Can access to an Asset (e.g. stored file) be permission-ed by public/private key

Question

Assuming multiple users have access a permission-ed (private enterprise) Multichain BC, can access to individual files stored in the BC (or accessed from external storage via a key stored in the BC) be controlled at the user level (public or private key level for example)?

Answer 1

Currently you need to handle this via encryption, where the data on the chain is encrypted and only readable by certain participants who have access to the decryption key. See this tutorial for an example of how to handle this entire process over the chain itself:

https://www.multichain.com/developers/stream-confidentiality/

We have a lot of plans to make this easier in future.