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Date: Tue, 4 Feb 2014 16:17:47 +0100
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From: Natanael <natanael.l@gmail.com>
To: Peter Todd <pete@petertodd.org>
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Cc: bitcoin-development@lists.sourceforge.net
Subject: Re: [Bitcoin-development] bitcoinj 0.11 released, with p2sh,
bip39 and payment protocol support
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--089e0102f2128e324704f1962460
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Because it's trivial to create collisions! You can choose exactly what
output you want. That's why XOR is a very bad digest scheme.
- Sent from my phone
Den 4 feb 2014 14:20 skrev "Peter Todd" <pete@petertodd.org>:
> On Tue, Feb 04, 2014 at 02:13:12PM +0100, Mike Hearn wrote:
> > Hah, good point. If nobody completes the homework, I'll post a fixed
> > version tomorrow :)
>
> Heh, here's another 25mBTC while we're at it:
>
>
> https://github.com/opentimestamps/opentimestamps-client/commit/288f3c17626974de7eaef4f1c9b5cd93eecf40f6
>
> Why is that a bad idea?
>
> Bonus question: What was I smoking? (hint: where do I live?)
>
> > On Tue, Feb 4, 2014 at 2:03 PM, Peter Todd <pete@petertodd.org> wrote:
> >
> > > On Tue, Feb 04, 2014 at 01:01:12PM +0100, Mike Hearn wrote:
> > > > Hello,
> > > >
> > > > I'm pleased to announce the release of bitcoinj 0.11, a library for
> > > writing Bitcoin applications that run on the JVM. BitcoinJ is widely
> used
> > > across the Bitcoin community; some users include Bitcoin Wallet for
> > > Android, MultiBit, Hive, blockchain.info, the biteasy.com block
> explorer
> > > (written in Lisp!), Circle, Neo/Bee (Cypriot payment network),
> bitpos.me,
> > > Bitcoin Touch, BlueMatt's relay network and DNS crawler, academic
> advanced
> > > contracts research and more.
> > > >
> > > > The release-0.11 git tag is signed by Andreas Schildbach's GPG key.
> The
> > > commit hash is 410d4547a7dd. This paragraph is signed by the same
> Bitcoin
> > > key as with previous releases (check their release announcements to
> > > establish continuity). Additionally, this email is signed using DKIM
> and
> > > for the first time, a key that was ID verified by the Swiss government.
> > > >
> > > > Key: 16vSNFP5Acsa6RBbjEA7QYCCRDRGXRFH4m
> > > > Signature for last paragraph:
> > >
> H3DvWBqFHPxKW/cdYUdZ6OHjbq6ZtC5PHK4ebpeiE+FqTHyRLJ58BItbC0R2vo77h+DthpQigdEZ0V8ivSM7VIg=
> > >
> > > The above makes for a great homework problem for budding
> cryptographers:
> > > Why did the three forms of signature, DKIM, long-lived bitcoin address,
> > > and Official Swiss Government Identity fail to let you actually verify
> > > you have the right code? (but make for great security theater)
> > >
> > > Bonus question: Who has the smallest work-factor for such an attack?
> > >
> > > Two rewards of 25mBTC for correct responses to each question from a
> > > crypto newbie.
> > >
> > > > Thanks to Mike Belshe, the wallet can now send to P2SH addresses.
> > >
> > > Thanks
> > >
> > > > Generated signatures now use canonical S values. This will aid a
> future
> > > hard-forking rule change which bans malleable signatures.
> > >
> > > Soft-forking rule change.
> > >
> > > --
> > > 'peter'[:-1]@petertodd.org
> > > 000000000000000075829f6169c79d7d5aaa20bfa8da6e9edb2393c4f8662ba0
> > >
>
> --
> 'peter'[:-1]@petertodd.org
> 000000000000000075829f6169c79d7d5aaa20bfa8da6e9edb2393c4f8662ba0
>
>
> ------------------------------------------------------------------------------
> Managing the Performance of Cloud-Based Applications
> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
> Read the Whitepaper.
