Research Areas

Post-Quantum Cryptography

Developing and analyzing cryptographic algorithms resistant to attacks by quantum computers.

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Zero-Knowledge Proofs

Exploring ZKPs for privacy-preserving applications like voting, identity, and blockchain.

zkBallot Project

Network Security Protocols

Designing and verifying secure communication protocols for current and future networks.

Protocol Research

Research Projects

Our research group focuses on developing practical applications of cryptography and blockchain technology. Here are our key projects:

zkBallot: Privacy-Preserving E-Voting

Zero-Knowledge Proofs E-Voting Privacy

zkBallot is a next-generation e-voting system using zero-knowledge proofs to guarantee voter privacy and verifiable results—no identities or choices are ever revealed.

  • Anonymous voter registration
  • Private, verifiable voting
  • Public, privacy-preserving tally

GoCerts for Energy Domain

Energy Sector Blockchain Sustainability

Creating Guarantee of Origin (GO) Infra in partnership with Ireland's foremost energy company (ESB).

  • Blockchain-based energy certification
  • Renewable energy tracking
  • Industry partnership with ESB

XRPL Post-Quantum Integration

Post-Quantum CRYSTALS-Dilithium XRPL Blockchain Security

Enhancing the XRP Ledger's security against quantum computing threats through the integration of NIST-standardized Post-Quantum Cryptographic algorithms.

Challenge

Current cryptographic algorithms (Secp256k1, Ed25519-donna) are vulnerable to quantum attacks via Shor's and Grover's algorithms.

Solution

Integration of CRYSTALS-Dilithium, a lattice-based PQC algorithm, providing quantum resistance while maintaining backward compatibility.

Implementation Scope

  • XRPL Protocol Modifications
  • Key Management Infrastructure
  • Transaction Validation Process
  • Backward Compatibility
  • Performance Optimization
  • Security Standardization

Publications

Cyber Security on the Edge: Efficient Enabling of Machine Learning on IoT Devices

S. Kumari, V. Tulshyan and H. Tewari, Information, vol. 15, no. 126, February 2024

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Blockchain-Enabled NextGen Service Architecture for Mobile Internet Offload

R. Singh, Z. Pervez and H. Tewari, Future Internet, vol. 15, no. 5, May 2023

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Anonymous Homomorphic IBE with Application to Anonymous Aggregation

M. Clear and H. Tewari, Cryptography, vol. 7, no. 22, April 2023

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Optimized Communication in Sharded Blockchain Networks

J. Rowland and H. Tewari, Future of Information and Communication Conference (FICC), 2023

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Implementation of Privacy-Preserving Identifiers for the Secure Storage of Electronic Health Records on the Ethereum Blockchain

S. Kumari and H. Tewari, ACM DLT Journal, 2025 [Accepted]

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Cyber Security on the Edge: Efficient Enabling of Machine Learning on IoT Devices

S. Kumari, V. Tulshyan and H. Tewari, Information, vol. 15, no. 126, February 2024

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Blockchain-Enabled NextGen Service Architecture for Mobile Internet Offload

R. Singh, Z. Pervez and H. Tewari, Future Internet, vol. 15, no. 5, May 2023

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Anonymous Homomorphic IBE with Application to Anonymous Aggregation

M. Clear and H. Tewari, Cryptography, vol. 7, no. 22, April 2023

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Blockchain-Enabled Chebyshev Polynomial-Based Group Authentication for Secure Communication in an Internet of Things Network

R. Singh, S. Sturley and H. Tewari, Future Internet, vol. 15, no. 3, February 2023

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A post-quantum lattice based lightweight authentication and code-based hybrid encryption scheme for IoT devices

S. Kumari, M. Singh, R. Singh and H. Tewari, Computer Networks, vol. 127, August 2022

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Multiverse of HawkNess: A Universally-Composable MPC-based Hawk Variant

A. Banerjee and H. Tewari, Cryptography, vol. 6, no. 3, August 2022

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Signature based Merkle Hash Multiplication algorithm to secure the communication in IoT devices

S. Kumari, M. Singh, R. Singh and H. Tewari, Knowledge-Based Systems, July 2022

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Post‐quantum cryptography techniques for secure communication in resource‐constrained Internet of Things devices: A comprehensive survey

S. Kumari, M. Singh, R. Singh and H. Tewari, Journal of Software: Practice and Experience, July 2022

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To Secure the Communication in Powerful Internet of Things Using Innovative Post Quantum Cryptographic Method

S. Kumari, M. Singh, R. Singh and H. Tewari, Arabian Journal for Science and Engineering, vol. 47, no. 2, October 2021

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DBNS: A Distributed Blockchain-Enabled Network Slicing Framework for 5G Networks

M. Togou, T. Bi, K. Dev, K. McDonnell, A. Milenovic, H. Tewari and G. Muntean, IEEE Communications Magazine, vol. 58, no. 11, November 2020

