Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Nikolopoulos, P. M."'
Publikováno v:
Appl. Sci. 14(1), 464, (2024)
Quantum key-distribution protocols allow two honest distant parties to establish a common truly random secret key in the presence of powerful adversaries, provided that the two users share beforehand a short secret key. This pre-shared secret key is
Externí odkaz:
http://arxiv.org/abs/2302.07623
Autor:
Nikolopoulos, Georgios M.
Publikováno v:
Applied Sciences 12, 11985 (2022)
We address the question of whether the presence of Kerr nonlinearity in multiple-scattering optical media offers any advantage with respect to the design of physical unclonable functions. Our results suggest that under certain conditions, nonlinear p
Externí odkaz:
http://arxiv.org/abs/2211.11499
Autor:
Nikolopoulos, Georgios M.
Publikováno v:
Physica Scripta 98, 014001 (2023)
We introduce a computational problem of distinguishing between the output of an ideal coarse-grained boson sampler and the output of a true random number generator, as a resource for cryptographic schemes, which are secure against computationally unb
Externí odkaz:
http://arxiv.org/abs/2211.04420
Autor:
Nikolopoulos, Georgios M.
Publikováno v:
Photonics 8(7), 289 (2021)
Physical unclonable functions have been shown a useful resource of randomness for implementing various cryptographic tasks including entity authentication. All of the related entity authentication protocols that have been discussed in the literature
Externí odkaz:
http://arxiv.org/abs/2108.00468
Publikováno v:
Cryptography 4 (4), 31 (2020)
In conventional cryptography, information-theoretically secure message authentication can be achieved by means of universal hash functions, and requires that the two legitimate users share a random secret key, which is twice as long as the message. W
Externí odkaz:
http://arxiv.org/abs/2011.06849
Publikováno v:
Cryptography 3 (4), 25 (2019)
Optical physical unclonable keys are currently considered to be rather promising candidates for the development of entity authentication protocols, which offer security against both classical and quantum adversaries. In this work we investigate the r
Externí odkaz:
http://arxiv.org/abs/1910.11579
Autor:
Nikolopoulos, Georgios M.
Publikováno v:
Optics Express Vol. 27, 29367-29379 (2019)
We investigate the possibility of using multiple-scattering optical media, as resources of randomness in cryptographic tasks pertaining to commitments and auctions. The proposed commitment protocol exploits standard wavefront-shaping and heterodyne-d
Externí odkaz:
http://arxiv.org/abs/1909.13094
Publikováno v:
EPL, 129 (2020) 37003
We study a two-species mixture of exciton-polaritons with self- and cross-interaction nonlinearities in a double well structure, in the presence of relaxation and continuous pumping. We identify the conditions that render the system parity-time ($\ma
Externí odkaz:
http://arxiv.org/abs/1908.00851
Autor:
Nikolopoulos, Georgios M.
Publikováno v:
Quantum Inf Process (2019) 18: 259
The quest for practical cryptographic primitives that are robust against quantum computers is of vital importance for the field of cryptography. Among the abundance of different cryptographic primitives one may consider, one-way functions stand out a
Externí odkaz:
http://arxiv.org/abs/1907.01788
Publikováno v:
Phys. Rev. A 98, 012304 (2018)
We propose a protocol for state transfer and entanglement generation between two distant spin qubits (sender and receiver) that have different energies. The two qubits are permanently coupled to a far off-resonant spin-chain, and the qubit of the sen
Externí odkaz:
http://arxiv.org/abs/1806.05122