My original goal was to restore Ren-C networking functionality to the way it worked prior to TLS 1.2. I'll need others with deeper familarity with protocols to decide if there are worthy side-goals that can be met for this bounty.
Per Brian Otto's previous comments, it would be great to also pick-up SFTP / SCP if those are along the same route.
I don't think we want to regress the networking functionality!
Basically websites have moved to TLS 1.1 or 1.2 and Rebol networking is only sitting at 1.0 with mostly obsolete cipher suites.
We can do FTPS easily enough which is FTP over SSL but SFTP is FTP over SSH which is a different protocol altogether and would require someone to write the SSH in Rebol.
Anyway, we do need an indication of how much, if anything, people are willing to contribute to this bounty before I approach Cyphre again. I presume his estimate was in USD and not Koruna!
Count me in up to 50% assuming a $2k cap. I can adjust depending if there are other contributors, or if there are additional features we can get into the deliverables.