Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1UPXDb-00075N-6x for bitcoin-development@lists.sourceforge.net; Tue, 09 Apr 2013 12:00:07 +0000 Received-SPF: pass (sog-mx-2.v43.ch3.sourceforge.com: domain of robbak.com designates 74.125.82.176 as permitted sender) client-ip=74.125.82.176; envelope-from=robbak@robbak.com; helo=mail-we0-f176.google.com; Received: from mail-we0-f176.google.com ([74.125.82.176]) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1UPXDZ-0006HS-6o for bitcoin-development@lists.sourceforge.net; Tue, 09 Apr 2013 12:00:07 +0000 Received: by mail-we0-f176.google.com with SMTP id s43so5389379wey.35 for ; Tue, 09 Apr 2013 04:59:59 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=mime-version:x-received:in-reply-to:references:date:message-id :subject:from:to:content-type:x-gm-message-state; bh=UJCfcGVoVQImCx1QexCLnzZnq0d+02eVN6Evk+k6BpI=; b=AhG6piged7IdPt9VmtPcF3xTQVqqYpA9ZxkAND7UHJBRQ9Szb8HemwTs82JPfnElB4 D33xgtPsRTU18SEWDUHuqHxUTVSmLkDGxkh9r4UCIgr/kw3FMDpiGWwf4HusvKeVNY5X pHMUZsTaFBZRBO/tOQ8jUbIgqC1PfG/z30EnntCpwsjJZ1A6HPbuQS2jlivYCDQPsxFo BE4jnSAHsdiI4Rz9tjuP95sg2zWfDlNjuKU7SRMFMVGChkclNEAja/4ZEqPmkzL80gs+ 1DvJ804japFX8AoNRRRgZdwVjYt7EzS4VC/PeRpxQx7moN2SICiDSs9+EVXI1WM+WQt/ 6X2A== MIME-Version: 1.0 X-Received: by 10.194.95.198 with SMTP id dm6mr37930463wjb.6.1365507273550; Tue, 09 Apr 2013 04:34:33 -0700 (PDT) Received: by 10.194.125.204 with HTTP; Tue, 9 Apr 2013 04:34:33 -0700 (PDT) In-Reply-To: References: <20130409110911.GA25700@savin> Date: Tue, 9 Apr 2013 21:34:33 +1000 Message-ID: From: Robert Backhaus To: Bitcoin Development Content-Type: multipart/alternative; boundary=047d7bb03a50faaa9404d9ebef4a X-Gm-Message-State: ALoCoQkJCKpLQL4l193oGkgJRqZ/5APyLxNSK9XHDqbpBVtuUFvuoLjXGAyMD67GXbsaLVZm2CZM X-Spam-Score: -0.5 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for sender-domain -0.0 SPF_PASS SPF: sender matches SPF record 1.0 HTML_MESSAGE BODY: HTML included in message X-Headers-End: 1UPXDZ-0006HS-6o Subject: Re: [Bitcoin-development] On-going data spam X-BeenThere: bitcoin-development@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Apr 2013 12:00:07 -0000 --047d7bb03a50faaa9404d9ebef4a Content-Type: text/plain; charset=ISO-8859-1 The obvious problem is that if you can frame it as a valid address, you can put what you want there. If you can make it pass the validation, miners have no way of knowing it's not a valid address. Of course, there is nothing new about this. I ran strings on the blockchain and found all sorts of ascii rubbish right from the beginning. On 9 April 2013 21:17, Jay F wrote: > On 4/9/2013 4:09 AM, Peter Todd wrote: > > On Tue, Apr 09, 2013 at 12:42:12PM +0200, Mike Hearn wrote: > >> hack by changing the protocol. Nodes can serve up blocks encrypted > under a > >> random key. You only get the key when you finish the download. A > blacklist > > NAK > > > > Makes bringing up a new node dependent on other nodes having consistent > > uptimes, particularly if you are on a low-bandwidth connection. > > > >> can apply to Bloom filtering such that transactions which are known to > be > >> "abusive" require you to fully download the block rather than select the > >> transactions with a filter. This means that people can still access the > > NAK > > > > No blacklists > > > It depends on how clever the spammers get encoding stuff. If law > enforcement forensic tools can pull a jpeg header + child porn out of > the blockchain, then there's a problem that needs mitigation. > > > ------------------------------------------------------------------------------ > Precog is a next-generation analytics platform capable of advanced > analytics on semi-structured data. The platform includes APIs for building > apps and a phenomenal toolset for data science. Developers can use > our toolset for easy data analysis & visualization. Get a free account! > http://www2.precog.com/precogplatform/slashdotnewsletter > _______________________________________________ > Bitcoin-development mailing list > Bitcoin-development@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-development > --047d7bb03a50faaa9404d9ebef4a Content-Type: text/html; charset=ISO-8859-1
The obvious problem is that if you can frame it as a valid address, you can put what you want there. If you can make it pass the validation, miners have no way of knowing it's not a valid address.

Of course, there is nothing new about this. I ran strings on the blockchain and found all sorts of ascii rubbish right from the beginning.


On 9 April 2013 21:17, Jay F <jayf@outlook.com> wrote:
On 4/9/2013 4:09 AM, Peter Todd wrote:
> On Tue, Apr 09, 2013 at 12:42:12PM +0200, Mike Hearn wrote:
>> hack by changing the protocol. Nodes can serve up blocks encrypted under a
>> random key. You only get the key when you finish the download. A blacklist
> NAK
>
> Makes bringing up a new node dependent on other nodes having consistent
> uptimes, particularly if you are on a low-bandwidth connection.
>
>> can apply to Bloom filtering such that transactions which are known to be
>> "abusive" require you to fully download the block rather than select the
>> transactions with a filter. This means that people can still access the
> NAK
>
> No blacklists
>
It depends on how clever the spammers get encoding stuff. If law
enforcement forensic tools can pull a jpeg header + child porn out of
the blockchain, then there's a problem that needs mitigation.

------------------------------------------------------------------------------
Precog is a next-generation analytics platform capable of advanced
analytics on semi-structured data. The platform includes APIs for building
apps and a phenomenal toolset for data science. Developers can use
our toolset for easy data analysis & visualization. Get a free account!
http://www2.precog.com/precogplatform/slashdotnewsletter
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