1 files changed, 16 insertions, 27 deletions

diff --git a/doc/man/gnunet-download.1 b/doc/man/gnunet-download.1
index e2c4ab365..f278694c3 100644
--- a/doc/man/gnunet-download.1
+++ b/doc/man/gnunet-download.1
@@ -24,8 +24,22 @@ a command line interface for downloading files from GNUnet
 Download files from GNUnet.
 .Bl -tag -width Ds
 .It Fl a Ar LEVEL | Fl \-anonymity= Ns Ar LEVEL
-Set desired level of receiver anonymity.
-Default is 1.
+This option can be used to specify additional anonymity constraints. The default is 1.
+If set to 0, GNUnet will publish the file non-anonymously and in fact sign the advertisement for the file using your peer's private key.
+This will allow other users to download the file as fast as possible, including using non-anonymous methods (discovery via DHT and CADET transfer).
+If you set it to 1 (default), you use the standard anonymous routing algorithm (which does not explicitly leak your identity).
+However, a powerful adversary may still be able to perform traffic analysis (statistics) to over time discovery your identity.
+You can gain better privacy by specifying a higher level of anonymity (using values above 1).
+This tells FS that it must hide your own requests in equivalent\-looking cover traffic.
+This should confound an adversaries traffic analysis, increasing the time and effort it would
+take to discover your identity. However, it also can significantly reduce performance, as
+your requests will be delayed until sufficient cover traffic is available.  The specific
+numeric value (for anonymity levels above 1) is simple:
+Given an anonymity level L (above 1), each request FS makes on your behalf must be hidden in L-1 equivalent
+requests of cover traffic (traffic your peer routes for others) in the same time\-period.
+The time\-period is twice the average delay by which GNUnet artificially delays traffic.
+Note that regardless of the anonymity level you choose, peers that cache content in the
+network always use anonymity level 1.
 .It Fl c Ar FILENAME | Fl \-config= Ns Ar FILENAME
 Use config file (default:
 .Pa ~/.config/gnunet.conf Ns )
@@ -88,31 +102,6 @@ If you ever have to abort a download, you can at any time continue it by re-issu
 In that case GNUnet will not download blocks again that are already present.
 GNUnet's file-encoding will ensure file integrity, even if the existing file was not downloaded from GNUnet in the first place.
 Temporary information will be appended to the target file until the download is completed.
-.Ss SETTING ANONYMITY LEVEL
-The
-.Fl a
-option can be used to specify additional anonymity constraints.
-If set to 0, GNUnet will try to download the file as fast as possible, including using non-anonymous methods.
-If you set it to 1 (default), you use the standard anonymous routing algorithm (which does not explicitly leak your identity).
-However, a powerful adversary may still be able to perform traffic analysis (statistics) to over time infer data about your identity.
-You can gain better privacy by specifying a higher level of anonymity, which increases the amount of cover traffic your own traffic will get, at the expense of performance.
-Note that your download performance is not only determined by your own anonymity level, but also by the anonymity level of the peers publishing the file.
-So even if you download with anonymity level 0, the peers publishing the data might be sharing with a higher anonymity level, which in this case will determine performance.
-Also, peers that cache content in the network always use anonymity level 1.
-.Pp
-This option can be used to limit requests further than that.
-In particular, you can require GNUnet to receive certain amounts of traffic from other peers before sending your queries.
-This way, you can gain very high levels of anonymity - at the expense of much more traffic and much higher latency.
-So set it only if you really believe you need it.
-.Pp
-The definition of ANONYMITY\-RECEIVE is the following.
-0 means no anonymity is required.
-Otherwise a value of 'v' means that 1 out of v bytes of "anonymous" traffic can be from the local user, leaving 'v-1' bytes of cover traffic per byte on the wire.
-Thus, if GNUnet routes n bytes of messages from foreign peers (using anonymous routing), it may originate n/(v-1) bytes of queries in the same time\-period.
-The time\-period is twice the average delay that GNUnet defers forwarded queries.
-.Pp
-The default is 1 and this should be fine for most users.
-Also notice that if you choose very large values, you may end up having no throughput at all, especially if many of your fellow GNUnet\-peers all do the same.
 .Sh FILES
 .Pa ~/.config/gnunet.conf
 GNUnet configuration file