Administration: servers, and in particular software, requires continuous upkeep such as installation of security patches, upgrade of the OS and middleware, user account management and so on.

管理：服务器和某些软件需要连续维护，比如安装安全补丁、升级操作系统和中间件、用户账号管理等等。

youdao

As an EJB, the Singleton has access to the standard set of EJB middleware services - transaction management, security, remoteing, dependency injection and so on.

作为一个EJB，该单例可以访问标准的EJB中间件服务集——事务管理、安全、远程、依赖注入等等。

youdao

Distributed applications typically use middleware servers to leverage the system services such as transaction, security, and pooling.

典型的分布式应用会通过中间件服务器调用一些系统服务，例如事务、安全以及缓冲池等。

youdao

In hybrid form, a private cloud can include data stored on premise or off, with a private Platform-as-a-Service middleware layer managing application data and enforcing data security.

FORBES: The Data Protection And Security Case For Private Clouds