计算机与现代化

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高效撤销的密文策略属性基加密方案

  

  1. 河海大学计算机与信息学院,江苏南京211100
  • 收稿日期:2015-07-28 出版日期:2015-12-23 发布日期:2015-12-30
  • 作者简介:姚伟(1991-),男,河北张家口人,河海大学计算机与信息学院硕士研究生,研究方向:密码学与信息安全; 沙凤杰(1988-),男,硕士研究生,研究方向:密码学与信息安全; 林啸楠(1991-),男,硕士研究生,研究方向:密码学与信息安全。

CPABE Scheme with Efficient Attribute Revocation

  1. School of Computer and Information, Hohai University, Nanjing 211100, China
  • Received:2015-07-28 Online:2015-12-23 Published:2015-12-30

摘要:
摘要:作为新型的密码学原语,属性基加密方案通过一系列属性来定义一个用户,并且实现了细粒度访问控制。然而,复杂、耗时的撤销操作成为限制属性基加密方案应用的瓶颈问题。为了解决属性基加密方案中的撤销问题,本文提出一种高效属性撤销的密文策略属性基加密方案。该方案通过固定长度的撤销列表记录撤销用户,撤销过程不必更新系统密钥及相关用户的密钥,大大降低了撤销所引起的计算开销。

关键词: 属性基, 访问控制, 撤销, 合谋攻击, 撤销列表

Abstract: As a new cryptographic primitive, attributebased encryption (ABE) scheme uses several attributes to identify a user and achieves finegrained access control. However, the complex issue of user revocation has become a bottlenect in ABE schemes. To solve the problem, the paper proposed a ciphertextpolicy attribute based encryption (CPABE) scheme with efficient user revocation. In this scheme, lists with content length are maintained to record the revoked users. Attribute revocation was excuted by the trusted authority without updating the keys of the system and the associated users, which reveals computation overhead in revocation.:

Key words: ABE, access control, revocation, collusion attack, revocation lists

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