An Outsourceable and Policy-Hidden Attribute-Based Encryption Scheme in the IIoT System

doi:10.3969/j.issn.1671-1122.2023.03.001

Abstract

Abstract:

The data access control scheme in the IIoT environment has some prominent problems, such as the heavy computing burden of the decryption device, failure to protect the private information of the decryption device, and failure to track illegal device. To solve the above problems, an outsourced policy-hidden attribute-based encryption scheme in the IIoT environment was proposed. In the scheme, with the help of edge computing technology, most of the decryption operations of massive industrial data were outsourced to edge computing nodes, thus significantly reducing the computational burden of decryption devices. The access structure in ABE was divided into two parts in the scheme, thus introducing the technology of policy hiding, which protected the privacy information of decryption devices while achieving the confidentiality of the industrial data. In addition, blockchain technology was used to achieve the supervision and audit of equipment in the system. Through formal analysis, it is proven to be secure in a selectively chosen-plaintext attack(CPA). By using the PBC cryptographic library and Hyperledger Fabric blockchain platform, simulations of this scheme with existing schemes are performed. The experiment results show that this scheme has high computational efficiency and is suitable for IIoT environments.

Key words: IIoT, blockchain, edge computing, privacy protection, ABE

CLC Number:

TP309

GUO Rui, WEI Xin, CHEN Li. An Outsourceable and Policy-Hidden Attribute-Based Encryption Scheme in the IIoT System[J]. Netinfo Security, 2023, 23(3): 1-12.

Figures/Tables 13

References 34

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符号	含义
$PP$	系统公共参数
$MSK$	系统主密钥
$R$	用户撤销列表
$SK$	属性密钥
$TK$	转换密钥
$S$	用户属性集合
$CT$	密文消息
$TCT$	转换消息
$m$	明文密文

符号	含义
$E$	群上的一次指数运算
$P$	群上的一次双线性对运算
$M$	群上的一次点乘运算
$s$	用户属性数量
$l$	秘密分享矩阵行数
$u$	解密密钥的属性数量
$r$	撤销列表的用户数量
—	该方案不适用

	文献[21]方案	文献[33]方案
密钥生成	$(3+2s)E+(1+2s)M$	$(5+3s)E+(1+2s)M$
加密	$(5+6l)E+(1+4l)M$	$(3+5l)E+(1+2l)M$
解密	$(2+4u)P+2uE+(3+2u)M$	$(1+3u)P+(2+u)E+(4+2u)M$
外包解密	—	—
追踪	—	$(5+3s)P+(2+s)E+(3+2s)M$
密文更新	—	—
	文献[34]方案	本文方案
密钥生成	$(6+s)E+(2+s)M$	$(7+s)E+(1+s)M$
加密	$(1+8l)E+(2+l)M$	$(3+3r+4l)E+(1+4l)M$
解密	$4uP+4uE+(1+4u)M$	$(3+3u)P+(3+u+2r)E+(7+2u)M$
外包解密	$4uP+2uE+6uM$	$(1+3u)P+(1+2u)E+(1+3u)M$
追踪	$2P+3E+2M$	$O(n)$
密文更新	$(1+8l)E+(3+8l)M$	$(6+3r)E+(3+2r)M$