支持外包计算的属性基加密方案
摘要
方案中存在加解密运算成本高、属性更新困难、访问策略显式存储和恶意解密限制不足等挑战,我们的方案提出一种支持策
略隐藏的可验证外包计算的属性基加密方案。该方案使用外包加解密技术,降低了用户端加解密成本。考虑到访问策略可能
会包含数据所有者的隐私信息,我们提出了一种策略隐藏方案。使用星际文件系统(IPFS)存储密文,确保存储数据的安全
性。使用可验证随机函数(VRF)实现有限的匿名访问控制,防止恶意用户发出大量外包解密请求,从而过度占用智能设备的
计算资源。此外,该方案支持用户的属性更新。理论分析表明,该方案在标准模型下是选择明文攻击(CPA)安全的,实验结
果表明,该方案能够减轻用户端的计算负担,并通过智能设备验证解密数据的正确性。
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PDF参考
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DOI: http://dx.doi.org/10.12361/2661-3727-04-10-126201
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