If a Confidential Assets carries a currency that is not Bitcoin (as mentioned in the whitepaper) how is the transfer of assets from/to the main Bitcoin blockchain handled?
Using confidential assets, viewers of a blockchain would be able to see a transaction's senders and receivers, but not what kind of asset is traded – whether bitcoin, stocks, gold, or something else.
Confidential Assets enables blockchain users to manage multiple asset types within a transaction, while encrypting both the asset types and transaction amounts between the transacting parties. This means that blockchains built with Confidential Assets can be publicly verified to be accurate, while giving parties involved in a transaction control over the privacy of their exchange, including the ability to selectively disclose the hidden asset values and types.
Confidential Assets extends powerful capabilities to users and enables new functionality to support marketplaces where trading of different blockchain assets is desired. Confidential Assets enables users to protect financial information about their transactions and commercial activity in a public blockchain.