Keyed Content and Conditional Key Release
If you sell access to a piece of content online, you either trust a server to keep hiding it forever, or you rely on an app just refusing to show the "restricted" part while the actual data sits in plain sight for anyone who looks. Buyers can't check what they're getting before they pay, and once the seller or platform disappears, so does access. This describes a way to encrypt the content once, publish it openly, and hand out the unlocking key only to people who actually paid or qualify, so access outlives the platform and can be checked in advance.
Crumbs, Ty Everett +12026