From: Wladimir <laanwj@gmail•com>
To: Mark van Cuijk <mark@coinqy•com>
Cc: Bitcoin Dev <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] BIP72 amendment proposal
Date: Sat, 13 Sep 2014 10:53:34 +0200 [thread overview]
Message-ID: <CA+s+GJBWTji2JfTF+8+zb+9LWV2mK7inqVakdMhoXQYi4_a-Jw@mail.gmail.com> (raw)
In-Reply-To: <06D9FBBD-30DB-4591-A932-B5A19F1D6543@coinqy.com>
On Fri, Sep 12, 2014 at 10:59 PM, Mark van Cuijk <mark@coinqy•com> wrote:
> If you do so, please make sure the length of the hash is included in the PaymentDetails/PaymentRequest. If someone parses the URI and doesn’t have an authenticated way of knowing the expected length of the hash, a MITM attacker can just truncate the hash to lower security.
But if they can truncate they can just as well pass a completely
different hash that matches their payment request. If an attacker can
change the bitcoin: URI, this scheme is broken.
The point of the proposal is to make sure that the payment request
matches the URI. So *if* you communicate the URI by secure means, this
authenticates the associated payment request as well, even if fetched
by insecure means (such as http:...) itself.
Wladimir
next prev parent reply other threads:[~2014-09-13 8:53 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.342174.1410547421.2163.bitcoin-development@lists.sourceforge.net>
2014-09-12 20:59 ` Mark van Cuijk
2014-09-13 8:53 ` Wladimir [this message]
[not found] <mailman.341412.1410515709.2178.bitcoin-development@lists.sourceforge.net>
2014-09-12 10:11 ` Mark van Cuijk
2014-09-12 11:07 ` Andreas Schildbach
2014-09-12 13:49 ` Mike Hearn
2014-09-12 14:15 ` Jeff Garzik
2014-09-12 14:36 ` Andreas Schildbach
2014-09-12 15:25 ` Christophe Biocca
2014-09-12 15:33 ` Christophe Biocca
2014-09-12 15:37 ` Mike Hearn
2014-09-12 16:31 ` Mike Hearn
2014-09-12 18:43 ` Aaron Voisine
2014-09-15 7:43 ` Andreas Schildbach
2014-09-15 7:12 ` Andreas Schildbach
2014-09-12 15:36 ` Mike Hearn
2014-09-12 9:29 Andreas Schildbach
2014-09-12 9:55 ` Wladimir
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