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Blockchain Research Beyond Cryptocurrencies

H. Tewari, IEEE Communications Standards Magazine, vol. 3, no. 4, December 2019

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The Future of E-Voting

P. Tarasov and H. Tewari, IADIS International Journal on Computer Science and Information Systems, vol. 12, no. 2, December 2017

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Real-Time Payments for Mobile IP

H. Tewari and D. O'Mahony, IEEE Communications Magazine, vol. 41, no. 2, February 2003

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Optimized Communication in Sharded Blockchain Networks

J. Rowland and H. Tewari, Future of Information and Communication Conference (FICC), San Francisco, USA, March 2-3, 2023

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CoviChain: A Blockchain Based COVID-19 Vaccination Passport

P. Bradish, S. Chaudhari, M. Clear and H. Tewari, Future of Information and Communication Conference (FICC), San Francisco, USA, March 2-3, 2023

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A Lightweight Encryption Scheme for IoT Devices in the Fog

M. Chun, S. Weber and H. Tewari, Future Technologies Conference (FTC), Vancouver, Canada, 20-21 October, 2022

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Blockchain-Enabled End-to-End Encryption for Instant Messaging Applications

R. Singh, A. Chauhan and H. Tewari, 2022 IEEE 23rd International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM), 2022

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zkHawk: Practical Private Smart Contracts from MPC-based Hawk

A. Banerjee, M. Clear and H. Tewari, 3rd Conference on Blockchain Research & Applications for Innovative Networks and Services (BRAINS), 2021

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Framework for a DLT Based COVID-19 Passport

S. Chaudhari, M. Clear, P. Bradish and H. Tewari, Computing Conference, London, UK, 15-16 July, 2021 (Best Student Paper Award)

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Framework for a Decentralized Web

R. Singh, A. Donegan and H. Tewari, International Telecommunication Networks and Application Conference (ITNAC), 2020

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Demystifying the Role of zk-SNARKs in Zcash

A. Banerjee, M. Clear and H. Tewari, IEEE Conference on Applications, Information and Network Security (AINS), 2020 (Best Paper Award)

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A Distributed Blockchain-based Broker for Efficient Resource Provisioning in 5G Networks

M. Togou, T. Bi, K. Dev, K. McDonnell, A. Milenovic, H. Tewari, and G. Muntean, International Wireless Communications and Mobile Computing Conference (IWCMC), 2020

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An Efficient Peer-to-Peer Bitcoin Protocol with Probabilistic Flooding

H. Vu and H. Tewari, Emerging Technologies in Computing (iCETiC), 2019

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Electronic Payment Systems for E-Commerce

D. O'Mahony, M. Peirce and H. Tewari, 2nd Edition, Artech House Publishers, Boston/London, 2001, pp. 345

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Electronic Payment Systems

D. O'Mahony, M. Peirce and H. Tewari, Artech House Publishers, Boston/London, 1997, pp. 254

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Efficient Quantum-Resistant Identity Based Cryptography

M. Clear, The Undergraduate Journal of Ireland & Northern Ireland, Dublin, 2011, pp. 93-153 (Best Undergraduate Project 2011 - Supervisor H. Tewari)

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Non-Peer Reviewed Articles

Can crypto take off as the solution to in-flight fraud?

Silicon Republic, September 5, 2024

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The question for DeFi in 2024 is whether you can bank on crypto

Sunday Business Post, January 27, 2024

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The Wild West of finance': CBDCs, crypto and privacy in a digital age

Silicon Republic, January 19, 2023

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The future of blockchain: Why decentralisation is here to stay

Silicon Republic, October 18, 2022

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Trinity research proposes a way to decarbonise cryptocurrencies

Silicon Republic, March 17, 2022

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Patent Applications

System and Apparatus for Securely Storing Data

H. Tewari et al., UK Patent Serial No. 1117275.6, October 8, 2011 (Project Title – CipherDocs/CipherApps)

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An Authorization Method and System for Wireless Networks using Subscriber Identity Module Based Information

H. Tewari et al., UK Patent Serial No. RL/LJR/31947/GBP, November 12, 2010 (Project Title - Suura)

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Meet the Team

Prof. Hitesh Tewari

Prof. Hitesh Tewari

Principal Investigator

Dr. Vaibhav Agarwal

Dr. Vaibhav Agarwal

Postdoctoral Researcher

Atharva Lele

Atharva Lele

Research Assistant

Harsha Vardhan Gajendra Kumar

Harsha Vardhan

Research Assistant

Aniket Kumar

Aniket Kumar

Research Assistant

Get In Touch

We welcome collaboration inquiries, questions about our research, and prospective students.

Email: [email protected]

Address: School of Computer Science and Statistics, Trinity College Dublin, Dublin 2, Ireland

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