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Add signatures #21

Merged
merged 3 commits into from
Feb 24, 2018
Merged

Add signatures #21

merged 3 commits into from
Feb 24, 2018

Commits on Feb 24, 2018

  1. Rename UserDataKey to Discovery 

    From the perspective of the log, when some data's hash is added,
that data is "discovered" by the historian.  Another event
might be a "claim" that some signed data belongs to the owner of a
public key.
    @garious
    garious committed Feb 24, 2018
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  2. Extend the event log with a Claim event to claim possession 

    Unlike a Discovery event, a Claim event associates a public key
with a hash. It's intended to to be used to claim ownership of
some hashable data. For example, a graphic designer could claim
copyright by hashing some image they created, signing it with
their private key, and publishing the hash-signature pair via
the historian. If someone else tries to claim it as their own,
the designer can point to the historian's log as cryptographically
secure evidence that the designer's copy existed before anyone
else's.

Note there's nothing here that verifies the first claim is the actual
content owner, only that the first claim almost certainly happened
before a second.
    @garious
    garious committed Feb 24, 2018
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  3. Test bad signature

    @garious
    garious committed Feb 24, 2018
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