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Anonymity and YA-NewsWatcher
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1995-07-03
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Anonymity and YA-NewsWatcher
Yet Another NewsWatcher adds a new feature to NewsWatcher: transparent
support for posting via anonymous remailers. For information on
anonymous remailers, read the newsgroups alt.privacy, alt.anonymous, or
alt.privacy.anon-server. Also read the additional files that accompany
this release of Yet Another NewsWatcher (Anonymity on the Internet_FAQ,
Anonymous Remailer FAQ, List of reliable remailers, Penet anonymous
help, and Usura anonymous help). About once a week there is a post sent
to these last two groups by raph@kiwi.CS.Berkeley.EDU (Raph Levien)
titled "List of reliable remailers" which provides an overview of which
remailers are currently available. There are also two FAQ's available
at the standard FAQ sites, "Anonymity on the Internet FAQ" and
"Anonymous Remailer FAQ" which explain how remailers work, and what
legitimate purpose they serve. Anonymous remailers are an important
resource for many people on the internet who have legitimate reasons
for using them. Please learn about the remailers before using them, and
please don't abuse them. Remember that the use of a remailer is a
privilege, which should not be abused by using the remailer for illegal
or unethical purposes.
Anonymous remailers work by taking an incoming message, removing the
headers that indicate its origin, and then forwarding it to its desired
destination. They may do this in such a manner that no reply is
possible (a one way remailer), or the sender may be given an anonymous
address managed by the remailer to which replies may be sent. To create
a valid message for a remailer, the "To" line must be set to the email
address of the remailer, and various other header lines added to signal
where the email message or usenet post should be forwarded. The
anonymous remailer features in YA-NW automate this process so that it
becomes foolproof. There are several different types of remailers in
use today. Two major classes are cypherpunk and penet. The anonymous
remailer support in YA-NW works with both types of remailer.
The actual headers used in a message sent to an anonymous remailer are
not those that are displayed in the message editing window. This is
done in part to make using the remailers easier, since the necessary
headers vary from one type of remailer to another. When the "anon"
button is selected in the message window, the header lines that will
NOT be included in the message are hidden. The remaining fields (To ,
Newsgroups , etc.) will be used to compose an appropriately formatted
message. If you wish to see what the outgoing message will actually
look like, you can print the message window. This will show the message
as it will be sent, with two exceptions: the password (if required)
will be displayed as bullet characters, and the headers shown will be a
composite of the required email and post headers if both mailing and
posting are currently selected.
"Anonymity Information" in Preferences dialog.
This information is used when an anonymous remailer is used for posting
or emailing a message. The news and mail remailers are specified
separately, though they can both be set to the same email address if
desired (and if the selected remailer supports anonymous posting). The
"Penet password" line is used to enter the password to your
anon.penet.fi account. It can be left blank if you don't use the penet
remailer, or if you use penet without a password (which is not a good
idea). The "Anon Reply-To" field may be used to add an anonymous reply
address to a message that is not being sent via penet (which always
allows anonymous replies). It too can be left blank if you don't wish
to use it. It would usually be used to supply a penet anonymous reply
email address when you are using a cypherpunk one-way anonymous
remailer.
Message windows.
Message windows have a new "Use anon remailer" button. When this button
is clicked, it hides a few fields that don't make sense for anonymous
messages (such as cc, bcc, and reply to). These fields will not go in
the anon post or email. The other header lines stay the same, even
though they won't all be used as-is in the actual message. This is done
to hide the details of the actual anon remailer, which can vary
according to what kind of remailer is going to be used.
There are two classes of remailers that I believe cover the majority of
the available open remailers: penet (which is actually a confidential
remailer, since it lets people exchange messages) and cypherpunk, which
is one-way and fully blind. The headers are different for each case. So
what I do is take the information the sender entered in the "to" and
"newsgroups" fields, put this stuff in the appropriate new anon
remailer header, and replace "to" with the address of the remailer.
If you wish to see how the actual message sent to the remailer will
appear, print it. Note that, when printing a message window with the
anon button selected, if both "Send as email" and "Post as news" are
selected, the printed message will show the headers used for both the
news remailer and the mail remailer. When the message is actually sent,
only the appropriate (news or email) headers are included in the
message. When printing the message, the penet password is replaced by
bullet characters.
Note that it is not possible to mail anonymously and post
non-anonymously, or vice-versa.
You can specify a different remailer for email and posting. Selecting
the anon button means that both email and posting will go to the
appropriate remailer, if both the news and mail buttons are also
selected. As stated, penet is designed for two way communication, so
it's easy to reply to posts or email sent via penet. The other
remailers are one way, but allow extra header lines to be pasted in
(normally everything except "subject" and "content type" are stripped
by the remailer as part of the process of making the message
anonymous). So there's the option to add a reply-to field to such
messages. Presumably that would be a penet personal anon email address.
Note that NewsWatcher's "extra news headers" and "extra mail headers"
are also pasted in when using a cypherpunk remailer. This means that
they too will show up in the final anonymous email message or post.
When the penet remailer is used, these headers are positioned normally
withing among the other headers. Because penet is aggressive about
stripping out headers, they probably will NOT be included in the final
anonymous email message or post.
Finally, penet will include the References header line in anonymous
posts, so your response can be part of a thread. The Keywords and
Followup-To headers are stripped out, however. Because all three of
these headers are "pasted in" when a cypherpunk remailer is used,
they will be included in the final anonymous email message or post.