From: Mike Hearn <mike@plan99•net>
To: Andreas Schildbach <andreas@schildbach•de>
Cc: Bitcoin Dev <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] Instant / contactless payments
Date: Fri, 7 Mar 2014 12:01:15 +0100 [thread overview]
Message-ID: <CANEZrP3sQWqjpt2vMS8paQvWM=Fn=jPkEOk9g_ZukM3Ouhkw=A@mail.gmail.com> (raw)
In-Reply-To: <lfc6mi$qth$1@ger.gmane.org>
[-- Attachment #1: Type: text/plain, Size: 903 bytes --]
>
> Interesting side note: They recommend messages transmitted via NFC to
> not exceed 1 KB in order for a snappy experience. This (again) questions
> usage of bulky X.509 certificates in our payment request messages.
> Bitcoin Wallet currently does not sign payment requests, so I could not
> try how it would feel.
I think you could just put a signed PaymentRequest into an NFC tag and try
reading it from that. It's the same underlying radio tech so the transfer
speeds should be similar, I'd think.
Common X.509 certs are bigger than they need to be for sure, but a lot of
the bulk comes from the use of RSA rather than ECC. An RSA signature alone
can be 256 bytes! There's nothing that states you have to use RSA for
certificates and ECC certs are out there (Google uses one), but I think
they are harder to get hold of. I guess over time SSL will migrate to
mostly ECC (secp256r1) based certs.
[-- Attachment #2: Type: text/html, Size: 1264 bytes --]
next prev parent reply other threads:[~2014-03-07 11:01 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-06 9:45 Mike Hearn
2014-03-06 11:26 ` Andreas Schildbach
2014-03-06 13:44 ` Mike Hearn
2014-03-06 14:51 ` Andreas Schildbach
2014-03-06 16:55 ` [Bitcoin-development] Instant / contactless payments, IsoDep Andreas Schildbach
2014-03-06 17:00 ` Mike Hearn
2014-03-07 8:45 ` Andreas Schildbach
2014-03-07 9:26 ` [Bitcoin-development] Instant / contactless payments Johannes Zweng
2014-03-07 10:00 ` Mike Hearn
2014-03-07 10:23 ` Andreas Schildbach
2014-03-07 11:01 ` Mike Hearn [this message]
2014-03-07 12:00 ` Johannes Zweng
2014-03-06 14:20 ` Brooks Boyd
2014-03-06 17:07 ` Mike Hearn
2014-03-06 18:08 ` Brooks Boyd
2014-03-06 18:12 ` Mike Hearn
2014-03-06 18:20 ` Brooks Boyd
2014-03-06 18:24 ` Mike Hearn
2014-03-07 18:07 ` Joel Kaartinen
2014-03-06 14:39 ` Alex Kotenko
2014-03-06 16:46 ` Andreas Schildbach
2014-03-06 16:52 ` Mike Hearn
2014-03-06 18:03 ` Alex Kotenko
2014-03-07 8:59 ` Andreas Schildbach
2014-03-06 17:03 ` Mike Hearn
2014-03-06 18:49 ` Alex Kotenko
2014-03-08 8:52 ` Jan Vornberger
2014-03-10 15:09 ` Alex Kotenko
2014-03-10 19:28 ` Andreas Schildbach
2014-03-10 19:47 ` Alex Kotenko
2014-03-07 19:08 ` Troy Benjegerdes
2014-03-10 16:04 ` Mike Hearn
2014-03-10 16:14 ` Jean-Paul Kogelman
2014-03-10 16:27 ` Alex Kotenko
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='CANEZrP3sQWqjpt2vMS8paQvWM=Fn=jPkEOk9g_ZukM3Ouhkw=A@mail.gmail.com' \
--to=mike@plan99$(echo .)net \
--cc=andreas@schildbach$(echo .)de \
--cc=bitcoin-development@lists$(echo .)sourceforge.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
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