trunk/Mix2.0/mix.help

Subject: Instructions for using anonymous remailer

This message is being sent to you automatically in response to the message
you sent to remailer@nately.ucsd.edu with subject "remailer-help".
This help file is a barely modified version of the help file written by
Matthew Ghio.

This file describes how to use this remailer as a type 1 remailer.
It is capable of providing a much higher level of security if
you use the correct software to produce the messages.
This software is available from ftp://nately.ucsd.edu/pub/remail
Read the README file for instructions. This file is export restricted,
so it can not be retrieved directly.

I have an automated mail handling program installed on my account
mixmaster@nately.ucsd.edu which will take any message with the proper headers
and automatically re-send it anonymously.  You can use this by sending a message
to mixmaster@nately.ucsd.edu, with the header Anon-To: <address>, the address
that you want to send anonymously to.  If you can't add headers to your mail,
you can place two colons on the first line of your message, and then the Anon-To
line.  Follow that with a blank line, and then begin your message.
For Example:

> From: joe@site.com
> To: mixmaster@nately.ucsd.edu
> Subject: Anonymous Mail
>
> ::
> Anon-To: beth@univ.edu
>
> This is some anonymous mail.

The above would be delivered to beth@univ.edu anonymously.  All headers in
the original message are removed, with the exception of the Subject (and
Content-Type, if present).  She would not know that it came from Joe, nor
would she be able to reply to the message.  However, there are a few ways
that the true identity of the sender could be found.  First, if many
anonymous messages were sent, someone could compare the times that the
messages were sent with the times that 'joe' was logged in.  However, this
can be prevented by instructing the remailer to delay the message, by using
the Latent-Time header:

> From: joe@site.com
> To: mixmaster@nately.ucsd.edu
> Subject: Anonymous Mail
>
> ::
> Anon-To: beth@univ.edu
> Latent-Time: +1:00
>
> This is some anonymous mail.

The message would be delayed one hour from when it is sent.

This remailer also holds all incoming messages in a pool. Once every 10  min,
the remailer checks to see if new messages have arrived. If so, random
messages are selected from the pool and sent on, leaving the pool the origonal
size (at this time, five messages). This provides reordering, generaly thought
to be more reliable than latency alone.

Another problem is that some mailers automatically insert a signature file.
Of course, this usually contains the senders email address, and so would
reveal their identity.  The remailer software can be instructed to remove
a signature file with the header "Cutmarks".  Any line beginning with the
same text at in the cutmarks header, and any lines following it will be
removed.

> From: sender@origin.com
> To: mixmaster@nately.ucsd.edu
> Subject: Anonymous Mail
>
> ::
> Anon-To: recipient@destination.com
> Cutmarks: --
>
> This line of text will be in the anonymous message.
> --
> This line of text will not be in the anonymous message.

The remailer can also be used to make posts to usenet.  To do this, use
Anon-Post-To.  Non-Anonymous posts can be made by using Post-To.


> From: poster@origin.com
> To: mixmaster@nately.ucsd.edu
> Subject: Anonymous Post
>
> ::
> Anon-Post-To: alt.test
>
> This is an anonymous message

You can add additional headers to the output message by preceeding them
with ##

> From: chris@nifty.org
> To: mixmaster@nately.ucsd.edu
> Subject: Nifty Anon Msg
>
> ::
> Anon-To: andrew@where-ever.org
>
> ##
> Reply-To: acs-314159@chop.ucsd.edu
>
> A Message with a reply address.

For added security, you can encrypt your messages to the remailer with PGP.
The remailer software will decrypt the message and send it on.  Here is the
remailer's public key:


-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: 2.6

mQBNAy7MYUgAAAECAKennY9a57JPJZMFpD0G90iXaZRPNNxgtbKcJR//KByvyI/7
hIGI8WMpReHIu6diP4FxsCXjzE+5idqkz6eP42EABRG0Lk1peG1hc3RlciByZW1h
aWxlciA8bWl4bWFzdGVyQG5hdGVseS51Y3NkLmVkdT4=
=KlNO
-----END PGP PUBLIC KEY BLOCK-----

To utilize this feature, create a message with two colons on the first line,
then the Anon-To line, then any other headers, such as cutmarks or latency,
then a blank line, and then the message.  Encrypt this with the remailer's
public key.  Then send it to the remailer, adding the header "Encrypted: PGP".
If you forget this, the remailer won't know that it needs to be decrypted.

