# A Novel Cryptography-Based Architecture for Secure Data Asset Sharing and Circulation Systems
## 6 System Implementation
### System Function Comparison
#### 6.5.4 Secure Transmission  
In uncontrolled environments with strong adversarial conditions, massive data return transmission faces security threats such as eavesdropping, tracking, traceability, and blocking. To address these challenges, a novel data transmission channel resistant to traceability, tracking, and analysis is designed, based on advanced cryptographic techniques such as zero-knowledge proofs and oblivious transfer, combined with anonymous communication technology. This ensures data transmission security across dimensions such as traffic characteristics, communication relationships, network topology, information content, and user identities, while resisting colluding attacks. By leveraging intelligent operation and maintenance management technology, a secure data transmission channel is constructed that supports rapid deployment and resource reconstruction according to demand. From the comparison of security features provided in Table 4, it can be seen that the proposed approach provides comprehensive traceless capabilities across five dimensions: traffic characteristics, communication relationships, network topology, user identities, and information content. This ensures transmission security even when some nodes act maliciously and supports the construction of customized transmission channels within minutes, enabling parallel scheduling of thousands of data streams.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Paper** & **Multi-Dimensional Security** & **Anti-Tracing and Anti-Blocking** & **Intelligent Management** \\ \hline
[22] & Support user identity and information content security & Supports only anti-tracing and & \(\star\) \\ \hline
[23] & Support user identity, information content, and communication relationship security & Support anti-tracing and anti-blocking based on dynamic path changes and multi-path fault tolerance technology & \(\star\) \\ \hline ours & Supports five-dimensional data transmission security, including traffic characteristics, communication relationships, network topology, information content, and user identity & Support intelligent channel identification and classification based on a concurrent transmission model & Support intelligent channel reconstruction and rapid deployment based on node collaborative perception \\ \hline \hline \end{tabular} Note: ‘\(\star\)’ represents that this security feature is not available.  
\end{table}
Table 4: Comparison of security features in secure transmission.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Paper** & **Multi-Type Operation Awareness** & **Trusted Operation** & **Operation Traceability** \\ \hline
[9] & Support block-level dynamic operations, including data insertion, modification, and deletion & \(\star\) & Supports the block-chain-based data auditing, which can prevent malicious behavior from all entities. \\ \hline
[21] & Supports dynamic operations, including data insertion, modification, and deletion. & Support chameleon hash–based data auditing, which can quickly determine if blockchain data have been unauthorizedly modified & Support the tracking for malicious users based on the bilinear map and discrete logarithm problem \\ \hline ours & Support fine-grained identification of data assets, operational entities, and operational environments & Support trusted operations based on multi-policy rules and smart contracts & Support traceability of operations based on a trusted audit chain \\ \hline \hline \end{tabular} Note: ‘\(\star\)’ represents that this security feature is not available.  
\end{table}
Table 3: Comparison of security features in trustworthy operations.