X-Git-Url: https://git.distorted.org.uk/~mdw/tripe/blobdiff_plain/1a0b1e9f13b9c46de6b5bc6bfe43da1c489e199e..b86e6f3fab7736f9f70131be1c48434d377a4ae0:/server/tripe.8.in

diff --git a/server/tripe.8.in b/server/tripe.8.in
index 439cc206..33f07b52 100644
--- a/server/tripe.8.in
+++ b/server/tripe.8.in
@@ -279,40 +279,11 @@ below for the list of options.
 The
 .B tripe
 server uses Diffie\(en\&Hellman key exchange to agree the symmetric keys
-used for bulk data transfer.  Currently
-.B tripe
-can do Diffie\(en\&Hellman in two different kinds of cyclic groups:
-.I "Schnorr groups"
-(denoted
-.BR dh )
-and
-.I "elliptic curve groups"
-(denoted
-.BR ec ).
-.PP
-A Schnorr group is a prime-order subgroup of the multiplicative group of
-a finite field; this is the usual
-.I g\*(ssx\*(se
-mod
-.I p
-kind of Diffie\(en\&Hellman.  An elliptic curve group is a prime-order
-subgroup of the abelian group of
-.BR K -rational
-points on an elliptic curve defined over a finite field
-.BR K .
-.PP
-Given current public knowledge, elliptic curves can provide similar or
-better security to systems based on integer discrete log problems,
-faster, and with less transmitted data.  It's a matter of controversy
-whether this will continue to be the case.  The author uses elliptic
-curves.
+used for bulk data transfer.
 .PP
 The server works out which it should be doing based on the key's
 .B kx-group
-attribute, which should be either
-.B dh
-or
-.BR ec .
+attribute.
 If this attribute isn't present, then the key's type is examined: if
 it's of the form
 .BI tripe\- group
@@ -321,6 +292,18 @@ then the
 is used.  If no group is specified,
 .B dh
 is used as a fallback.
+The following groups are defined.
+.TP
+.B dh
+.RS
+Use traditional Diffie\(enHellman in a
+.IR "Schnorr group" :
+a prime-order subgroup of the multiplicative group of
+a finite field; this is the usual
+.I g\*(ssx\*(se
+mod
+.I p
+kind of Diffie\(en\&Hellman.
 .PP
 To create usual Schnorr-group keys, say something like
 .VS
@@ -332,6 +315,24 @@ to construct a parameters key; and create the private keys by
 key add \-adh \-pparam \-talice \e
 	\-e"now + 1 year" tripe
 .VE
+.RE
+.sv -1
+.TP
+.B ec
+.RS
+Use elliptic curve Diffie\(enHellman.
+An elliptic curve group is a prime-order
+subgroup of the abelian group of
+.BR K -rational
+points on an elliptic curve defined over a finite field
+.BR K .
+.PP
+Given current public knowledge, elliptic curves can provide similar or
+better security to systems based on integer discrete log problems,
+faster, and with less transmitted data.  It's a matter of controversy
+whether this will continue to be the case.  The author uses elliptic
+curves.
+.PP
 To create elliptic curve keys, say something like
 .VS
 key add \-aec\-param \-Cnist-p256 \-eforever \e
@@ -347,6 +348,7 @@ for details); and create the private keys by
 key add \-aec \-pparam \-talice \e
 	\-e"now + 1 year" tripe
 .VE
+.RE
 Note that the
 .BR tripe-keys (8)
 program provides a rather more convenient means for generating and