中文摘要：

针对现有云存储中可能存在的多个节点数据丢失或不可用的情况，提出了基于三维立体模型（TD-model）的安全云存储方法。首先将拟存储的数据进行网络编码，并将编码后的数据块均匀存储到所选立体的两个对立面（作为基准面）上，形成基准节点；其次，采用数学运算的方式在每个面上形成非基准节点，使每个面的节点之间相互关联；最终，通过六个面的相关性实现数据的高可恢复性。实验结果表明，相比传统的副本存储方法，TD-model安全云存储方法可在多节点失效时对数据进行恢复，提高了数据恢复效率，保证了数据的完整性，克服了现有方法中只能对单节点失效进行恢复的弊端。

英文摘要：

Focusing on the data lost or unavailable reference in cloud storage, a secure cloud storage method based on Three-Dimensional model （TD-model） was proposed. Firstly, base nodes of TD-model method were formed by encoding the data, which would be stored uniformly into two opposite sides in the TD-model. Secondly, normal nodes were formed in each side by mathematical computing, and the nodes of each side ensure connection. Finaily, high data availability was achieved by the correlation of all the six sides. The experimental results show that compared with the traditional replica storage methods, the secure cloud storage method based on TD-model enhances data recovery efficiency and ensures data integrity. In addition, the proposed method can overcome the drawback of traditional methods that only the single node failure can be recovered.