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authorChristian Grothoff <christian@grothoff.org>2019-04-20 21:45:25 +0200
committerChristian Grothoff <christian@grothoff.org>2019-04-20 21:45:25 +0200
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tree1e439c5054194faef2f52a86f16a7c13f5f5aa20 /doc/man/gnunet-search.1
parent5fab02b10baef639121723aacf3b1351e5db8003 (diff)
downloadgnunet-32485c3b58983ada1943b3fa27eac3b0cff2a9da.tar.gz
gnunet-32485c3b58983ada1943b3fa27eac3b0cff2a9da.zip
try to address #5660:
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@@ -24,30 +24,25 @@ Search for content on GNUnet.
24The keywords are case-sensitive. 24The keywords are case-sensitive.
25.Nm 25.Nm
26can be used both for a search in the global namespace as well as for searching a private subspace. 26can be used both for a search in the global namespace as well as for searching a private subspace.
27.Sh OPTIONS
27.Bl -tag -width Ds 28.Bl -tag -width Ds
28.It Fl a Ar LEVEL | Fl \-anonymity= Ns Ar LEVEL 29.It Fl a Ar LEVEL | Fl \-anonymity= Ns Ar LEVEL
29The \fB\-a\fR option can be used to specify additional anonymity constraints. 30This option can be used to specify additional anonymity constraints. The default is 1.
30If set to 0, GNUnet will try to download the file as fast as possible, including using non-anonymous methods. 31If 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.
32This will allow other users to download the file as fast as possible, including using non-anonymous methods (discovery via DHT and CADET transfer).
31If you set it to 1 (default), you use the standard anonymous routing algorithm (which does not explicitly leak your identity). 33If you set it to 1 (default), you use the standard anonymous routing algorithm (which does not explicitly leak your identity).
32However, a powerful adversary may still be able to perform traffic analysis (statistics) to over time infer data about your identity. 34However, a powerful adversary may still be able to perform traffic analysis (statistics) to over time discovery your identity.
33You 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. 35You can gain better privacy by specifying a higher level of anonymity (using values above 1).
34Note 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. 36This tells FS that it must hide your own requests in equivalent\-looking cover traffic.
35So 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. 37This should confound an adversaries traffic analysis, increasing the time and effort it would
36Also, peers that cache content in the network always use anonymity level 1. 38take to discover your identity. However, it also can significantly reduce performance, as
37.sp 39your requests will be delayed until sufficient cover traffic is available. The specific
38This option can be used to limit requests further than that. 40numeric value (for anonymity levels above 1) is simple:
39In particular, you can require GNUnet to receive certain amounts of traffic from other peers before sending your queries. 41Given an anonymity level L (above 1), each request FS makes on your behalf must be hidden in L\-1 equivalent
40This way, you can gain very high levels of anonymity \- at the expense of much more traffic and much higher latency. 42requests of cover traffic (traffic your peer routes for others) in the same time\-period.
41So set it only if you really believe you need it. 43The time\-period is twice the average delay by which GNUnet artificially delays traffic.
42.sp 44Note that regardless of the anonymity level you choose, peers that cache content in the
43The definition of ANONYMITY\-RECEIVE is the following. 45network always use anonymity level 1.
440 means no anonymity is required.
45Otherwise 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.
46Thus, 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.
47The time\-period is twice the average delay that GNUnet defers forwarded queries.
48.sp
49The default is 1 and this should be fine for most users.
50Also 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.
51.It Fl c Ar FILENAME | Fl \-config= Ns Ar FILENAME 46.It Fl c Ar FILENAME | Fl \-config= Ns Ar FILENAME
52use config file (defaults: ~/.config/gnunet.conf) 47use config file (defaults: ~/.config/gnunet.conf)
53.It Fl h | \-help 48.It Fl h | \-help