From: Natanael <natanael.l@gmail.com>
To: Johnson Lau <jl2012@xbt.hk>
Cc: Bitcoin Dev <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] Anti-transaction replay in a hardfork
Date: Wed, 25 Jan 2017 08:15:14 +0100 [thread overview]
Message-ID: <CAAt2M1_cQTfaDyQkaixeFB5Ubi35fSOs9Ks74WZEehtFk__B3w@mail.gmail.com> (raw)
In-Reply-To: <311FE02A-F3B5-4F88-B6C8-F0E78CC46903@xbt.hk>
[-- Attachment #1: Type: text/plain, Size: 833 bytes --]
Den 25 jan. 2017 08:06 skrev "Johnson Lau" <jl2012@xbt.hk>:
What you describe is not a fix of replay attack. By confirming the same tx
in both network, the tx has been already replayed. Their child txs do not
matter.
Read it again.
The validation algorithm would be extended so that the transaction can't be
replayed, because replaying it in the other network REQUIRES a child
transaction in the same block that is valid, a child transaction the is
unique to the network. By doing this policy change simultaneously in both
networks, old pre-signed transactions *can not be replayed by anybody but
the owner* of the coins (as he must spend them immediately in the child
transaction).
It means that as soon as spent, the UTXO sets immediately and irrevocably
diverges across the two networks. Which is the entire point, isn't it?
[-- Attachment #2: Type: text/html, Size: 1358 bytes --]
next prev parent reply other threads:[~2017-01-25 7:15 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-24 14:33 [bitcoin-dev] Anti-transaction replay in a hardfork Johnson Lau
2017-01-24 18:52 ` Tom Harding
2017-01-25 4:03 ` Johnson Lau
2017-01-25 19:32 ` Tom Harding
2017-01-27 20:47 ` Johnson Lau
2017-01-27 22:11 ` Tom Harding
2017-01-25 1:22 ` Natanael
2017-01-25 7:05 ` Johnson Lau
2017-01-25 7:15 ` Natanael [this message]
2017-01-25 7:21 ` Johnson Lau
2017-01-25 7:29 ` Natanael
2017-01-25 7:42 ` Johnson Lau
2017-01-26 3:29 ` Matt Corallo
2017-01-26 7:03 ` Chris Priest
2017-01-26 7:14 ` Johnson Lau
2017-01-26 8:59 ` Chris Priest
2017-01-26 9:20 ` Johnson Lau
2017-01-26 10:55 ` Edmund Edgar
2017-01-26 15:58 ` Tom Harding
2017-01-26 17:21 ` Gavin Andresen
2017-01-26 17:41 ` Matt Corallo
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=CAAt2M1_cQTfaDyQkaixeFB5Ubi35fSOs9Ks74WZEehtFk__B3w@mail.gmail.com \
--to=natanael.l@gmail.com \
--cc=bitcoin-dev@lists.linuxfoundation.org \
--cc=jl2012@xbt.hk \
/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