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Vikas Srivastava

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Design and Analysis of Four-State Quantum Public-Key Encryption Scheme

This paper analyzes the four-state QPKE scheme of Liu et al. and shows that its ciphertext structure leaks information about computational-basis plaintexts, and proposes sQPKE, a simple quantum public-key encryption scheme that uses only elementary operations.

Rahul Kumar, Vikas Srivastava · 0 citations
Preprint Aug 2026

Pivot: Proactive and Verifiable Threshold Oblivious Pseudorandom Functions From Isogeny Group Actions

PIVOT (Proactive Isogeny-based Verifiable Oblivious Threshold PRF), a dealerless threshold VOPRF framework based on effective isogeny group actions, is introduced, which formalizes the functionality of a long-lived proactive threshold VOPRF, proves the correctness of distributed key generation, threshold evaluation, pr...

Abhinav Sharma, Vikas Srivastava · 0 citations

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