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 3 (Me -> Antoine Joux -> Andrew M. Odlyzko -> Paul Erdős).

News

Dec 8, 2025 Visiting Prof. Christian Majenz at DTU, Denmark.
Dec 1, 2025 Won the Outstanding Paper Award for “Separating Pseudorandom Codes from Local Oracles” in TCC 2025, Aarhus, Denmark.
Dec 1, 2025 Attending TCC 2025, Aarhus, Denmark.
Nov 24, 2025 Attended CISPA-MPI-UdS retreat at Trier, Germany.
Aug 28, 2025 “Separating Pseudorandom Codes from Local Oracles” accepted in TCC 2025, Aarhus, Denmark.

Selected Publications

  1. Separating Pseudorandom Codes from Local Oracles
    Nico DöttlingAnne Müller, and Mahesh Sreekumar Rajasree
    In Theory of Cryptography - TCC, 2025
    Outstanding Paper Award
  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