
›› 2018,Vol. 33 ›› Issue (2): 380399.doi: 10.1007/s1139001818254
• Theory and Algorithms • 上一篇 下一篇
Shengmin Xu, Guomin Yang, Member, IEEE, Yi Mu, Senior Member, IEEE
Shengmin Xu, Guomin Yang, Member, IEEE, Yi Mu, Senior Member, IEEE
随着云计算和移动应用程序的普及，诸如在线音乐或音频流和车辆预订等按需服务现在广泛应用。为了有效地提供和管理服务，对于大型按需系统，通常有一个层次结构，服务提供商可以将其服务委托给顶级（如全国）代理，然后可以进一步委托服务到较低级别（如全区域）代理。安全（重）授权和撤销是这些系统最重要的组成之一。在本文中，我们调查了利用代理签名实现重新授权和撤销的实际解决方案。虽然文献中已经广泛研究了代理签名，但以前的解决方案都不能实现这两个特性。为弥补这个问题，我们介绍了可撤销和可重代理的代理签名的概念，支持有效撤销，并允许代理签名者将其签名权重新委托给其他代理签名者，而不与原始签名者进行交互。我们为这个新的原语定义正式的安全模型，并提出一个可以实现所有安全属性的有效方案。我们还提供一个安全的在线可撤销和重代理的车辆订购系统（RRVOS）作为我们提出的方案的应用之一。
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