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

Abstract

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

CLC Number:

TP309

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.

Figures/Tables 17

References 23

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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

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

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