1) Summarize Mykletun paper in a few bullets/sentences.

2) Summarize Laurie paper in a few bullets/sentences.

3) Suppose we want to support lookups into an outsourced database,
and we use a Merkle tree as in the Mykletun paper.  Suppose instead
of a balanced tree we use a degenerate tree like this:

      *
     / \
    *   *
   / \
  *   *
 / \
..  *

i.e., each internal node has two children, at least one of which
is a leaf.  What disadvantage(s) would this have, compared to using
a balanced tree?