TY - JOUR
T1 - Quantum strongly secure ramp secret sharing
AU - Zhang, Paul
AU - Matsumoto, Rytaro Yamashita
PY - 2015/2/1
Y1 - 2015/2/1
N2 - Quantum secret sharing is a scheme for encoding a quantum state (the secret) into multiple shares and distributing them among several participants. If a sufficient number of shares are put together, then the secret can be fully reconstructed. If an insufficient number of shares are put together however, no information about the secret can be revealed. In quantum ramp secret sharing, partial information about the secret is allowed to leak to a set of participants, called an unqualified set, that cannot fully reconstruct the secret. By allowing this, the size of a share can be drastically reduced. This paper introduces a quantum analog of classical strong security in ramp secret sharing schemes. While the ramp secret sharing scheme still leaks partial information about the secret to unqualified sets of participants, the strong security condition ensures that qudits with critical information can no longer be leaked.
AB - Quantum secret sharing is a scheme for encoding a quantum state (the secret) into multiple shares and distributing them among several participants. If a sufficient number of shares are put together, then the secret can be fully reconstructed. If an insufficient number of shares are put together however, no information about the secret can be revealed. In quantum ramp secret sharing, partial information about the secret is allowed to leak to a set of participants, called an unqualified set, that cannot fully reconstruct the secret. By allowing this, the size of a share can be drastically reduced. This paper introduces a quantum analog of classical strong security in ramp secret sharing schemes. While the ramp secret sharing scheme still leaks partial information about the secret to unqualified sets of participants, the strong security condition ensures that qudits with critical information can no longer be leaked.
KW - Non-perfect secret sharing
KW - Quantum secret sharing
KW - Ramp secret sharing
KW - Strong security
U2 - 10.1007/s11128-014-0863-2
DO - 10.1007/s11128-014-0863-2
M3 - Journal article
SN - 1570-0755
VL - 14
SP - 715
EP - 729
JO - Quantum Information Processing
JF - Quantum Information Processing
IS - 2
ER -