Publications

Publications can be found on Google-Scholar or DBLP but the list below is most up-to-date.

2023

• White-box Cryptography with Global Device Binding from Message-Recoverable Signatures and Token-Based Obfuscation [Eprint]
  Shashank Agrawal, Estuardo Alpirez Bock, Yilei Chen, Gaven Watson
  To appear in Constructive Side-Channel Analysis and Secure Design (COSADE 2023)

2022

• ParaDiSE: Efficient Threshold Authenticated Encryption in Fully Malicious Model
  Shashank Agrawal, Wei Dai, Atul Luykx, Pratyay Mukherjee, Peter Rindal
  In Progress in Cryptology – INDOCRYPT 2022 [Proceedings][Eprint]
• Secure Plot Transfer for the Chia Blockchain [Eprint]
  Shashank Agrawal
• CoRA: Collaborative Risk-Aware Authentication [Eprint]
  Mastooreh Salajegheh, Shashank Agrawal, Maliheh Shirvanian, Mihai Christodorescu, Payman Mohassel

2021

• 2D-2FA: A New Dimension in Two-Factor Authentication
  Maliheh Shirvanian, Shashank Agrawal
  In Annual Computer Security Applications Conference (ACSAC 2021) [Proceedings][arXiv]
• BETA: Biometric Enabled Threshold Authentication
  Shashank Agrawal, Saikrishna Badrinarayanan, Payman Mohassel, Pratyay Mukherjee, and Sikhar Patranabis
  In Public Key Cryptography (PKC 2021) [Proceedings][Eprint]

2020

• KVaC: Key-Value Commitments for Blockchains and Beyond
  Shashank Agrawal, Srinivasan Raghuraman
  In Advances in Cryptology – Asiacrypt 2020 [Proceedings][Eprint]
• Game-Set-MATCH: Using Mobile Devices for Seamless External-Facing Biometric Matching
  Shashank Agrawal, Saikrishna Badrinarayanan, Pratyay Mukherjee, and Peter Rindal
  In ACM Conference on Computer & Communications Security (CCS 2020) [Proceedings] [Eprint]
• Zether: Towards Privacy in a Smart Contract World
  Benedikt Bünz, Shashank Agrawal, Mahdi Zamani, and Dan Boneh
  In Financial Cryptography and Data Security (FC 2020) [Proceedings] [Eprint]
  ★ Also presented at Privacy ENhancing Cryptography In Ledgers Workshop (PENCIL) and ZKProof Workshop (ZKP 2019) [Video (Benedikt)]
  ★ Covered widely: Blockonomi, Newconomy, Cointelegraph, Coindesk
  ★ Implemented in the Consensys Quorum blockchain

2018

• Impossibility of Simulation Secure Functional Encryption Even with Random Oracles
  Shashank Agrawal, Venkata Koppula, and Brent Waters
  In Theory of Cryptography (TCC 2018) [Proceedings][Eprint]
• PASTA: PASsword-based Threshold Authentication
  Shashank Agrawal, Peihan Miao, Payman Mohassel, and Pratyay Mukherjee
  In ACM Conference on Computer & Communications Security (CCS 2018) [Proceedings][Video (Peihan)][Eprint]
• DiSE: Distributed Symmetric-key Encryption
  Shashank Agrawal, Payman Mohassel, Pratyay Mukherjee, and Peter Rindal
  In ACM Conference on Computer & Communications Security (CCS 2018) [Proceedings][Video (Peter)][Eprint]
  ★ Selected to NIST Threshold Cryptography Workshop (NTCW 2019) [Video]
  ★ Selected to Real World Crypto (RWC 2020) [Video (Gaven)]
  ★ Available as open-source software under Apache 2.0 here
• Non-Interactive Zero-Knowledge Proofs for Composite Statements
  Shashank Agrawal, Chaya Ganesh, and Payman Mohassel
  In Advances in Cryptology – CRYPTO 2018 [Proceedings][Video (Chaya)][Eprint]

2017

• FAME: Fast Attribute-based Message Encryption
  Shashank Agrawal and Melissa Chase
  In ACM Conference on Computer & Communications Security (CCS 2017) [Proceedings][Presentation][Eprint]
  ★ FAME’s CP-ABE scheme, along with several others, are available under the MIT license here
  ★ Recommended by European Telecommunications Standards Institute for secure access control
• Simplifying Design and Analysis of Complex Predicate Encryption Schemes
  Shashank Agrawal and Melissa Chase
  In Advances in Cryptology – EUROCRYPT 2017 [Proceedings][Video][Eprint]
• Functional Encryption: Deterministic to Randomized Functions from Simple Assumptions
  Shashank Agrawal and David J. Wu
  In Advances in Cryptology – EUROCRYPT 2017 [Proceedings][Video (David)][Eprint]

