Mahesh Sreekumar Rajasree

CISPA Helmholtz Center for Information Security, Sankt Ingbert, Germany

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I am currently a Post-Doctoral Researcher at CISPA Helmholtz Center for Information Security, hosted by Prof. Nico Döttling. My research focuses on public-key cryptography and quantum cryptography.

Previously, I was a Post-Doctoral Fellow in the Department of Computer Science and Engineering, Indian Institute of Technology Delhi, where I worked under the guidance of Prof. Venkata Koppula.

I completed my PhD and MTech degree under the guidance of Prof. Manindra Agrawal in the Department of Computer Science and Engineering, Indian Institute of Technology, Kanpur. During that time, I was actively working on the cryptanalysis of symmetric-key cryptosystems and variants of subset-sum problem.

My Erdős number is 4 (Me -> Shashank K. Mehta -> Jitender S. Deogun -> Zsolt Tuza -> Paul Erdős).

News

Aug 28, 2025 “Separating Pseudorandom Codes from Local Oracles” accepted in TCC 2025, Aarhus, Denmark.
Aug 18, 2025 Paper presentation at CRYPTO 2025, Santa Barbara, USA.
Aug 11, 2025 Visiting Simons Institute for the Theory of Computing, Berkeley, US.
May 12, 2025 Paper presentation at PKC 2025, Røros, Norway.
May 4, 2025 “A Note on Adaptive Security in Hierarchical Identity-Based Encryption” accepted in CRYPTO 2025!

Selected Publications

  1. Separating Pseudorandom Codes from Local Oracles
    Nico DöttlingAnne Müller, and Mahesh Sreekumar Rajasree
    In Theory of Cryptography - TCC, 2025
  2. A Note on Adaptive Security in Hierarchical Identity-Based Encryption
    Rishab GoyalVenkata Koppula, and Mahesh Sreekumar Rajasree
    In Advances in Cryptology - CRYPTO, 2025
  3. Incompressible Functional Encryption
    Rishab GoyalVenkata KoppulaMahesh Sreekumar Rajasree, and 1 more author
    In Innovations in Theoretical Computer Science - ITCS, 2025
  4. Leakage-Resilient Incompressible Cryptography: Constructions and Barriers
    Kaartik BhushanRishab GoyalVenkata Koppula, and 3 more authors
    International Conference on the Theory and Application of Cryptology and Information Security - ASIACRYPT, 2024