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Auteur: Amir Taaki
Datum:  
Aan: unsystem
Onderwerp: Re: [unSYSTEM] Stealth Bitcoin Addresses
Robert, maybe you're interested to participate in this conversation:

https://groups.google.com/d/msg/twister-users/cgxyB2oOQkk/Ov-MUUv3uG4J

Also about the secret, it allows you to put a static address somewhere
and receive anonymous payments. It doesn't preclude treating the address
itself like a secret though and sending that over a special channel like
Twister uniquely to different participants. You don't have to send
everyone the same address.

Together with those 3 schemes 1) Twister transmission 2) Stealth
addresses 3) CoinJoin, we have very strong financial privacy.

Are you on IRC ever? I'm in Freenode #darkwallet. I've got some
questions if you're around in next few days for some minutes.

On 15/01/14 13:19, Robert Williamson wrote:
> Ah this has all just clicked with me, using Diffie-Hellman to create a
> shared secret then using that to encrypt the nonce.
>
> This could also be used for generating a temporary/disposable aes key
> for encrypting messages between people.
>
> satoshi mentioned that storing data in the blockchain or anywhere
> publicly might be a bad idea as if you had your private key compromised
> then all the data would be revealed.
>
> https://bitcointalk.org/index.php?topic=25.msg159#msg159 (post 10)
>
> Doing private messages/etc over twister or another distributed platform
> this is probably a good way to do it securely without having your key
> attached to every message that is sent.
>
> Thanks
> Bob
>
>
>
>
>
> On 15 January 2014 12:33, Amir Taaki <genjix@???
> <mailto:genjix@riseup.net>> wrote:
>
>     some code: https://gist.github.com/jspilman/8396495

>
>     On 15/01/14 03:57, Thomas Hartman wrote:
>     > Awesome if true.
>     >
>     > On Jan 14, 2014 5:38 PM, "Amir Taaki" <genjix@???
>     <mailto:genjix@riseup.net>
>     > <mailto:genjix@riseup.net <mailto:genjix@riseup.net>>> wrote:

>     >
>     >     I'm not sure that's true (asked Peter about it):

>     >
>     >     <petertodd> stealth addresses are "I give you a chain code, you
>     >     derive new
>     >     pubkeys with random 32-byte nonces, and then encrypt that nonce in
>     >     the tx
>     >     itself so I can decrypt it and recover the funds"

>     >
>     >     if so then combined with CoinJoin this is holy-grail, and we don't
>     >     need to
>     >     worry about Twister/XMPP/BitMessage for transmitting secrets
>     around.

>     >
>     >     > So sad that you're fed up with me.

>     >     >
>     >     > This seems great for fairly anonymous payments.

>     >     >
>     >     > My only problem is if the deterministic offset n is encoded
>     in the
>     >     paying
>     >     > transaction then anyone else you also gave that mpk to, will
>     also
>     >     see the
>     >     > address.

>     >     >
>     >     > So I still really prefer some solution where payment
>     addresses are
>     >     > contracted and signed by a key, for either a one off payment
>     or a
>     >     sequence
>     >     > of payments over a period.

>     >     >
>     >     > Thanks
>     >     > Bob
>     >     > On 14 Jan 2014 00:31, "Nicolás Mendoza"
>     <nicolasmendo@??? <mailto:nicolasmendo@gmail.com>
>     >     <mailto:nicolasmendo@gmail.com
>     <mailto:nicolasmendo@gmail.com>>> wrote:

>     >     >
>     >     >> Thanks for using Drak in your example, I'm fed up with Bob
>     and Alice

>     >     >>

>     >     >>
>     >     >> On Tue, Jan 14, 2014 at 5:29 AM, Amir Taaki
>     <genjix@??? <mailto:genjix@riseup.net>
>     >     <mailto:genjix@riseup.net <mailto:genjix@riseup.net>>> wrote:

>     >     >>
>     >     >>> great, thanks for showing me this. I know the basic idea.
>     The only
>     >     >>> thing
>     >     >>> I'd add is that once you know the nonce, that the payor
>     doesn't
>     >     need to
>     >     >>> recreate these txs repeatedly. So when I pay Drak, I only
>     need to do
>     >     >>> this the first ever time I pay Drak.

>     >     >>>
>     >     >>> On 13/01/14 19:49, Drak wrote:
>     >     >>> > Have you guys seen this discussion on the bitcoin
>     mailing list
>     >     (and
>     >     >>> now
>     >     >>> > there is a working
>     >     >>> > implementation):
>     >     >>> http://sourceforge.net/mailarchive/message.php?msg_id=31813471

>     >     >>> >
>     >     >>> > Seems to be a major step forward in terms of privacy.
>     Probably
>     >     needs
>     >     >>> a
>     >     >>> > few more technical eyes on it but it looks really promising.

>     >     >>> >
>     >     >>> > Drak

>     >     >>> >

>     >     >>> >
>     >     >>> > _______________________________________________
>     >     >>> > unSYSTEM mailing list: http://unsystem.net

>     >     >>> >
>     https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/unsystem

>     >     >>> >

>     >     >>>

>     >     >>>
>     >     >>> _______________________________________________
>     >     >>> unSYSTEM mailing list: http://unsystem.net

>     >     >>>
>     https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/unsystem

>     >     >>>

>     >     >>>

>     >     >>

>     >     >>
>     >     >> --
>     >     >> Nicolas Mendoza

>     >     >>
>     >     >> PhD Researcher
>     >     >> School of Creative Media
>     >     >> City University of Hong Kong
>     >     >> China PDR - HKSAR

>     >     >>

>     >     >>
>     >     >> _______________________________________________
>     >     >> unSYSTEM mailing list: http://unsystem.net
>     >     >> https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/unsystem

>     >     >>

>     >     >>
>     >     > _______________________________________________
>     >     > unSYSTEM mailing list: http://unsystem.net
>     >     > https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/unsystem

>     >     >

>     >

>     >
>     >     _______________________________________________
>     >     unSYSTEM mailing list: http://unsystem.net
>     >     https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/unsystem

>     >

>     >

>     >
>     > _______________________________________________
>     > unSYSTEM mailing list: http://unsystem.net
>     > https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/unsystem

>     >

>
>
>     _______________________________________________
>     unSYSTEM mailing list: http://unsystem.net
>     https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/unsystem

>
>
>
>
> _______________________________________________
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>