ev on Nostr: Yes, you are right, it is the issue with any info. So you can encrypt a message to a ...

Yes, you are right, it is the issue with any info.

So you can encrypt a message to a pubkey, or encrypt a message to a shared key, but you cannot revoke access to that data after.

The only way around this is to link to some centralized service where the data is stored, and even then people can take photos and/or copy and paste the data.