Mahesh Sreekumar Rajasree
CISPA Helmholtz Center for Information Security, Sankt Ingbert, Germany
I am currently a Postdoctoral 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 Postdoctoral 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 (as a Prime Minister’s Research Fellow) 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 the subset-sum problem.
My Erdős number is 3 (Me -> Antoine Joux -> Andrew M. Odlyzko -> Paul Erdős).
News
| Jul 3, 2026 | “Pigeonhole Equal Subset Sum: Subexponential Algorithm, Tight Lower Bounds and Average-Case Analysis” accepted at FOCS 2026! |
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| Jun 1, 2026 | Research visit to Charles III University of Madrid, Leganés Campus, Madrid, Spain, hosted by Prof. Lorena González-Manzano. |
| May 25, 2026 | Research visit and talk at IMDEA Software Institute, Madrid, Spain, hosted by Prof. Dario Fiore. |
| May 5, 2026 | “Chosen Ciphertext Secure Pseudorandom Codes in the Standard Model” accepted at CRYPTO 2026! |
| Mar 31, 2026 | Research visit to Faculty of Mathematics, Informatics, and Mechanics, University of Warsaw, Poland. |
Selected Publications
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Pigeonhole Equal Subset Sum: Subexponential Algorithm, Tight Lower Bounds and Average-Case AnalysisIn Foundations of Computer Science - FOCS, 2026
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Chosen Ciphertext Secure Pseudorandom Codes in the Standard ModelIn Advances in Cryptology - CRYPTO, 2026