On 09/25/2013 01:15 PM, Mike Hearn wrote: > It won't fit.
Why do you think that? Of course, I would skip the certificate, as its unnecessary if you see your partner in person. > But I don't see the logic. A URI contains instructions for > making a payment. If that instruction is "pay to this address" or > "download this file and do what you find there", it's no different > unless there's potential for a MITM attack. If the request URL is HTTPS > or a secured Bluetooth connection then there's no such possibility. HTTPS trust is utterly broken unless you fix it by adding the certificate or a fingerprint to the QR code. Bluetooth is not present in every case, e.g. QR codes scanned from the web. (Also, we currently don't have a concept of allowing both. The receiver forces you to either use BT or HTTP.) So yes, MITM is what I'm worrying about. When I'm scanning a QR code from a phone, you don't have that problem (unless sophisticated optical attacks emerge). Also, the HTTP request can fail and/or be slow, making the whole payment process more difficult than necessary. > On Wed, Sep 25, 2013 at 12:28 PM, Andreas Schildbach > <andr...@schildbach.de <mailto:andr...@schildbach.de>> wrote: > > While it's good to save space, I'm at the moment not convinced that > taking a de-route via an URL is a good idea to begin with. > > The main problem is trust. If you scan a QR code from a foreign phone, > you trust that that phone is owned by the one you want to send money to. > By adding the HTTP request that trust is voided. > > As soon as there is a BIP70 implementation, I will begin playing with > putting the payment request directly into the QR code. > > > On 09/25/2013 11:27 AM, Mike Hearn wrote: > > We could also say that if protocol part (https://) is missing, it's > > implied automatically. So just: > > > > bitcoin:1abc........?r=bob.com/r/aZgR <http://bob.com/r/aZgR> > <http://bob.com/r/aZgR> > > > > I think that's about as small as possible without re-using the > pubkey as > > a token in the url. > > > > > > On Wed, Sep 25, 2013 at 1:35 AM, Gavin Andresen > <gavinandre...@gmail.com <mailto:gavinandre...@gmail.com> > > <mailto:gavinandre...@gmail.com <mailto:gavinandre...@gmail.com>>> > wrote: > > > > On Tue, Sep 24, 2013 at 11:52 PM, Mike Hearn <m...@plan99.net > <mailto:m...@plan99.net> > > <mailto:m...@plan99.net <mailto:m...@plan99.net>>> wrote: > > > > BTW, on the "make qrcodes more scannable" front -- is it too > > late to change BIP 72 so the new param is just "r" instead of > > "request"? Every byte helps when it comes to qrcodes ... > > > > > > Not too late, assuming there are no objections. Smaller QR > codes is > > a very good reason to change it. > > > > -- > > -- > > Gavin Andresen > > > > > > > > > > > > ------------------------------------------------------------------------------ > > October Webinars: Code for Performance > > Free Intel webinars can help you accelerate application performance. > > Explore tips for MPI, OpenMP, advanced profiling, and more. Get > the most from > > the latest Intel processors and coprocessors. See abstracts and > register > > > > > http://pubads.g.doubleclick.net/gampad/clk?id=60133471&iu=/4140/ostg.clktrk > > > > > > > > _______________________________________________ > > Bitcoin-development mailing list > > Bitcoin-development@lists.sourceforge.net > <mailto:Bitcoin-development@lists.sourceforge.net> > > https://lists.sourceforge.net/lists/listinfo/bitcoin-development > > > > > > > ------------------------------------------------------------------------------ > October Webinars: Code for Performance > Free Intel webinars can help you accelerate application performance. > Explore tips for MPI, OpenMP, advanced profiling, and more. Get the > most from > the latest Intel processors and coprocessors. See abstracts and > register > > > http://pubads.g.doubleclick.net/gampad/clk?id=60133471&iu=/4140/ostg.clktrk > _______________________________________________ > Bitcoin-development mailing list > Bitcoin-development@lists.sourceforge.net > <mailto:Bitcoin-development@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/bitcoin-development > > > > > ------------------------------------------------------------------------------ > October Webinars: Code for Performance > Free Intel webinars can help you accelerate application performance. > Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from > the latest Intel processors and coprocessors. See abstracts and register > > http://pubads.g.doubleclick.net/gampad/clk?id=60133471&iu=/4140/ostg.clktrk > > > > _______________________________________________ > Bitcoin-development mailing list > Bitcoin-development@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-development > ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60133471&iu=/4140/ostg.clktrk _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
