public inbox for bitcoindev@googlegroups.com
 help / color / mirror / Atom feed
From: "Jorge Timón" <timon.elviejo@gmail.com>
To: Andy Parkins <andyparkins@gmail.com>
Cc: bitcoin-development@lists.sourceforge.net
Subject: Re: [Bitcoin-development] Addressing rapid changes in mining power
Date: Wed, 23 Nov 2011 12:51:00 +0100	[thread overview]
Message-ID: <CAGQP0AEZ9CUNd9ERyMsx741bqjLptY4pPRU6EmxQcD7kR8bdbw@mail.gmail.com> (raw)
In-Reply-To: <201111231130.58785.andyparkins@gmail.com>

With the current system, the timestamp can also be cheated, but miners
have no direct incentive to do it. With your system, they increase
their probability of mining a block by putting a false timestamp.
Also, where's the network clock you're talking about? Isn't it the
timestamps in the blockchain?



2011/11/23, Andy Parkins <andyparkins@gmail.com>:
> On 2011 November 23 Wednesday, Jorge Timón wrote:
>> 2011/11/23, Andy Parkins <andyparkins@gmail.com>:
>> > Let's abandon the idea of a target difficulty.  Instead, every node just
>> >
>>  > generates the most difficulty block it can.  Simultaneously, every node
>>  > is listening for "the most difficult block generated before time T";
>>  > with T being
>>  > picked to be the block generation rate (10 minutes).
>>
>> A miner could try to obtain more difficulty out of time and cheat its
>> reported datetime (T).
>
> Just as with the current system.
>
> The defence is that on receipt of a block, its timestamp is checked against
> the node's own clock and averaged network clock.  Blocks out of that band
> are
> rejected.
>
>
> Andy
> --
> Dr Andy Parkins
> andyparkins@gmail.com
>


-- 
Jorge Timón



  reply	other threads:[~2011-11-23 11:51 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-11-23 10:35 [Bitcoin-development] Addressing rapid changes in mining power Andy Parkins
2011-11-23 11:25 ` Jorge Timón
2011-11-23 11:30   ` Andy Parkins
2011-11-23 11:51     ` Jorge Timón [this message]
2011-11-23 12:10       ` Christian Decker
2011-11-23 13:13         ` Andy Parkins
2011-11-23 14:38           ` Christian Decker
2011-11-23 15:09             ` Gavin Andresen
2011-11-23 15:35               ` Alan Reiner
2011-11-23 15:39               ` Andy Parkins
2011-11-23 16:26                 ` Joel Joonatan Kaartinen
2011-11-23 15:11             ` Andy Parkins
2011-11-23 12:54       ` Andy Parkins
2011-11-23 15:10         ` Jorge Timón
2011-11-23 15:29           ` Andy Parkins
2011-11-23 15:38             ` Jorge Timón

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=CAGQP0AEZ9CUNd9ERyMsx741bqjLptY4pPRU6EmxQcD7kR8bdbw@mail.gmail.com \
    --to=timon.elviejo@gmail.com \
    --cc=andyparkins@gmail.com \
    --cc=bitcoin-development@lists.sourceforge.net \
    /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