一种支持动态标签的区块链数据隐蔽传输机制

doi:10.19665/j.issn1001-2400.2020.05.013

Abstract

Abstract:

The existing blockchain data covert transmission scheme is faced with the problems of poor concealment, small channel capacity and low efficiency. This paper designs a new model for separating the data embedding mechanism from the transaction filtering mechanism, and proposes a new filtering algorithm based on the address dynamic label. In this scheme,the HMAC algorithm is used to construct the special address label, so that the receiving party can effectively screen the special transaction carrying the concealed information from the massive data in the blockchain ledger, and realize the concealed data transmission in the open blockchain scenario. Simulation results show that the proposed scheme can realize the hidden transmission of data in the real bitcoin network. The concealment and efficiency of the scheme are better than those of the traditional scheme.

Key words: blockchain, information hiding, hash-based message authentication code, dynamic labels, steganography

CLC Number:

TP309.2

SI Chengxiang,GAO Feng,ZHU Liehuang,GONG Guopeng,ZHANG Can,CHEN Zhuo,LI Ruiguang. Covert data transmission mechanism based on dynamic label in blockchain[J].Journal of Xidian University, 2020, 47(5): 94-102.

Figures/Tables 6

References 11

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需求类别	数据嵌入机制	交易筛选机制
隐蔽性需求	中,根据传输任务灵活调整	高,不可区分
信道容量需求	高	低
效率需求	低	高

数据嵌入机制	信道容量	隐蔽性	性能
地址、签名LSB方案	低,1~5 bit	高	低
金额参数	低,16 bit	低	中
签名对应的私钥	高,255 bit	高	低
专用存储参数	高, 大于80 Byte	低	高

缩写	解释
blockHeight	最新的区块高度
blockHash_i	指定高度i的区块的哈希值
Addr_sk	地址对应的私钥
Addr_special	生成的特殊地址
tx_special_list{}	存放特殊交易哈希值的列表
Create_addr()	区块链地址生成函数
HMAC()	密钥相关的哈希运算消息认证码函数
getBlockHash()	获取指定高度区块哈希值的函数
getBlockHeight()	获取区块链系统中最新区块高度的函数

缩写	解释	平均时间/s
t_randomNum	生成随机数	0.000 001 6
t_createAddress	基于获取的哈希值生成地址	0.003 869 9
t_api_height	调用API获取比特币最新高度	1.318 741 3
t_api_hash	调用API获取比特币最新高度	1.571 474 2
t_api_getTx	调用API获取指定地址的相关交易	1.395 004 0
t_api_sendTx	调用API发送比特币交易	2.839 770 6
T_sender	发送方发送1次特殊交易的时间	5.073 886 8
T_receiver_1	接收方检查1个区块的时间	5.837 349 6

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Covert data transmission mechanism based on dynamic label in blockchain

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