2016

• Virtual Grey-Boxes Beyond Obfuscation: A Statistical Security Notion for Cryptographic Agents
  Shashank Agrawal, Manoj Prabhakaran, and Ching-Hua Yu
  In Theory of Cryptography (TCC 2016-B) [Proceedings][Eprint]
• A Study of Pair Encodings: Predicate Encryption in Prime Order Groups
  Shashank Agrawal and Melissa Chase
  In Theory of Cryptography (TCC 2016-A) [Proceedings][PPT][Video][Eprint]
• Optimal Computational Split-state Non-malleable Codes
  Divesh Aggarwal, Shashank Agrawal, Divya Gupta, Hemanta K. Maji, Omkant Pandey, and Manoj Prabhakaran
  In Theory of Cryptography (TCC 2016-A) [Proceedings][PPT][Video][Eprint]

2015

• Explicit Non-malleable Codes Against Bit-Wise Tampering and Permutations
  Shashank Agrawal, Divya Gupta, Hemanta K. Maji, Omkant Pandey, and Manoj Prabhakaran
  In Advances in Cryptology – CRYPTO 2015 [Proceedings][Video][Eprint]
  Subsumes an earlier version posted on Eprint and ECCC.
• Cryptographic Agents: Towards a Unified Theory of Computing on Encrypted Data
  Shashank Agrawal, Shweta Agrawal, and Manoj Prabhakaran
  In Advances in Cryptology – EUROCRYPT 2015 [Proceedings][Eprint]
• On the Practical Security of Inner Product Functional Encryption
  Shashank Agrawal, Shweta Agrawal, Saikrishna Badrinarayanan, Abishek Kumarasubramanian, Manoj Prabhakaran, and Amit Sahai
  In Public Key Cryptography (PKC 2015) [Proceedings][PPT][Eprint]
  The eprint version has several results not mentioned in the proceedings version.
• A Rate-Optimizing Compiler for Non-malleable Codes Against Bit-Wise Tampering and Permutations
  Shashank Agrawal, Divya Gupta, Hemanta K. Maji, Omkant Pandey, and Manoj Prabhakaran
  In Theory of Cryptography (TCC 2015) [Proceedings][PPT][Eprint]

2014

• Controlled Functional Encryption
  Muhammad Naveed, Shashank Agrawal, Manoj Prabhakaran, XiaoFeng Wang, Erman Ayday, Jean-Pierre Hubaux, and Carl A. Gunter
  In ACM Conference on Computer & Communications Security (CCS 2014) [Proceedings][Code]
• Lower Bounds in the Hardware Token Model
  Shashank Agrawal, Prabhanjan Ananth, Vipul Goyal, Manoj Prabhakaran, and Alon Rosen
  In Theory of Cryptography (TCC 2014) [Proceedings][Video][Eprint]

2013

• On Fair Exchange, Fair Coins and Fair Sampling
  Shashank Agrawal and Manoj Prabhakaran
  In Advances in Cryptology – CRYPTO 2013 [Proceedings][PPT][Video][Eprint]

2012

• Verifiable secret sharing in a total of three rounds
  Shashank Agrawal
  In Information Processing Letters 2012 [Proceedings]
• Interplay between (Im)perfectness, Synchrony and Connectivity: The Case of Reliable Message Transmission
  Abhinav Mehta, Shashank Agrawal, and Kannan Srinathan
  In Distributed Computing and Networking (ICDCN 2012) [Proceedings][Journal]
  ★ Invited to a special issue of Theoretical Computer Science journal

2011

• Secure Message Transmission in Asynchronous Directed Graphs
  Shashank Agrawal, Abhinav Mehta, and Kannan Srinathan
  In Progress in Cryptology – INDOCRYPT 2011 [Proceedings]
• Minimal Connectivity for Unconditionally Secure Message Transmission in Synchronous Directed Networks
  Manan Nayak, Shashank Agrawal, and Kannan Srinathan
  In Information Theoretic Security (ICITS 2011) [Proceedings][Eprint]

2010

• Brief Announcement: Synchronous Las Vegas URMT Iff Asynchronous Monte Carlo URMT
  Abhinav Mehta, Shashank Agrawal, and Kannan Srinathan
  In Distributed Computing (DISC 2010) [Proceedings]
  Subsumed by the ICDCN 2012 paper above