Corda 节点是仅向参与者节点发送消息（状态更改/健康检查）还是向 network/zone 的所有节点发送消息？
Does Corda node send messages (state change/ health check) to only the participant nodes or to all nodes of the network/zone?
Corda 节点是只向参与节点发送消息还是向 network/zone 的所有节点发送消息？
交易仅在参与者（以及有意添加到交易中的外部观察者）之间共享。来自 Corda 白皮书（可从 here 下载）：
A transaction between a group of parties is visible only to them, and
to those whose own view of the ledger in the future may depend on verifying
the validity of this transaction. [...] The foundational object in our concept is a state object, which is a digital document which records the existence, content and current state of an agreement between two or more parties. It is intended to be shared only with those who have a legitimate reason to see it.
来自 Corda training 文档：
According to R3, "On the grounds of confidentiality, we reject the notion that data should be broadcast to all participants or cumbersome pre-defined groups." Corda communications are peer-to-peer on a "need-to-know" basis without broadcast. Need-to-know is quite different from Ethereum's public broadcast, Quorum's private transactions or Hyperledger Fabric's network "channels" approach. In a Corda network, if Alice transacts with Bob, then only Alice and Bob need to know about it, and possibly a regulator.
Corda 节点是只向参与节点发送消息还是向 network/zone 的所有节点发送消息？
交易仅在参与者（以及有意添加到交易中的外部观察者）之间共享。来自 Corda 白皮书（可从 here 下载）：
A transaction between a group of parties is visible only to them, and to those whose own view of the ledger in the future may depend on verifying the validity of this transaction. [...] The foundational object in our concept is a state object, which is a digital document which records the existence, content and current state of an agreement between two or more parties. It is intended to be shared only with those who have a legitimate reason to see it.
来自 Corda training 文档：
According to R3, "On the grounds of confidentiality, we reject the notion that data should be broadcast to all participants or cumbersome pre-defined groups." Corda communications are peer-to-peer on a "need-to-know" basis without broadcast. Need-to-know is quite different from Ethereum's public broadcast, Quorum's private transactions or Hyperledger Fabric's network "channels" approach. In a Corda network, if Alice transacts with Bob, then only Alice and Bob need to know about it, and possibly a regulator.