I am working on a utility I call "chain" which is inspired by Karl Barrus's hopmail and related scripts. I am sending this message with the command: chain -m -s "Another chaining utility" cypherpunks@toad.com caltech jarthur extropia soda The "-m" means for chain to pipe its output into sendmail so that it is actually sent (otherwise it just writes to standard out and you have to arrange to mail it on your own). The "-s" sets the subject for the last leg of the message to the following arg. Then comes the destination address, then a list of remailer nicknames, which are just substrings of the remailers, read from an initialization file. This message is passing through four remailers. The "-m" feature is implemented only on Unix systems. On DOS you always get the output in a file and then send that however you normally would. I also have a "-e" switch which encrypts the message using a public key looked up by the destination address. Cypherpunks doesn't have a public key so that's not appropriate here. But if I wanted to send an encrypted note to, say, Phil Zimmermann, I could just do: chain -em prz@sage.cgd.ucar.edu portal mead Hi, Phil, give me a call when you have a chance -- Hal ^D and it would go via the Portal and Mead remailers, encrypted at each step, and finally to Phil, encrypted with his public key. Pretty easy. I couldn't get Karl's hopmail.bat to run on my PC (not enough environment space?) so I wrote this in C and it works OK. I'll be sending the code to Eric to be archived in a few days. If anyone has any wish lists for features I will be glad to try adding them. (I am composing this on a Unix system in order to demonstrate the -m switch, so I can't cleartext sign as I normally would. I am in the vi editor and I am sending the message with "1G!G", which tells vi to pipe the whole file into a command, followed by the "chain" command line above, verbatim. That's all there is to it.) Hal Finney 74076.1041@compuserve.com
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nobody@soda.berkeley.edu