no code implementations • 7 Nov 2022 • Masahito Hayashi, Seunghoan Song
Oblivious transfer is considered as a cryptographic primitive task for quantum information processing over quantum network.
no code implementations • 29 May 2022 • Masahito Hayashi, Seunghoan Song
This paper unifiedly addresses two kinds of key quantum secure tasks, i. e., quantum versions of secret sharing (SS) and symmetric private information retrieval (SPIR) by using multi-target monotone span program (MMSP), which characterizes the classical linear protocols of SS and SPIR.
no code implementations • 28 Jun 2021 • Matteo Allaix, Seunghoan Song, Lukas Holzbaur, Tefjol Pllaha, Masahito Hayashi, Camilla Hollanti
A general statement on the converse bound for QPIR with coded and colluding servers is derived showing that the capacities of stabilizer QPIR and dimension-squared QPIR induced from any class of PIR are upper bounded by twice the classical capacity of the respective PIR class.