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1  Bitcoin / Development & Technical Discussion / Possible problem with Intersango / Britcoin (resolved,minor error) on: July 15, 2011, 07:22:46 PM
I have observed some potential issue with Intersango.

I cannot exclude that it is some error on my side
(I didn't sleep enough last night 'cause I was fiddling
with the German version of "Securing your wallet",
coincidentally). Or simply some accidental slip
as the service is still young.

However, just for the case that the issue is
real and more than accident, perhaps you should halt
trading for a moment, and wait until Genjix confirms that
everything is OK and safe. I already sent him the details.

Thanks.

- Joise

(cross-posted from "Trading discussion", please excuse.)
2  Economy / Trading Discussion / Possible problem with Intersango / Britcoin on: July 15, 2011, 07:16:41 PM
I have observed some issue with intersango.

I cannot exclude that it is some error on my side
(I didn't sleep enough last night 'cause I was fiddling
with the German version of "Securing your wallet",
coincidentally). Or simply an accidental slip
as the service is still young.


However, just for the case that the issue is
real and more than accident, you should halt trading,
and wait until Genjix confirms that everything is
OK and safe.

Thanks.

- Joise

3  Economy / Economics / Gold, oil, fiat money and the islamic law on: July 13, 2011, 12:06:58 AM
There's an interesting article which dwells on the interactions between
gold price and the price of oil, as well as on the consequences
that the oil resources are finite and production is likely to peak in these
days - if they didn't peak already.

As it turns out, oil price and gold price are linked in several
ways: For example a high oil price could trigger inflation,
which will lead to a preference for gold. A very high oil
price would also weaken the US economy, which could lead
to a process that oil-producing countries could prefer
some other payment than the dollar.

Then, there is a very interesting remark that astonished
me. To cite:

"The answer to that question begins with the historical desire of Arab producers to receive gold in exchange for their oil. This dates back to 1933 when King Ibn Saud demanded payment in gold for the original oil concession in Saudi Arabia. In addition, Islamic law forbids the use of a promise of payment, such as the US dollar, as a medium of exchange. There is growing dissention among religious fundamentalists in Saudi Arabia regarding the exchange of oil for US dollars."

The full text is here:

http://www.gold-eagle.com/editorials_05/barisheff042205.html



[To be true, I believe but I am not completely sure that this
is the original source - there are numerous references and
unattributed copies of this text on the web.]


What is stunning for me is that fiat money in general and the dollar
in particular is seen as a payment _promise_. I bet that Bitcoin is
probably more seen as an asset that may have value or not; but
it does not depend on the goodwill or ability or trustworthiness
of the person paying with it, only on a diligent check on the
side of the receiver.

Its quite fascinating - and I don't say that ironically at all -
that bitcoin seems to be able to gain support from wildly
different partys. I am not a religious person but I think that
at least in THIS aspect islamic law might have very good
reasons which people from completely different political ends
might share.

I am writing this at the late evening of a day where a
collapse of the european currency became thinkable.
If this becomes reality, then it could be attributed to
a large part to the way how power is able to shift
perception of realities into outright denial, how a suffucient
amount of money turns a dedicated medium of exchange
into a literal Ponzi scheme.

I remind also that seemingly _each_ of the last important wars
has led governments to tinker with the value of
money. In Germany, it was the abolishment of
the Goldmark for war bounds during, and the payment of
reparations with money printing presses after
world war I. World war II was financed by a technique
which was called "silent war financing" (geräuschlose
Kriegsfinanzierung) - basically, banks were forced
to sign war bounds because people had no interest in them.
In the US, the end of the dollar's gold backing was not
by mere coincidence during the vietnam war. I think
about the economical consequences of the Iraq/Afghanistan
wars everyone has his own picture.

It's certainly a truly naive and innocent wish but
it would be too beautiful if bitcoin could contribute
to a world with fewer wars....

But what do you think about this? Many people
have pointed out that bitcoin seems to have
compatibility with the Hawala System (http://en.wikipedia.org/wiki/Hawala).
Might it be compatible to some important aspects of arabic culture?
My personal feeling is yes.


- Joise

P.S.

Another text on the topic of dollar-oil-gold and the expected
peak of oil production:

http://www.monacorarecoins.com/rare-coin-news/article/the-us-dollar-oil-gold-relationship/

4  Economy / Goods / High-quality photographic prints of meditative landscapes on: July 01, 2011, 05:58:21 AM
The young photographer Anja Putensen offers high-quality prints of artistic landscape images:

http://cerezal.selfip.net/Prints4Sale/

The pictures show quiet, almost enchanted landscapes which reflect inner and outer worlds in an emphatic way.

Anja Putensen studied, among others, with Peter Bialobrzeski and Wolfgang Zurborn at "Hochschule der Künste" in Bremen and with Eva Bertram at Berlin "Neue Schule für Fotografie".

The prints offered are large-format, high-quality reproductions on Aluminium-Dibond material. This composite material combines brilliance, low weight and stiffness and is excellently suited for a frameless presentation. The pictures will play a role as an eye-catcher in larger, quietly designed rooms or as an gift with a very special value.

