OAuth2.0是一个开放标准的第三方授权协议,允许用户授权第三方平台获取在某一网站上存储的用户个人资源,而无需将用户名和密码提供给第三方平台。这个协议的主要作用就是定义了一个标准协议,允许一个Web或APP在用户授权下访问用户的隐私数据而无须了解用户的账号信息,这些数据可以存储在诸如微信、支付宝中。Spring Security For OAuth 2.0为OAuth2.0的软件实现提供了一个开源Java库,广泛用于基于Spring框架的Web站点上,与Spring Security框架无缝衔接,易于Web后端服务器的升级,简化了基于Web的OAuth2.0协议的开发。文中分析了OAuth2.0协议细则以及关键流程,重点阐述了Spring Security For OAuth 2.0的优点、应用以及服务器配置,并以此为基础快速构建OAuth2.0服务器软件平台。该协议库具有易于使用、易于维护与使用安全等特点,目前已经广泛应用在互联网以及金融等领域。
In challenging environment, sensory data must be stored inside the network in case of sink failures, we need to redistribute overflowing data items from the depleted storage source nodes to sensor nodes with available storage space and residual energy. We design a distributed energy efficient data storage algorithm named distributed data preservation with priority （Dzp2）. This algorithm takes both data redistribution costs and data retrieval costs into account and combines these two problems into a single problem. DZP2 can effectively realize data redistribution by using cooperative communication among sensor nodes. In order to solve the redistribution contention problem, we introduce the concept of data priority, which can avoid contention consultations between source nodes and reduce energy consumption. Finally, we verify the performance of the proposed algorithm by both theory and simulations. We demonstrate that D2p2＇s performance is close to the optimal centralized algorithm in terms of energy consumption and shows superiority in terms of data preservation time.