> To: mixmaster@nately.ucsd.edu
> From: me@mysite.org
>
> ::
> Encrypted: PGP
>
> -----BEGIN PGP MESSAGE-----
> Version: 2.3a
>
> hIkCuMeAjnwmCTUBA+dfWcFk/fLRpm4ZM7A23iONxkOGDL6D0FyRi/r0P8+pH2gf
> HAi4+1BHUhXDCW2LfLfay5JwHBNMtcdbgXiQVXIm0cHM0zgf9hBroIM9W+B2Z07i
> 6UN3BDhiTSJBCTZUGQ7DrkltbgoyRhNTgrzQRR8FSQQXSo/cf4po0vCezKYAAABP
> smG6rgPhdtWlynKSZR6Gd2W3S/5pa+Qd+OD2nN1TWepINgjXVHrCt0kLOY6nVFNQ
> U7lPLDihXw/+PPJclxwvUeCSygmP+peB1lPrhSiAVA==
> =da+F
> -----END PGP MESSAGE-----

Any unencrypted text after the PGP message is also remailed.  This is to allow
sending to someone who is anonymous.  If you create a PGP-encrypted message to
yourself via my remailer, and then you give it to someone, they can send you a
message by sending the encrypted message to the remailer.  The remailer will
then decrypt it and send it to you.  The message gets anonymized in the
process, so the sender will need to include a return address if he wants a
reply.

Remailers can be chained together for additional security.
If you have PGP installed on your machine, you can use my remailer
chaining script (which you can get from http://nately.ucsd.edu/~loki/Welcome.html)
to rout your mail through several remailers, encrypting the message to each one
on the way (if it supports PGP).

Traffic is important to the security of remailers.  To make traffic analysis
more difficult, this remailer will accept messages to be trashed. Any
message asking to be remailed to null will be trashed.

> From: chris@nifty.org
> To: mixmaster@nately.ucsd.edu
> Subject: Trash this
>
> ::
> Anon-To: null
>
> Random junk

This can (and probably should) be sent encrypted with PGP. Using the 
"Encrpyted: PGP" command

Abuse Policy:
I consider the following to be inappropriate use of this anonymous remailer,
and will take steps to prevent anyone from doing any of the following:
- Sending messages intended primarilly to be harassing or annoying.
- Use of the remailer for any illegal purpose.
If you don't want to receive anonymous mail, send me a message, and I will
add your email address to the block list.

You can get a list of statistics on remailer usage by sending mail to
mixmaster@nately.ucsd.edu with Subject: remailer-stats


