Unconditionally secure single qubit quantum secret sharing
Guang Ping He, Z. D. Wang · arXiv (Cornell University) · 2007
Analyzing carefully an experimentally feasible non-entangled single qubit quantum secret sharing protocol and its modified version [Phys. Rev. Lett. 95, 230505 (2005); ibid. 98, 028902 (2007)], it is found that both versions are insecure against coherent attacks though the original idea is so remarkable. To overcome this fatal flaw, here we propose a secure protocol with a distinct security checking strategy, which still involves single qubit operations only, making it possible to achieve unconditionally secure quantum secret sharing with current technology.