public inbox for bitcoindev@googlegroups.com
 help / color / mirror / Atom feed
From: Gregory Maxwell <gmaxwell@gmail.com>
To: Tom Harding <tomh@thinlink.com>
Cc: Bitcoin Development <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Address Expiration to Prevent Reuse
Date: Thu, 26 Mar 2015 20:42:55 +0000	[thread overview]
Message-ID: <CAAS2fgSSOQi4uL95S=GUdXGKZK_y4aNTUoOqkkaLFvzAVPnRig@mail.gmail.com> (raw)
In-Reply-To: <55146E2C.9020105@thinlink.com>

On Thu, Mar 26, 2015 at 8:38 PM, Tom Harding <tomh@thinlink.com> wrote:
> I addressed that by limiting the duplicate check to an X-block segment.  X
> is hard-coded in this simple scheme (X=144  => "1-day addresses").  You
> could picture a selectable expiration duration too.

If its to be heuristic in any case why not make it a client feature
instead of a consensus rule?

If someone wants to bypass anything they always can, thats what I mean
by "hide their payment under a rock"

E.g. I can take your pubkey, add G to it (adding 1 to the private
key), strip off the time limits, and send the funds.

"What do you mean I didn't pay you? I wrote a check. locked it in a
safe, and burred it in your back garden."

The answer to this can only be that payment is only tendered when its
made _exactly_ to the payee's specifications.

If someone violates the specifications all they're doing is destroying
coins. Nothing can stop people from destroying coins...

Which is why a simpler, safer, client enforced behavior is probably
preferable. Someone who wants to go hack their client to make a
payment that isn't according to the payee will have to live with the
results, esp. as we can't prevent that in a strong sense.



  reply	other threads:[~2015-03-26 20:43 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-25  1:57 [Bitcoin-development] Address Expiration to Prevent Reuse Tom Harding
2015-03-25 10:09 ` Matt Whitlock
2015-03-25 16:34 ` Gregory Maxwell
2015-03-25 18:44   ` Tom Harding
2015-03-25 19:22     ` Gregory Maxwell
2015-03-26 20:38       ` Tom Harding
2015-03-26 20:42         ` Gregory Maxwell [this message]
2015-03-26 21:26           ` Tom Harding
2015-03-26 21:33             ` Peter Todd
2015-03-26 21:44             ` Gregory Maxwell
2015-03-26 22:23               ` Tom Harding
2015-03-26 22:28               ` s7r
2015-03-26 23:00                 ` Gregory Maxwell
2015-06-13  4:52               ` odinn
2015-03-27  1:51 Thy Shizzle
2015-03-27  3:13 ` Gregory Maxwell
2015-03-27  4:31 Thy Shizzle

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAAS2fgSSOQi4uL95S=GUdXGKZK_y4aNTUoOqkkaLFvzAVPnRig@mail.gmail.com' \
    --to=gmaxwell@gmail.com \
    --cc=bitcoin-development@lists.sourceforge.net \
    --cc=tomh@thinlink.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox