I'm looking for the name of a concept that works as follows:
The purpose is maybe to proof ownership or otherwise proof that something was known to me in the past before it became public.
Knowing the name will enable me reading more about it.
To me this sounds like a commitment scheme:
A commitment scheme is a cryptographic primitive that allows one to commit to a chosen value (or chosen statement) while keeping it hidden to others, with the ability to reveal the committed value later
Interactions in a commitment scheme take place in two phases:
- the commit phase during which a value is chosen and committed to
- the reveal phase during which the value is revealed by the sender, then the receiver verifies its authenticity
You can see this term being used by several of the answers to this question, for example.
External links referenced by this document: