.png){kind=icon}
.png){kind=icon}
Return
The covert communication model based on multi-channel and vector space coding
.png){kind=icon}
PRE
AI
DOI：10.1007/s10207-025-01200-2.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Existing blockchain-based covert communication schemes encounter persistent challenges, including inadequate security guarantees and limited embedding capacity. Additionally, the parties involved in such communications often rely on static keys for extended periods, and multiple transaction addresses demonstrate inherent correlations due to their derivation relationships or fund flows. This vulnerability enables third-party attackers to trace all related addresses once a specific covert transaction is exposed. To address these issues, we introduce a covert communication model based on multi-channel and vector space coding, featuring three key innovations. Firstly, we organize communication addresses into multiple groups and develop an address space coding strategy based on vector space coding. Secondly, we integrate transaction amounts and transaction IDs with transaction address to facilitate the transmission of single-session communication keys. Finally, we embed pseudorandom ciphertext into digital signature channel and achieve a high embedding capacity per transaction by employing ring signatures and UTXO structures. Moreover, we provide a theoretical analysis evaluating various aspects of the model, including tamper resistance, detection resistance, correlation resistance, and scalability. Performance validation is further supported by experiments assessing efficiency, embedding rate, ciphertext randomness, and the impact of the number of groups.
Keywords:
Covert communication
Blockchain
Multi-channel
Journal
I
IF:
3.2
Papers:
117
Citations:
1.8K