5 research outputs found
Semiquantum secret sharing by using x-type states
In this paper, a semiquantum secret sharing (SQSS) protocol based on x-type
states is proposed, which can accomplish the goal that only when two classical
communicants cooperate together can they extract the shared secret key of a
quantum communicant. Detailed security analysis turns out that this protocol
can resist the participant attack and the outside attack. This protocol has
some merits: (1) it only requires one kind of quantum entangled state as the
initial quantum resource; (2) it doesn't employ quantum entanglement swapping
or unitary operations; and (3) it needn't share private keys among different
participants beforehand.Comment: 18 pages, 1 figure, 3 table
A novel hybrid protocol for semiquantum key distribution and semiquantum secret sharing
In this paper, a novel hybrid protocol for semiquantum key distribution
(SQKD) and semiquantum secret sharing (SQSS) was constructed by using GHZ-like
states. This protocol is capable of establishing two different private keys
between one quantum party and two semiquantum parties respectively, and making
two semiquantum parties share another private key of the quantum party in the
meanwhile. The usages of delay lines, Pauli operations, Hadamard gates and
quantum entanglement swapping are not required. Moreover, the semiquantum
parties are not necessary to be equipped with any quantum memory. We validate
in detail that this protocol resists various attacks from Eve, including the
Trojan horse attacks, the entangle-measure attack, the double controlled-not
(CNOT) attacks, the measure-resend attack and the intercept-resend attack. To
our best knowledge, this protocol is the only protocol which possesses the
functions of both SQKD and SQSS simultaneously until now.Comment: 16 pages,1 figure, 3 table