In a public-key system, for instance, if Zooey wants to send Franny an encrypted message, Franny would first send Zooey her public Key.

• 在公开钥匙系统中，举例来看，如果佐伊要向弗兰妮发送加密的报文，弗兰妮首先向佐伊发送他的公开钥匙。