public inbox for bitcoindev@googlegroups.com
 help / color / mirror / Atom feed
From: Tony Churyumoff <tony991@gmail.com>
To: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: [bitcoin-dev] Fwd: Hiding entire content of on-chain transactions
Date: Wed, 10 Aug 2016 10:53:01 +0300	[thread overview]
Message-ID: <CAL3p6zrYwxFRC5JctwKsLwEzENWL0B2iUgO3crubaYkc=m5SdQ@mail.gmail.com> (raw)
In-Reply-To: <CAL3p6zqdKgkFWSDZYqVERvX2iGyS3qaLZae-kDp3Y-s1rmB2Zg@mail.gmail.com>

This troll is harmless.  A duplicate spend proof should also be signed
by the same user (Alice, in your example) to be considered a double
spend.

2016-08-09 3:18 GMT+03:00 James MacWhyte <macwhyte@gmail.com>:
> One more thought about why verification by miners may be needed.
>
> Let's say Alice sends Bob a transaction, generating output C.
>
> A troll, named Timothy, broadcasts a transaction with a random hash,
> referencing C's output as its spend proof. The miners can't tell if it's
> valid or not, and so they include the transaction in a block. Now Bob's
> money is useless, because everyone can see the spend proof referenced and
> thinks it has already been spent, even though the transaction that claims it
> isn't valid.
>
> Did I miss something that protects against this?
>


  parent reply	other threads:[~2016-08-10  7:53 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-08 15:30 [bitcoin-dev] Hiding entire content of on-chain transactions Tony Churyumoff
2016-08-08 15:47 ` Henning Kopp
2016-08-08 16:03   ` Tony Churyumoff
2016-08-08 21:41     ` James MacWhyte
2016-08-08 21:53       ` Peter Todd
     [not found]         ` <CAL3p6zpvv7ph9CJQF6E1VVdwCKKFLNe2EVh=JE=R0Gpt4y=1Tw@mail.gmail.com>
2016-08-10  7:50           ` [bitcoin-dev] Fwd: " Tony Churyumoff
2016-08-08 23:42       ` [bitcoin-dev] " Tony Churyumoff
2016-08-09  0:03         ` James MacWhyte
     [not found]           ` <CAL3p6zr76k1F07dtvxQ8hiOiK_ZvVFBmW=ESYem60udUQmM+Cw@mail.gmail.com>
2016-08-10  7:51             ` [bitcoin-dev] Fwd: " Tony Churyumoff
2016-08-09  0:18         ` [bitcoin-dev] " James MacWhyte
     [not found]           ` <CAL3p6zqdKgkFWSDZYqVERvX2iGyS3qaLZae-kDp3Y-s1rmB2Zg@mail.gmail.com>
2016-08-10  4:31             ` James MacWhyte
2016-08-10  8:37               ` Tony Churyumoff
2016-08-10  7:53             ` Tony Churyumoff [this message]
2016-08-09  7:26     ` Henning Kopp
     [not found]       ` <CAL3p6zqj7bc=qrayBBK=O6p2b2PBNO3n5EMFf_1dR1oMq581hg@mail.gmail.com>
2016-08-10  7:52         ` [bitcoin-dev] Fwd: " Tony Churyumoff

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='CAL3p6zrYwxFRC5JctwKsLwEzENWL0B2iUgO3crubaYkc=m5SdQ@mail.gmail.com' \
    --to=tony991@gmail.com \
    --cc=bitcoin-dev@lists.linuxfoundation.org \
    /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