GnuPG支持数据和通信的加密和签名，且以一个多功能的密钥管理系统和各种公钥目录的访问模块为特色。
GnuPG allows encrypting and signing your data and communication, and features a versatile key-management system and access modules for all kinds of public key directories.
当前物流信息系统中存在着XML数据安全的问题，根据XML加密、XML数字签名和XML密钥管理规范服务（XKMS）三种核心标准，在数据交换中确保XML数据的安全。
The security problem of XML data existed in logistic information systems. The application of the XML encryption, XML data signature and XKMS insure the security of logistic information.
各子系统与安全管理中心之间的通信采用了加密、签名、认证等安全机制。
The communication between each subsystem and the security management center integrates many kinds of network security mechanisms such as encryption, signature, authentication etc.
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