Sikhar Patranabis

Staff Research Scientist

Research Areas: Cryptography and Security

Visa Researcher Sikhar Patranabis.

Biography

Dr. Sikhar Patranabis joined Visa Research as a Staff Research Scientist in November 2020. Sikhar received his Ph.D. in Computer Science from IIT Kharagpur, India in 2019. Prior to joining Visa Research, Sikhar was a postdoctoral researcher in the Applied Cryptography group at the Swiss Federal Institute of Technology (ETH) Zurich, Switzerland.

As a member of the Security team, Sikhar’s research interests span all aspects of cryptography and security, with special focus on cryptographic foundations, database encryption, and the design and implementation of real-world cryptographic protocols. He has published research papers in several international conferences and journals including the International Association for Cryptologic Research (IACR) Crypto, IACR Eurocrypt, IACR Asiacrypt, Association for Computing Machinery (ACM) Conference on Computer and Communications Security (CCS), Network and Distributed System Security Symposium (NDSS), ACM/IEEE Design Automation Conference (DAC), and ACM Special Interest Group on Knowledge Discovery and Data Mining (SIGKDD).

Sikhar’s research works have received nearly 400 citations. He is the recipient of the IBM Ph.D. Fellowship award (2016 and 2017) and the Qualcomm Research Innovation Fellowship award (2017).

Selected peer-reviewed publications

  • Forward and Backward Private Conjunctive Searchable Symmetric Encryption. Sikhar Patranabis, Debdeep Mukhopadhyay. In NDSS 2021 (To Appear).
  • Cryptographic Group Actions and Applications. Navid Alamati, Luca De Feo, Hart Montgomery, Sikhar Patranabis. In IACR ASIACRYPT 2020 (To Appear).
  • Fault Template Attacks on Block Ciphers Exploiting Fault Propagation. Sayandeep Saha, Arnab Bag, Debapriya Basu Roy, Sikhar Patranabis, Debdeep Mukhopadhyay. In IACR EUROCRYPT 2020.
  • Symmetric Primitives with Structured Secrets. Navid Alamati, Hart Montgomery, Sikhar Patranabis. In IACR CRYPTO 2019.
  • Minicrypt Primitives with Algebraic Structure and Applications. Navid Alamati, Hart Montgomery, Sikhar Patranabis, Arnab Roy. In IACR EUROCRYPT 2019.
  • ALAFA: Automatic Leakage Assessment for Fault Attack Countermeasures. Sayandeep Saha, Nishok Kumar Sundaressan, Sikhar Patranabis, Debdeep Mukhopadhyay, Pallab Das Gupta. In IEEE/ACM DAC 2019.
  • Lightweight and Side-channel Secure 4 × 4 S-Boxes from Cellular Automata Rules. Ashrujit Ghoshal, Rajat Sadhukhan, Sikhar Patranabis, Nilanjan Datta, Stjepan Picek, Debdeep Mukhopadhyay. In IACR FSE 2019.
  • Function Private Predicate Encryption for Low Min-Entropy Predicates. Sikhar Patranabis, Debdeep Mukhopadhyay, Somindu C. Ramanna. In IACR PKC 2019.
  • Result Pattern Hiding Searchable Encryption for Conjunctive Queries. Shangqi Lai, Sikhar Patranabis, Amin Sakzad, Joseph Liu, Debdeep Mukhopadhyay, Ron Steinfeld, Shifeng Sun, Dongxi Liu, Cong Zuo. In ACM CCS 2018.
  • Hardware Acceleration of Searchable Encryption. Arnab Bag, Sikhar Patranabis, L. Tribuvan, Debdeep Mukhopadhyay. In ACM CCS 2018.
  • Efficient Secure k-Nearest Neighbours over Encrypted Data. Manish Kesarwani, Akshar Kaul, Prasad Naldurg, Sikhar Patranabis, Gagandeep Singh, Sameep Mehta, Debdeep Mukhopadhyay. In EDBT 2018.
  • Provably Secure Key-Aggregate Cryptosystems with Broadcast Aggregate Keys for Online Data Sharing on the Cloud. Sikhar Patranabis, Yash Shrivastava, Debdeep Mukhopadhyay. In IEEE Transactions on Computers, 2017.
  • On the Formation of Circles in Co-authorship Networks. Tanmoy Chakraborty, Sikhar Patranabis, Pawan Goyal, Animesh Mukherjee. In ACM SIGKDD 2015.