1	rabbi	200	Subject: Instructions for using anonymous remailer
2
3			This message is being sent to you automatically in response to the message
4			you sent to remailer@nately.ucsd.edu with subject "remailer-help".
5			This help file is a barely modified version of the help file written by
6			Matthew Ghio.
7
8			This file describes how to use this remailer as a type 1 remailer.
9			It is capable of providing a much higher level of security if
10			you use the correct software to produce the messages.
11			This software is available from ftp://nately.ucsd.edu/pub/remail
12			Read the README file for instructions. This file is export restricted,
13			so it can not be retrieved directly.
14
15			I have an automated mail handling program installed on my account
16			mixmaster@nately.ucsd.edu which will take any message with the proper headers
17			and automatically re-send it anonymously. You can use this by sending a message
18			to mixmaster@nately.ucsd.edu, with the header Anon-To: <address>, the address
19			that you want to send anonymously to. If you can't add headers to your mail,
20			you can place two colons on the first line of your message, and then the Anon-To
21			line. Follow that with a blank line, and then begin your message.
22			For Example:
23
24			> From: joe@site.com
25			> To: mixmaster@nately.ucsd.edu
26			> Subject: Anonymous Mail
27			>
28			> ::
29			> Anon-To: beth@univ.edu
30			>
31			> This is some anonymous mail.
32
33			The above would be delivered to beth@univ.edu anonymously. All headers in
34			the original message are removed, with the exception of the Subject (and
35			Content-Type, if present). She would not know that it came from Joe, nor
36			would she be able to reply to the message. However, there are a few ways
37			that the true identity of the sender could be found. First, if many
38			anonymous messages were sent, someone could compare the times that the
39			messages were sent with the times that 'joe' was logged in. However, this
40			can be prevented by instructing the remailer to delay the message, by using
41			the Latent-Time header:
42
43			> From: joe@site.com
44			> To: mixmaster@nately.ucsd.edu
45			> Subject: Anonymous Mail
46			>
47			> ::
48			> Anon-To: beth@univ.edu
49			> Latent-Time: +1:00
50			>
51			> This is some anonymous mail.
52
53			The message would be delayed one hour from when it is sent.
54
55			This remailer also holds all incoming messages in a pool. Once every 10 min,
56			the remailer checks to see if new messages have arrived. If so, random
57			messages are selected from the pool and sent on, leaving the pool the origonal
58			size (at this time, five messages). This provides reordering, generaly thought
59			to be more reliable than latency alone.
60
61			Another problem is that some mailers automatically insert a signature file.
62			Of course, this usually contains the senders email address, and so would
63			reveal their identity. The remailer software can be instructed to remove
64			a signature file with the header "Cutmarks". Any line beginning with the
65			same text at in the cutmarks header, and any lines following it will be
66			removed.
67
68			> From: sender@origin.com
69			> To: mixmaster@nately.ucsd.edu
70			> Subject: Anonymous Mail
71			>
72			> ::
73			> Anon-To: recipient@destination.com
74			> Cutmarks: --
75			>
76			> This line of text will be in the anonymous message.
77			> --
78			> This line of text will not be in the anonymous message.
79
80			The remailer can also be used to make posts to usenet. To do this, use
81			Anon-Post-To. Non-Anonymous posts can be made by using Post-To.
82
83
84			> From: poster@origin.com
85			> To: mixmaster@nately.ucsd.edu
86			> Subject: Anonymous Post
87			>
88			> ::
89			> Anon-Post-To: alt.test
90			>
91			> This is an anonymous message
92
93			You can add additional headers to the output message by preceeding them
94			with ##
95
96			> From: chris@nifty.org
97			> To: mixmaster@nately.ucsd.edu
98			> Subject: Nifty Anon Msg
99			>
100			> ::
101			> Anon-To: andrew@where-ever.org
102			>
103			> ##
104			> Reply-To: acs-314159@chop.ucsd.edu
105			>
106			> A Message with a reply address.
107
108			For added security, you can encrypt your messages to the remailer with PGP.
109			The remailer software will decrypt the message and send it on. Here is the
110			remailer's public key:
111
112
113			-----BEGIN PGP PUBLIC KEY BLOCK-----
114			Version: 2.6
115
116			mQBNAy7MYUgAAAECAKennY9a57JPJZMFpD0G90iXaZRPNNxgtbKcJR//KByvyI/7
117			hIGI8WMpReHIu6diP4FxsCXjzE+5idqkz6eP42EABRG0Lk1peG1hc3RlciByZW1h
118			aWxlciA8bWl4bWFzdGVyQG5hdGVseS51Y3NkLmVkdT4=
119			=KlNO
120			-----END PGP PUBLIC KEY BLOCK-----
121
122			To utilize this feature, create a message with two colons on the first line,
123			then the Anon-To line, then any other headers, such as cutmarks or latency,
124			then a blank line, and then the message. Encrypt this with the remailer's
125			public key. Then send it to the remailer, adding the header "Encrypted: PGP".
126			If you forget this, the remailer won't know that it needs to be decrypted.
127
128			> To: mixmaster@nately.ucsd.edu
129			> From: me@mysite.org
130			>
131			> ::
132			> Encrypted: PGP
133			>
134			> -----BEGIN PGP MESSAGE-----
135			> Version: 2.3a
136			>
137			> hIkCuMeAjnwmCTUBA+dfWcFk/fLRpm4ZM7A23iONxkOGDL6D0FyRi/r0P8+pH2gf
138			> HAi4+1BHUhXDCW2LfLfay5JwHBNMtcdbgXiQVXIm0cHM0zgf9hBroIM9W+B2Z07i
139			> 6UN3BDhiTSJBCTZUGQ7DrkltbgoyRhNTgrzQRR8FSQQXSo/cf4po0vCezKYAAABP
140			> smG6rgPhdtWlynKSZR6Gd2W3S/5pa+Qd+OD2nN1TWepINgjXVHrCt0kLOY6nVFNQ
141			> U7lPLDihXw/+PPJclxwvUeCSygmP+peB1lPrhSiAVA==
142			> =da+F
143			> -----END PGP MESSAGE-----
144
145			Any unencrypted text after the PGP message is also remailed. This is to allow
146			sending to someone who is anonymous. If you create a PGP-encrypted message to
147			yourself via my remailer, and then you give it to someone, they can send you a
148			message by sending the encrypted message to the remailer. The remailer will
149			then decrypt it and send it to you. The message gets anonymized in the
150			process, so the sender will need to include a return address if he wants a
151			reply.
152
153			Remailers can be chained together for additional security.
154			If you have PGP installed on your machine, you can use my remailer
155			chaining script (which you can get from http://nately.ucsd.edu/~loki/Welcome.html)
156			to rout your mail through several remailers, encrypting the message to each one
157			on the way (if it supports PGP).
158
159			Traffic is important to the security of remailers. To make traffic analysis
160			more difficult, this remailer will accept messages to be trashed. Any
161			message asking to be remailed to null will be trashed.
162
163			> From: chris@nifty.org
164			> To: mixmaster@nately.ucsd.edu
165			> Subject: Trash this
166			>
167			> ::
168			> Anon-To: null
169			>
170			> Random junk
171
172			This can (and probably should) be sent encrypted with PGP. Using the
173			"Encrpyted: PGP" command
174
175			Abuse Policy:
176			I consider the following to be inappropriate use of this anonymous remailer,
177			and will take steps to prevent anyone from doing any of the following:
178			- Sending messages intended primarilly to be harassing or annoying.
179			- Use of the remailer for any illegal purpose.
180			If you don't want to receive anonymous mail, send me a message, and I will
181			add your email address to the block list.
182
183			You can get a list of statistics on remailer usage by sending mail to
184			mixmaster@nately.ucsd.edu with Subject: remailer-stats
185
186