轻量级的仲裁半量子秘密共享

Lightweight Mediated Semi-quantum Secret Sharing

半量子秘密共享(SQSS)研究部分参与者只有有限的量子能力时,如何实现保密信息在合法参与者之间安全共享的问题。文中提出了两个新的半量子秘密共享方案,一个是基于单粒子的秘密共享方案,允许多个经典参与者在可信的第三方的帮助下共享密钥,其中经典参与者和第三方的量子能力都是有限的,该协议节约了量子资源,更易于实现;另一个是基于Bell态的半量子秘密共享方案,在不可信的第三方帮助下共享密钥,该协议具有更高的安全性。由于减少了参与者的量子设备需求,轻量级的仲裁量子秘密共享方案在未来的云量子场景下具有广泛的应用前景。

Semi-quantum secret sharing(SQSS)studies how to realize the secure sharing of confidential information among legitimate participants when some participants have only limited quantum capabilities.Two new secret sharing scheme are proposed.One is the secret sharing scheme based on single particle,which allows multiple classic participants to share secret with the help of the trusted third party(TP).The quantum capacity of classic participants and the TP is limited.The agreement saves quantum resources and is easier to implement.The other is the secret sharing scheme based on Bell state,which shares the secret keys with the help of untrusted TP,with higher security.Since the protocol reduces the quantum device requirements of the participants,the lightweight arbitration quantum secret sharing scheme will be more practical in future cloud quantum scene.