[hashcash] Re: BCC problem (was: Hi!)
- From: Hubert Chan <hubert@xxxxxxxxx>
- To: hashcash@xxxxxxxxxxxxx
- Date: Fri, 26 May 2006 13:11:16 -0400
On Fri, 26 May 2006 18:39:53 +0200, Máté Soós <msoos@xxxxxxxxxxxxxx> said:
> The problem with BCC, as far as I can see, is that the X-HASH value
> must contain the email address of the BCC recipient, which needs to be
> hidden. In theory, we could use some sort of masking of this email
> address. And if we are at hashes, why not use them (after all, they
> are one-way, not only 2nd-preimage-resistant). So, hash the address,
> and use that(or some first bytes of that) instead of the email
> string. ...
One problem with that is that it breaks things such as catch-all
addresses. e.g. (almost) all addresses @uhoreg.ca will reach me. For
example, you could write mail to hubertisamoron@... and it will be
delivered to me. But then I won't have any way of checking whether or
not there is a valid hashcash token for my address, because I don't know
what address you used to mint the stamp.
Hubert
Other related posts:
- » [hashcash] Re: BCC problem (was: Hi!)
