支持策略更新的外包属性加密

林素青

doi:10.11959/j.issn.2096-109x.2016.00055

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支持策略更新的外包属性加密

学术论文 | 更新时间：2024-06-03

- 支持策略更新的外包属性加密
- Outsourced attribute-based encryption with policy update
- 网络与信息安全学报 2016年2卷第5期页码：39-49
- 作者机构：
  
  1. 中国科学院信息工程研究所信息安全国家重点实验室，北京 100093
  2. 中国科学院大学，北京100049
- 作者简介：
  
  [ "林素青（1982-），女，浙江温州人，中国科学院信息工程研究所博士生，主要研究方向为信息安全、密码学。" ]
- 基金信息：
  
  国家自然科学基金资助项目;The National Natural Science Foundation of China(61379142)
- DOI：10.11959/j.issn.2096-109x.2016.00055
  中图分类号： TP309.7
- 网络首发：2016-05，
  
  纸质出版：2016-05-15
- 稿件说明：
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林素青. 支持策略更新的外包属性加密[J]. 网络与信息安全学报, 2016,2(5):39-49.

Su-qing LIN. Outsourced attribute-based encryption with policy update[J]. Chinese Journal of Network and Information Security, 2016, 2(5): 39-49.
林素青. 支持策略更新的外包属性加密[J]. 网络与信息安全学报, 2016,2(5):39-49. DOI： 10.11959/j.issn.2096-109x.2016.00055.

Su-qing LIN. Outsourced attribute-based encryption with policy update[J]. Chinese Journal of Network and Information Security, 2016, 2(5): 39-49. DOI： 10.11959/j.issn.2096-109x.2016.00055.

摘要

摘要：为满足云存储密态数据高效灵活的访问需求，提出支持策略更新的外包属性加密方案。以经典的属性加密方案为基础模块，采用类密钥盲化方法和外包解密技术，在确保明文数据和用户私钥不泄露的条件下，实现密文访问策略的代理更新，同时切实有效地降低终端用户的解密计算量。方案支持非单调的访问结构，在标准模型和假设下可证明具有选择 IND-CPA 安全性和私钥安全性，与文献同类方案相比，实现了安全性和终端访问效率的进一步优化。

Abstract

In order to achieve the efficient and flexible access control for the encrypted data stored in the cloud

an outsourced attribute-based encryption scheme with policy update was proposed.Based on the standard attribute-based encryption scheme

the functionality of policy update from delegation for a ciphertext without revealing any confidential information of the plaintext and private keys by utilizing the techniques of key blinding and outsourcing decryption was accomplished.Simultaneously

the decryption overhead for a user to recover the plaintext was effectively reduced.The scheme supports non-monotonic access structure and can be proved to have selective IND-CPA security and private key security under standard assumptions

respectively

in the standard model.Compared with similar schemes from literatures

the scheme provides better security and efficiency.

关键词

Keywords

references

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