51 citations · 116 across the 10 of their papers we have counts for
9 papers · 1 filter
Security of Device-independent Quantum Key Distribution under Sequential Attack
Pritam Roy, Souradeep Sasmal, Subhankar Bera +3
Device-independent quantum key distribution (DI-QKD) leverages nonlocal correlations to establish cryptographic keys between two honest parties while making minimal assumptions abo…
Device-Independent Quantum Secure Direct Communication Under Non-Markovian Quantum Channels
Pritam Roy, Subhankar Bera, Shashank Gupta +1
Device-independent quantum secure direct communication (DI-QSDC) is a promising primitive in quantum cryptography aimed towards addressing the problems of device imperfections and…
Genuine three qubit Einstein-Podolsky-Rosen steering under decoherence: Revealing hidden genuine steerability via pre-processing
Shashank Gupta
The behaviour of genuine EPR steering of three qubit states under various environmental noises is investigated. In particular, we consider the two possible steering scenarios in th…
A universal whitening algorithm for commercial random number generators
Avval Amil, Shashank Gupta
Random number generators are imperfect due to manufacturing bias and technological imperfections. These imperfections are removed using post-processing algorithms that in general c…
Quantum entropy expansion using n-qubit permutation matrices in Galois field
Avval Amil, Shashank Gupta
Random numbers are critical for any cryptographic application. However, the data that is flowing through the internet is not secure because of entropy deprived pseudo random number…
Device-Independent Quantum Key Distribution Using Random Quantum States
Subhankar Bera, Shashank Gupta, A. S. Majumdar
We Haar uniformly generate random states of various ranks and study their performance in an entanglement-based quantum key distribution (QKD) task. In particular, we analyze the ef…
Quantum contextuality provides communication complexity advantage
Shashank Gupta, Debashis Saha, Zhen-Peng Xu +2
Despite the conceptual importance of contextuality in quantum mechanics, there is a hitherto limited number of applications requiring contextuality but not entanglement. Here, we s…
Eavesdropping a Quantum Key Distribution network using sequential quantum unsharp measurement attacks
Yash Wath, Hariprasad M, Freya Shah +1
We investigate the possibility of eavesdropping on a quantum key distribution network by local sequential quantum unsharp measurement attacks by the eavesdropper. In particular, we…
"All-versus-nothing" proof of genuine tripartite steering and entanglement certification in the two-sided device-independent scenario
Shashank Gupta, Debarshi Das, C. Jebarathinam +3
We consider the task of certification of genuine entanglement of tripartite states. For this purpose, we first present an "all-versus-nothing" proof of genuine tripartite Einstein-…