Model. ICICS’23.
  • A. Dutta, M. Nandi, S. Talnikar: Tight Security Analysis of the Public Permutation-Based PMAC Plus. Advances in Mathematics of Communications 2023.

  • L. Sardar,  B. Sengupta, S. Ruj: Efficient Keyword Search on Encrypted Dynamic Cloud Data. American Institute of Mathematical Sciences 2023. Doi: 10.3934/amc.2022101

  • N. Datta, A. Dutta, S. Ghosh: INT-RUP Security of SAEB and TinyJAMBU. INDOCRYPT 2022.

  • S. S. Chaudhury, S. Dutta: Quantum Multi-Secret Sharing via Trap Codes and Discrete Quantum Walks. Quantum Information Processing (2022).

  • A. Bhattacharjee, A. Chakraborti, N. Datta, C. Mancillas-López, M. Nandi: ISAP+: ISAP with Fast Authentication. INDOCRYPT 2022.

  • J. Basak, K. Chakraborty, A. Maitra, S. Maitra: A Proposal for Device Independent Probabilistic Quantum Oblivious Transfer. INDOCRYPT 2022.

  • B. Chatterjee, R. Parikh, A. Maitra, S. Maitra, A. Roy: Revisiting BoolTest – On Randomness testing using Boolean functions. INDOCRYPT 2022.

  • A. Dutta, M. Nandi, A. Saha: Proof of Mirror Theory for \xi_max=2IEEE Transactions of Information Theory 2022.

  • A. Bhattacharjee, A. Dutta, E. List, M. Nandi: CENCPP* – Beyond-birthday-secure Encryption from Public PermutationsDesign Codes and Cryptography 2022.

  • N. Datta, A. Dutta, K. Dutta: Improved Security Bound of (E/D)WCDM, IACR Transactions on Symmetric Cryptology 2021 (4): 138 – 176. [Link]

  • T. SAPV, D. Bera, A. Maitra, S. Maitra: Quantum Algorithms for Cryptographically Significant Boolean Functions, Springer Briefs in Computer Science, Springer, 2021, ISSN 2191-5768, ISBN 978-981-16-3060-6. [Link]

  • A. Dutta, M. Nandi, S. Talnikar: Permutation Based EDM: An Inverse Free BBB Secure PRF. IACR Trans. Symmetric Cryptol. 2021(2): 31-70 (2021).

  • A. Chakraborti, N. Datta, A.Jha, C.M. Lopez, M. Nandi: tHyENA: Making HyENA Even Smaller. INDOCRYPT 2021: 26 – 48. [Link]

  • A. Chakraborti, N. Datta, A.Jha, C.M. Lopez, M. Nandi, Y. Sasaki: Elastic-Tweak: A Framework for Short Tweak Tweakable Block Cipher. INDOCRYPT 2021: 114 – 137. [Link]
  • A. Dutta: Minimizing the Two-Round Tweakable Even-Mansour Cipher. ASIACRYPT (1) 2020: 601-629