clarify S_X

1 files changed, 4 insertions, 3 deletions

diff --git a/doc/paper/taler.tex b/doc/paper/taler.tex
index 76bceca22..ce40fd948 100644
--- a/doc/paper/taler.tex
+++ b/doc/paper/taler.tex
@@ -836,9 +836,10 @@ purposes.  The exchange's bank transfers dealing in traditional currency
 are expected to be recorded for tax authorities to ensure taxability.
 % FIXME: Auditor?
 
-$S_K$ denotes RSA signing with denomination key $K$ and EdDSA~\cite{eddsa,rfc8032}
-over elliptic curve $\mathbb{E}$ for other types of keys.
-$G$ denotes the generator of elliptic curve $\mathbb{E}$.
+$S_K$ denotes RSA signing with denomination key $K$.  Signatures $S_X$
+use EdDSA~\cite{eddsa,rfc8032} over elliptic curve $\mathbb{E}$ for
+all other types of keys $X \not= K$.  $G$ denotes the generator of
+elliptic curve $\mathbb{E}$.
 
 \subsection{Withdrawal}