中文摘要：

高效的秘密分享方案在保护加解密密钥、门限密码系统、多方安全协议等方面发挥着重要作用．文中主要考虑空间有效的秘密分享问题．作者提出一个新的不需要安全信道的空间有效秘密分享方案．方案构造简捷、运行高效，并且在分发者和参与者之间发送信息不需要秘密信道的支持．文中给出了对新方案的安全性和性能的分析，同时给出了方案的工作流程图和一个简单的示例．由于安全性和性能方面的优点，新方案可广泛应用于诸如长期档案安全存储系统、资源受限环境（传感器网络、移动网络等）下机密信息的保护等方面．

英文摘要：

Efficient secret sharing schemes play significant roles in areas such as safe guarding cryptographic keys, threshold cryptosystems, and secure multi-party protocols, etc. This paper focuses on the problem of space efficient secret sharing. We propose a space efficient secret sharing scheme without using private channels. The new scheme enjoys a simple construction and high efficiency. It does not require secure channels between the dealer and the share holders. The security analysis and performance analysis of the new construction are presented. We also give the execution flow chart and a very simple example to demonstrate how our secret sharing scheme works. Due to its security and performance features, the new scheme can be extensively applied in Long-Term archival storage system, and the safe guarding of very confidential information in resource constrained environments such as sensor networks and mobile networks, etc.