>
> http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
> _______________________________________________
> Bitcoin-development mailing list
> Bitcoin-development@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bitcoin-development
>
>
--089e0102f2128e324704f1962460
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
<p dir=3D"ltr">Because it's trivial to create collisions! You can choos=
e exactly what output you want. That's why XOR is a very bad digest sch=
eme.</p>
<p dir=3D"ltr">- Sent from my phone</p>
<div class=3D"gmail_quote">Den 4 feb 2014 14:20 skrev "Peter Todd"=
; <<a href=3D"mailto:pete@petertodd.org">pete@petertodd.org</a>>:<br =
type=3D"attribution"><blockquote class=3D"gmail_quote" style=3D"margin:0 0 =
0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Tue, Feb 04, 2014 at 02:13:12PM +0100, Mike Hearn wrote:<br>
> Hah, good point. If nobody completes the homework, I'll post a fix=
ed<br>
> version tomorrow :)<br>
<br>
Heh, here's another 25mBTC while we're at it:<br>
<br>
<a href=3D"https://github.com/opentimestamps/opentimestamps-client/commit/2=
88f3c17626974de7eaef4f1c9b5cd93eecf40f6" target=3D"_blank">https://github.c=
om/opentimestamps/opentimestamps-client/commit/288f3c17626974de7eaef4f1c9b5=
cd93eecf40f6</a><br>
<br>
Why is that a bad idea?<br>
<br>
Bonus question: What was I smoking? (hint: where do I live?)<br>
<br>
> On Tue, Feb 4, 2014 at 2:03 PM, Peter Todd <<a href=3D"mailto:pete@=
petertodd.org">pete@petertodd.org</a>> wrote:<br>
><br>
> > On Tue, Feb 04, 2014 at 01:01:12PM +0100, Mike Hearn wrote:<br>
> > > Hello,<br>
> > ><br>
> > > I'm pleased to announce the release of bitcoinj 0.11, a =
library for<br>
> > writing Bitcoin applications that run on the JVM. BitcoinJ is wid=
ely used<br>
> > across the Bitcoin community; some users include Bitcoin Wallet f=
or<br>
> > Android, MultiBit, Hive, <a href=3D"http://blockchain.info" targe=
t=3D"_blank">blockchain.info</a>, the <a href=3D"http://biteasy.com" target=
=3D"_blank">biteasy.com</a> block explorer<br>
> > (written in Lisp!), Circle, Neo/Bee (Cypriot payment network), <a=
href=3D"http://bitpos.me" target=3D"_blank">bitpos.me</a>,<br>
> > Bitcoin Touch, BlueMatt's relay network and DNS crawler, acad=
emic advanced<br>
> > contracts research and more.<br>
> > ><br>
> > > The release-0.11 git tag is signed by Andreas Schildbach'=
;s GPG key. The<br>
> > commit hash is 410d4547a7dd. This paragraph is signed by the same=
Bitcoin<br>
> > key as with previous releases (check their release announcements =
to<br>
> > establish continuity). Additionally, this email is signed using D=
KIM and<br>
> > for the first time, a key that was ID verified by the Swiss gover=
nment.<br>
> > ><br>
> > > Key: 16vSNFP5Acsa6RBbjEA7QYCCRDRGXRFH4m<br>
> > > Signature for last paragraph:<br>
> > H3DvWBqFHPxKW/cdYUdZ6OHjbq6ZtC5PHK4ebpeiE+FqTHyRLJ58BItbC0R2vo77h=
+DthpQigdEZ0V8ivSM7VIg=3D<br>
> ><br>
> > The above makes for a great homework problem for budding cryptogr=
aphers:<br>
> > Why did the three forms of signature, DKIM, long-lived bitcoin ad=
dress,<br>
> > and Official Swiss Government Identity fail to let you actually v=
erify<br>
> > you have the right code? (but make for great security theater)<br=
>
> ><br>
> > Bonus question: Who has the smallest work-factor for such an atta=
ck?<br>
> ><br>
> > Two rewards of 25mBTC for correct responses to each question from=
a<br>
> > crypto newbie.<br>
> ><br>
> > > Thanks to Mike Belshe, the wallet can now send to P2SH addre=
sses.<br>
> ><br>
> > Thanks<br>
> ><br>
> > > Generated signatures now use canonical S values. This will a=
id a future<br>
> > hard-forking rule change which bans malleable signatures.<br>
> ><br>
> > Soft-forking rule change.<br>
> ><br>
> > --<br>
> > 'peter'[:-1]@<a href=3D"http://petertodd.org" target=3D"_=
blank">petertodd.org</a><br>
> > 000000000000000075829f6169c79d7d5aaa20bfa8da6e9edb2393c4f8662ba0<=
br>
> ><br>
<br>
--<br>
'peter'[:-1]@<a href=3D"http://petertodd.org" target=3D"_blank">pet=
ertodd.org</a><br>
000000000000000075829f6169c79d7d5aaa20bfa8da6e9edb2393c4f8662ba0<br>
<br>-----------------------------------------------------------------------=
-------<br>
Managing the Performance of Cloud-Based Applications<br>
Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.<br>
Read the Whitepaper.<br>
<a href=3D"http://pubads.g.doubleclick.net/gampad/clk?id=3D121051231&iu=
=3D/4140/ostg.clktrk" target=3D"_blank">http://pubads.g.doubleclick.net/gam=
pad/clk?id=3D121051231&iu=3D/4140/ostg.clktrk</a><br>__________________=
_____________________________<br>
Bitcoin-development mailing list<br>
<a href=3D"mailto:Bitcoin-development@lists.sourceforge.net">Bitcoin-develo=
pment@lists.sourceforge.net</a><br>
<a href=3D"https://lists.sourceforge.net/lists/listinfo/bitcoin-development=
" target=3D"_blank">https://lists.sourceforge.net/lists/listinfo/bitcoin-de=
velopment</a><br>
<br></blockquote></div>
--089e0102f2128e324704f1962460--
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