• A)正确
• B)Fabric是许可的区块链.所有参加者是彼此已知的，并且没有匿名交互.即使无赖的同伴试图更改分类帐，以便另一个对等方需要通过状态恢复其状态的事件转移，交易必须经过相同的验证它们是从订购者那里收到的，所以没有.
• C)不确定我了解您的意思是维护.同行可以参加多个频道，因此添加频道不会增加数量的同行.这会增加分类帐的数量，因此关于，如果您正在执行备份等，那么可能有额外的运营管理开销.生活中没有什么是免费；-)

I am trying to set up a network where private transactions can be sent, but are a part of a single blockchain, such as is implemented in Quorum with the privateFor parameter when creating a contract.

I could implement a solution using channels and from reading the guides, document and whitepaper I can see that each channel owns its own blockchain. What I'm unsure about is if each channel is again apart of a larger blockchain that will contain the encrypted data of all channels or a hash of each channel when a new block is created.

I can't find any documentation of such a feature so I am assuming that each channel's blockchain is isolated entirely from the rest of the network. This leaves me with three questions.

A) Am I correct in assuming there is no "master" blockchain containing all channels?

B) If I am correct about my assumption, does this not leave channels with only two participants, or one participant if someone leaves, open for attack as someone could easily change the data stored in the ledger in this scenario?

C) If you were to implement channels for all nodes that need to send private data to one another, wouldn't this increase maintenance hugely i.e creating auditing nodes for each channel etc?

Thanks!

• A) Correct
• B) Fabric is a permissioned blockchain. All participants are known to one-another, and there are no anonymous interactions. Even if a rogue peer were to try to change the ledger such that in the event that the other peer needed to recover its state via state transfer, the transactions would have to undergo the same validation that they do when received from the orderer, so no.
• C) Not sure I understand what maintenance you mean. A peer can participate un multiple channels, so adding channels does not increase the number of peers. It would increase the number of ledgers, so in that regard, if you are performing backups etc then there may be additional operational management overhead. Nothing in life is free;-)