【摘要】 基于信息数据碎片化的多道隔离传输，是在信息传输过程中保证其安全性的常用方法之一，但其缺乏可证明安全性理论和测评方法。本文形式化地定义了一个多道碎片化传输系统，包括数据的加密、碎片切分多道传输和重组功能。从多信道传输过程中数据泄露概率分析，定义多道碎片化传输技术的可证明安全等级。建立一套多信道数据碎片化传输的安全等级评估方法，从理论角度对于安全等级评估方法的有效性加以验证，为多信道数据碎片化传输技术的实现提供理论指导，同时为多信道数据碎片化传输系统的安全评测提供借鉴。该方法也适用于数据碎片化存储及传输相关领域的安全性分析。更多还原

【Abstract】 Multi-channel isolation transmission based on fragmentation of information data is one of the common methods to ensure the security of information transmission, but it lacks the theory of provable security and evaluation methods. A multi-channel fragmentation transmission system is formally defined firstly, including data encryption, fragmentation multi-channel transmission and recombination functions. Then from the data leakage probability analysis in the process of multi-channel transmission, the provable security level of multi-channel fragmentation transmission technology is defined. A set of security level evaluation methods for multi-channel data fragmentation transmission is established to verify the effectiveness of the security level evaluation method from the theoretical point of view. This paper provides theoretical guidance for the realization of multi-channel data fragmentation transmission technology and guidelines for the security evaluation of multi-channel data fragmentation transmission system. The proposed method can also be applied to the security analysis of data fragmentation storage and transmission.更多还原