基于区块链的云数据匿名确定性删除方法

doi:10.11959/j.issn.1000-0801.2021049

Abstract

Abstract:

The previous assured deletion schemes ignored that the privacy is threated by the relevance between data and user identity, exposing user behavior to the cloud service provider or attackers.Aiming at the above problems, an assured deletion approach based on blockchain was proposed.The improved linkable ring signature scheme was adopted to make user achieve anonymous assured deletion by setting specific link symbol in the signature.Moreover, the blockchain technology was leveraged to guarantee the nonrepudiation of assured deletion.Theoretical analysis and experimental results show that the proposed approach can meet the assured deletion requirements of user data in cloud storage, and its anonymity can effectively prevent attackers from tracking and analyzing user behavior.

Key words: assured deletion, blockchain, linkable ring signature, privacy-preserving

CLC Number:

TP393

Shuangxing WANG, Jintang LUO, Lisha SHUAI, Jiamin ZHANG, Min ZHANG, Xiaolong YANG. Cloud data anonymous assured deletion approach based on blockchain[J]. Telecommunications Science, 2021, 37(3): 90-104.

Figures/Tables 13

缩写	含义
SDO	secret data object，秘密数据封装体
DVO	data visit object，数据访问封装体
GF(p)	由p确定的有限域
$ℤ_{q}$	q阶整数域
H(·)	消息摘要函数
H₁(·)，H₂(·)	统计独立的单向散列函数，其中H₂(0)=0
H₃(·)	消息映射函数，将消息映射到整数域，以便进行运算。 $H_{3}^{- 1} (\cdot)$ 是其逆运算
data₁\|\| data₂	将data₁与data₂进行拼接，\|\|为字符串拼接符号

References 19

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上传阶段	节点数量								平均
上传阶段	20	30	40	50	60	70	80	90	平均
秘密拆分	0.46%	0.30%	0.23%	0.19%	0.15%	0.13%	0.11%	0.10%	0.21%
RSA加密	9.25%	9.42%	9.33%	9.67%	9.61%	9.30%	17.33%	17.33%	11.41%
RSA解密	9.52%	9.53%	9.57%	9.24%	9.25%	9.27%	8.77%	8.77%	9.24%
签名	50.88%	50.41%	49.46%	49.73%	49.10%	49.04%	43.02%	42.42%	48.01%
验证签名	27.86%	27.23%	26.97%	26.07%	25.70%	24.97%	22.38%	22.31%	25.44%
其他	2.02%	3.11%	4.44%	5.10%	6.19%	7.30%	8.38%	9.06%	5.70%

请求阶段	节点数量								平均
请求阶段	20	30	40	50	60	70	80	90	平均
RSA加密	3.63%	2.69%	2.09%	1.84%	1.55%	1.31%	1.28%	1.17%	1.94%
RSA解密	72.32%	79.23%	83.20%	84.48%	86.14%	87.40%	88.13%	88.79%	83.71%
签名	10.26%	7.51%	5.88%	5.06%	4.32%	3.80%	3.21%	2.87%	5.36%
验证签名	11.18%	8.04%	6.33%	5.24%	4.45%	3.81%	3.27%	2.95%	5.66%
秘密重构	0.18%	0.09%	0.05%	0.03%	0.02%	0.02%	0.01%	0.01%	0.05%
其他	2.43%	2.44%	2.44%	3.34%	3.52%	3.66%	4.10%	4.21%	3.27%

确定性删除阶段	节点数量								平均
确定性删除阶段	20	30	40	50	60	70	80	90	平均
RSA加密	12.61%	12.83%	12.70%	13.21%	13.14%	12.78%	13.97%	13.95%	13.15%
RSA解密	12.97%	12.98%	13.02%	12.63%	12.65%	12.73%	11.63%	11.62%	12.53%
签名	35.63%	35.82%	35.77%	36.43%	36.53%	37.19%	36.90%	36.78%	36.38%
验证签名	34.55%	34.11%	34.11%	33.06%	33.00%	32.60%	32.80%	32.92%	33.39%
其他	4.25%	4.26%	4.40%	4.66%	4.68%	4.70%	4.70%	4.72%	4.55%

Cloud data anonymous assured deletion approach based on blockchain

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