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national do-not-spam list

national do-not-spam list

Posted Nov 26, 2003 19:21 UTC (Wed) by skybrian (subscriber, #365)
Parent article: The CAN-SPAM bill examined

A national do-not-spam list might actually be somewhat useful, but not for ordinary users. Instead, ISP's and spam fighters could put dummy email addresses on this list and use it to more easily detect spammers.

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national do-not-spam list

Posted Nov 27, 2003 11:26 UTC (Thu) by rwmj (guest, #5474) [Link]

This is one way to do it.

Another way is to have the FTC (or whichever *trusted* body administrates this) either cleanse lists on behalf of spammers, or give spammers MD5 hashes of the addresses.

The hashing approach is the most interesting: to test an address, you MD5 hash it and look for it on the list of hashes. Reversing this process is mathematically very difficult, so given a list of hashes a spammer cannot derive a list of addresses.


national do-not-spam list

Posted Dec 5, 2003 4:24 UTC (Fri) by khim (subscriber, #9252) [Link]

*Trusted* body ? What the hell ? Why you even need any trusted body ?

It's possible to create 1000 lists with untrusted bodies (including one nationa-wide) where only md5 hashes are stored. Generated locally, obviously. With 100% open-sourced program.

Then anyone can use any such database to check is address if there but nobody can harvest anything from there: e-mail adresses were never actually submitted to such databases!

Nobody can misuse information they do not have in first place - this eliminates needs for trust...

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