- removed hyphen in RFC-7748 in abstract

- added why Timmy's work also is interesting if you are not
interested in math but only in crypto (it's a sanity check
on our formalization of the RFC)

paper/0_abstract.tex

@@ -2,7 +2,7 @@
 \begin{abstract}
 
   Based on a formal definition of the X25519 key exchange protocol
-  from Bernstein's 2006 paper, as standardized in RFC-7748,
+  from Bernstein's 2006 paper, as standardized in RFC 7748,
   we formally prove that the C implementation of
   this protocol in the TweetNaCl library is
   correct and free from all undefined behaviors, like arithmetic overflows

paper/1_intro.tex

@@ -45,6 +45,8 @@ of an asymmetric cryptographic primitive.
 
 In the last step we prove that the Coq implementation matches
 the mathematical definition of X25519 as given in~\cite[Sec.~2]{Ber06}.
+This is important as a check that there are no transcription errors
+in our formal version of the X25519 definition.
 We do this by extending the Coq library
 for elliptic curves~\cite{BartziaS14} by Bartzia and Strub to
 support Montgomery curves, and in particular Curve25519.