As suggested by @gmaxwell (thanks!), I tried to make clearer the benefit
of hardened keys:
* Described hardened keys as a solution in the first sentence of the
Hardened Keys subsection.
* Reordered the text so that the problem is described before the
solution, making the presence of a solution clearer.
* Added a prefatory sentence to the description of the two key
derivation formulas again describing the hardened formula as a
solution.
As suggested by @vbuterin (thanks!), I added a paragraph describing that
HD wallets don't use normal derivation on the master key so they don't
have an effective master public key. (See end of the diff.)
This is a fairly large diff because of the reordering, but no new
clauses were added besides those described above.
_includes/guide_wallets.md:
* Fix formula given for normal child key derivation to state that public
keys must also be provided to the HMAC hash function. This required
updating both text and images.
* Add one-paragraph warning about ancestor key compromise when the
ancestor extended public key is compromised along with a descended
private key. Update img/dev/en-hd-private-parent-to-private-child.*
to help illustrate this warning.
en/developer-reference.md:
* Remove %include% of previously-removed file which caused new versions
of Jekyll to die.
Thanks also (in alphabetical order) to @cbeams, @mikehearn, and
@tgeller, among others.
The last pre-squash commit was: c2b8d562aa107c7b68c60946cea14cdccc5159ad
