Somindu Chaya Ramanna

Assistant Professor
Department of Computer Science and Engineering
Indian Institute of Technology, Kharagpur
West Bengal 721302.

Email: somindu AT cse DOT iitkgp DOT ernet DOT in

I have done my Ph.D. under the supervision of Prof. Palash Sarkar at the Applied Statistics Unit of Indian Statistical Institute, Kolkata. From February 2015 to November 2016, I was a post-doctoral researcher in the AriC team of LIP laboratory at ENS de Lyon hosted by Dr. Benoît Libert. I spent one semester at the School of Electrical Sciences, IIT Bhubaneswar as an assistant professor (on contract). Currently, I am an assistant professor in the Department of Computer Science and Engineering at IIT Kharagpur. Here is my Curriculum Vitae.

Teaching

• Present: Autumn 2024
  • CS60025 Algorithmic Game Theory
  • CS60029 Randomised Algorithm Design (jointly with Dr. Palash Dey)


• Past
  • Foundations of Computing Science (CS60005), Autumn 2023
  • Randomised Algorithm Design (jointly with Dr. Palash Dey) (CS60029), Autumn 2023
  • Computational Number Theory (CS60094), Spring 2023
  • Algorithms Laboratory (CS29003), Spring 2023 (jointly with Dr. Palash Dey)
  • Theory of Computation (CS41001), Autumn 2022 (jointly with Dr. Sudeshna Kolay).
  • Foundations of Computing Science (CS60005), Autumn 2022 (jointly with Dr. Aritra Hazra).
  • Programming and Data Structures (CS10003), Spring 2022
  • Algorithms Laboratory (CS29003), Spring 2022 (jointly with Dr. Palash Dey)
  • Theory of Computation (CS41001), Autumn 2021 (jointly with Dr. Sudeshna Kolay).
  • Foundations of Computing Science (CS60005), Autumn 2021 (jointly with Dr. Aritra Hazra).
  • Computational Number Theory (CS60094), Spring 2021
  • Algorithms Laboratory (CS29003), Spring 2021 (jointly with Dr. Palash Dey)
  • Computational Number Theory (CS60094), Spring 2020
  • Theory of Computation (CS41001), Autumn 2019.
  • Computational Number Theory (CS60094), Spring 2019
  • Foundations of Cryptography (CS60088), Spring 2019
  • Theory of Computation (CS41001), Autumn 2018.
  • Foundations of Cryptography (CS60088), Spring 2018
  • Theory of Computation (CS41001), Autumn 2017 (jointly with Dr. Soumyajit Dey).

For Students

Publications

• Journals

  • Bishnu Charan Behera and Somindu C. Ramanna.
    Unbounded non-zero inner product encryption.
    Theor. Comput. Sci. 1000: 114548 (2024).
  • Somindu C. Ramanna, Palash Sarkar.
    Efficient Adaptively Secure IBBE from the SXDH Assumption (pdf).
    IEEE Trans. Information Theory 62(10): 5709-5726 (2016).
  • Somindu C. Ramanna, Palash Sarkar.
    On Quantifying the Resistance of Concrete Hash Functions to Generic Multicollision Attacks (pdf).
    IEEE Trans. Information Theory 57(7): 4798-4816 (2011).

• Conferences

  • Bishnu Charan Behera and Somindu C. Ramanna.
    Multi-input Functional Encryption for Unbounded Inner Products. (pdf)
    ProvSec 2023, LNCS Volume 14217, pp. 274–289.
  • Sikhar Patranabis, Debdeep Mukhopadhyay and Somindu C. Ramanna.
    Function Private Predicate Encryption for Low Min-Entropy Predicates.
    PKC 2019, LNCS Volume 11443, pp. 189–219.
  • Junqing Gong, Benoît Libert and Somindu C. Ramanna.
    Compact IBBE and Fuzzy IBE from Simple Assumptions.
    SCN 2018, LNCS Volume 11035, pp. 563-582. (available here).
  • Jie Chen, Benoît Libert and Somindu C. Ramanna.
    Non-Zero Inner Product Encryption with Short Ciphertexts and Private Keys (pdf).
    SCN 2016, LNCS Volume 9841, pp. 23-41.
  • Benoît Libert, Somindu C. Ramanna and Moti Yung.
    Functional Commitment Schemes: From Polynomial Commitments to Pairing-Based Accumulators from Simple Assumptions (pdf).
    ICALP 2016, LIPIcs Volume 55, pp. 30:1-30:14.
  • Somindu C. Ramanna.
    More Efficient Constructions for Inner-Product Encryption (pdf).
    ACNS 2016, LNCS Volume 9696, pp. 231-248.
  • Somindu C. Ramanna, Palash Sarkar.
    Efficient (Anonymous) Compact HIBE from Standard Assumptions (pdf).
    ProvSec 2014, LNCS Volume 8782, pp. 243-258.
  • Somindu C. Ramanna, Palash Sarkar.
    Anonymous Constant-Size Ciphertext HIBE from Asymmetric Pairings (pdf).
    IMACC 2013, LNCS Volume 8308, pp. 344-363.
  • Somindu C. Ramanna, Sanjit Chatterjee and Palash Sarkar.
    Variants of Waters' Dual System Primitives Using Asymmetric Pairings (pdf).
    PKC 2012, LNCS Volume 7293, pp. 298-315.

• Reports

  • Somindu C. Ramanna.
    Bounded DFA-Based Functional Encryption with Adaptive Security (pdf).
    IACR Cryptology ePrint Archive 2013:638 (2013).

Ph.D. Thesis