基于交易构造和转发机制的区块链网络隐蔽通信方法

doi:10.11959/j.issn.1000-436x.2022161

通信学报 ›› 2022, Vol. 43 ›› Issue (8): 176-187.doi: 10.11959/j.issn.1000-436x.2022161

基于交易构造和转发机制的区块链网络隐蔽通信方法

熊礼治¹^,², 朱蓉¹, 付章杰¹^,²

¹ 南京信息工程大学计算机学院、软件学院、网络空间安全学院，江苏南京 210044
² 数字取证教育部工程研究中心，江苏南京 210044

修回日期:2022-08-03 出版日期:2022-08-25 发布日期:2022-08-01
作者简介:熊礼治（1988- ），男，湖北荆州人，博士，南京信息工程大学教授，主要研究方向为多媒体内容安全、数字取证与区块链安全等
朱蓉（1998- ），女，江苏泰州人，南京信息工程大学硕士生，主要研究方向为区块链与数字取证等
付章杰（1983- ），男，河南南阳人，博士，南京信息工程大学教授、博士生导师，主要研究方向为人工智能安全、区块链安全、数字取证等
基金资助:
国家重点研发计划基金资助项目(2021YFB00900)

Covert communication method of blockchain network based on transaction construction and forwarding mechanism

Lizhi XIONG¹^,², Rong ZHU¹, Zhangjie FU¹^,²

¹ School of Computer Science, Nanjing University of Information Science and Technology, Nanjing 210044, China
² Engineering Research Center of Digital Forensics, Ministry of Education, Nanjing 210044, China

Revised:2022-08-03 Online:2022-08-25 Published:2022-08-01
Supported by:
The National Key Research and Development Program of China(2021YFB00900)

摘要/Abstract

摘要：

针对现有存储型区块链网络隐蔽通信方案存在含密交易多副本、永久存储的问题，以及现有时间型方案隐藏容量低的问题，提出了一种基于交易构造和转发机制的区块链网络隐蔽通信方法。首先发送方借助交易构造机制创建无效交易，并将秘密信息嵌入其中，再利用交易转发机制向邻居节点发送无效交易，形成隐蔽通信信道模型，使含密交易在节点间传播且不存于区块链账本中，达到信息隐蔽安全传输的目的。实验结果表明，传输容量高于现有方案，单次通信时间减少至2.5 s。

关键词: 隐蔽通信, 区块链网络, 比特币交易构造, 比特币交易转发, 无效交易

Abstract:

Aiming at the problems of multiple copies and permanent storage of the transactions containing secret information in the existing storage-based covert communication schemes in blockchain network, as well as the issue of low hidden capacity of the existing time-based schemes, a covert communication method of blockchain network based on transaction construction and forwarding mechanism was proposed.First, an invalid transaction was created by the sender with the help of the transaction construction mechanism, and the secret information was embedded in it, and then the transaction forwarding mechanism was used to send the invalid transaction to the neighbor nodes to form a covert communication channel model, enabling that the transactions containing secret information were spread between nodes and did not exist in the blockchain ledger, so as to achieve the purpose of information concealment and safe transmission.Experimental results show that the transmission capacity of the proposed method is higher than that of the existing schemes, and the single communication time is reduced to 2.5 s.

Key words: covert communication, blockchain network, bitcoin transaction construction, bitcoin transaction forwarding, invalid transaction

中图分类号:

TP309

熊礼治, 朱蓉, 付章杰. 基于交易构造和转发机制的区块链网络隐蔽通信方法[J]. 通信学报, 2022, 43(8): 176-187.

Lizhi XIONG, Rong ZHU, Zhangjie FU. Covert communication method of blockchain network based on transaction construction and forwarding mechanism[J]. Journal on Communications, 2022, 43(8): 176-187.

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字段尺寸/byte	描述	说明
4	version	交易协议版本号
1+	tx_in_count	输入交易的数量
41+	tx_in	一个或多个输入交易组成的数组
1+	tx_out_count	输出交易的数量
8+	tx_out	一个或多个输出交易组成的数组
4	lock_time	交易锁定时间

字段尺寸/B	描述	说明	是否可自定义
32	TX hash	前向交易的哈希值	是
4	output index	前向交易的索引	是
1～9	unlockingscript size	解锁脚本的长度	是
可变长度	unlocking-script	解锁脚本	是
4	sequence	交易序列号	否

字段尺寸/B	描述	说明	是否可自定义
8	amount	交易的比特币数量	是
1～9	locking-script size	锁定脚本的长度	是
可变长度	locking-script	锁定脚本	是

方法	隐藏容量/bpt	单次通信时间	是否上链
BLOCCE	1	10 min	是
DLchain	256	12.5 s	是
ChainChannels	256	12.5 s	是
KBCC	320	12.5 s	是
BDTX	552	10 min	是
本文方法	≥1 376	2.5 s	否

基于交易构造和转发机制的区块链网络隐蔽通信方法

Covert communication method of blockchain network based on transaction construction and forwarding mechanism

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