This allows the design of an application to focus on the component parts, and hand off messages to the communication layer for delivery.

这使得在设计应用的时候，可以只关注于组件部分，而把消息传递给通信层去递送。

youdao

The MIT mathematicians, that is, sidestepped a weak spot that had plagued cryptographers ever since the days of the ancient Greeks: How do sender and receiver hand off a key without risking that their communication channel or their courier will be compromised in some way?

FORBES: I've got a secret