Posted by
timothy
on from the to-stem-the-tide dept.
Anon writes: "Although the use of HashCash has been featured before, Adam Back has recently (August 1st) published a paper about it, outlining many other applications for the mechanism. Quite an interesting read. It seems the guys at camram have been working on a standard for use in e-mail too."
Re:HashCash software
by
Adam+Back
·
· Score: 4, Informative
there is some library and command line tool source available at:
http://www.cypherspace.org/hashcash/source/
also there is a windows gui version and a java applet version which is kind of "clientless" for people with java browers. (The camram group are using the java version for senders who don't have a hashcash client).
http://www.cypherspace.org/hashcash/
Okay, I'll give it a shot.
by
Anonymous Coward
·
· Score: 1, Informative
In one sentence: Unlike other anti-spam initiatives, 'hashcash' places the 'cost' (in time and CPU work) of sending spam on the spammer. Most anti-spam initiatives are receiver-side solutions (filtering either local or distributed, whitelists, disposable email addresses, and so forth); 'hashcash' forces the sender of the email to demonstrate that the mail is 'worth reading' by demonstrating that they've spent a certain amount of time to perform a certain amount of CPU work specifically to send the mail to you.
Agree with you about the name, btw; it's not exactly intuitively obvious what it's supposed to do. The camram people keep using a 'postage' metaphor which I think is better. Think of it as postage for email if that helps any.
Integration w/ SpamAssassin
by
shird
·
· Score: 3, Informative
This is also currently being look at being added to SpamAssassin, the idea is;
Its not required, but if you use it, you can avoid being flagged by the filter. In effect it provides a backdoor around the filter, without the potential for abuse by spammers.
I have also being trying to get Microsoft to add this to Hotmail, as a means to 'highlight' messages which have valid tokens to avoid accidental deletion. If anyone has a good contact address for them, please reach me at;
shird:at: dstc.edu.au
Slashdot Mirror
there is some library and command line tool source available at: http://www.cypherspace.org/hashcash/source/ also there is a windows gui version and a java applet version which is kind of "clientless" for people with java browers. (The camram group are using the java version for senders who don't have a hashcash client). http://www.cypherspace.org/hashcash/
In one sentence: Unlike other anti-spam initiatives, 'hashcash' places the 'cost' (in time and CPU work) of sending spam on the spammer. Most anti-spam initiatives are receiver-side solutions (filtering either local or distributed, whitelists, disposable email addresses, and so forth); 'hashcash' forces the sender of the email to demonstrate that the mail is 'worth reading' by demonstrating that they've spent a certain amount of time to perform a certain amount of CPU work specifically to send the mail to you.
Agree with you about the name, btw; it's not exactly intuitively obvious what it's supposed to do. The camram people keep using a 'postage' metaphor which I think is better. Think of it as postage for email if that helps any.
This is also currently being look at being added to SpamAssassin, the idea is;
:at: dstc.edu.au
Its not required, but if you use it, you can avoid being flagged by the filter. In effect it provides a backdoor around the filter, without the potential for abuse by spammers.
I have also being trying to get Microsoft to add this to Hotmail, as a means to 'highlight' messages which have valid tokens to avoid accidental deletion. If anyone has a good contact address for them, please reach me at;
shird
I.O.U One Sig.