If required, I can confirm offers by digital signatures. -- Joise
5  Local / Biete / "Innere Landschaften": Hochwertige Prints von künstlerischen Fotografien on: June 30, 2011, 05:47:02 AM
Die Hamburger Fotografin Anja Putensen bietet auf Ihrer Seite hochwertige Prints von künstlerischen Fotografien an:

http://cerezal.selfip.net/Prints4Sale/index.html

Die Fotos zeigen stille, verzaubert wirkende Landschaften, die Innenwelten und Außenwelten einfühlsam reflektieren.

Anja Putensen studierte Fotografie u.a. als Studentin von Peter Bialobrzeski und Wolfgang Zurborn an der Hochschule der Künste in Bremen und als Studentin von Eva Bertram an der Neuen Schule für Fotografie in Berlin.

Die angebotenen Prints sind großformatige hochwertige Abzüge auf Aluminium-Dibond. Das ist ein Verbundmaterial, das wegen seiner Brillianz, Leichtigkeit und Stabilität in Ausstellungen verwendet wird und für eine rahmenlose Aufhängung geeignet ist. Die Bilder eignen sich gut als Blickfang in größeren, ruhig gestalteten Räumen oder als ganz besonderes wertvolles Geschenk.

Ich kann Angebote bei Bedarf digital signieren.
6  Bitcoin / Bitcoin Discussion / Get Bitcoin Software Distribution right on: June 27, 2011, 08:59:43 PM
There seem to be so many people there who are burned by using
Bitcoin on Windows...

Here is my idea what could be better:

An image which can be downloaded and installed on an USB memory
stick, just like the Ubuntu installer. But with almost no software except the
Bitcoin client. Everything hardened with SELinux and the like. No use of
swap which could leak keys. Maybe a safe browser if such a thing exists.

One copies the image to an USB stick and boots the computer with
that.  The Bitcoin client is preinstalled and looks automatically for
updates. Before first use, one is asked for another USB stick to which
everything is cloned for a backup.

It could even be sold as a ready-made stick with some amount
pre-loaded, like a pre-paid phone card, administering a
mass market. The receiving address printed on the package, of
course. Perhaps with a pay code for charging with money by a
simple bank transfer. Think in a country with a failing
currency - how would it be most accessible?

It's, of course, overkill for only buying a few post cards in a
web shop. But to store a few hundred bucks safely, this
could be just the right thing to do, and might be a commercial
success.

Any flaws in this ?
7  Local / Deutsch (German) / Überarbeitung der Liste der deutschsprachigen Händler im Wiki on: June 19, 2011, 01:15:27 PM
Hallo,

ich habe die Seite

https://de.bitcoin.it/wiki/Handel

erstens mit der Seite "Trade" zusammengeführt und zweitens nach
dem Vorbild der englischen Geschwisterseite etwas geordnet und
stärker gegliedert.

Meine Bitte: Wann immer ihr ein interessantes deutschsprachiges Geschäft
seht, das Bitcon akzeptiert, nutzt die Gelegenheit, die Liste zu erweitern.

Ich denke, jeder kleine oder mittlere Händler hat im Endeffekt Vorteile,
wenn er in einem solchen Verzeichnis steht. Das ist genauso wie
bei einem Wochenmarkt.

Es ist natürlich nichts dagegen einzuwenden, wenn es weitere freundliche
Verzeichnisse gibt, wie go-bitcoin.com. Zum Beispiel können diese ein
besseres Design bieten als das Wiki oder ein Händler-Bewertungsverzeiches
oder vieles andere.

Für die Community hat es aber Vorteile, wenn es einen gebührenfreien
offenen Marktplatz gibt, deswegen helft mit, das Wiki auszubauen!

Joise
8  Other / Beginners & Help / Proposal: Better authentication for online trading sites like MtGox on: June 19, 2011, 08:08:19 AM
I have read several messages stating that accounts at MtGox
became compromised.

While I can't verify them, I think it's a really Bad Idea to
link password recovery to email security by sending a recovery
password for a trading site to a mail account. Mail accounts are
checked most frequently and in all possible places. People are
apt to use weak passwords for mail. Login credentials
may be sniffed when using WiFi connections on mobile
devices. Computers of other people may be used where
keyloggers and trojans are already in place.
Once your mail account is stolen, your trading
account is compromised as well.

What I propose is to use PGP/GnuPG signatures for
re-authentication of accounts and mTAN for auhtentication of
transactions. That would work as follows:

1) First you need to generate a PGP key with your
favorite software. If you want good security,
you will move the keys to a SmartCard device, which
are sold by various non-governmental entities.

2) When you register to an online trader, you can
enter your PGP keyid and public key. You can also
check the fingerprint of the key you just did upload.
Password reset by email would be switched off.
The key will be bound to the tradings account so that
a new key can replace the exiting one only if it is
signed by it.

3) In case you lose your password, you enter your
user ID and key ID at a web form. The trading site
gives you an authentication phrase and asks you to sign
it with your secret PGP key.
When you upload the signed phrase, the signature
is verified and you can enter a new password.

4) A further, very important improvement would be
to use an adption of the well-established mTAN principle.
With this, you register the number of a mobile phone at your
trading account and sign it with your PGP key. Then, every
transaction will be authenticated that way that a five-digit code is
sent by SMS to your mobile device. Only after you enter
that code, the transaction is done. This is much
more secure than password-only authentication.

Advantages of GPG authentication:

- Does not rely on weak email security
- Does use existing infrastructure and well-established,
  thoroughly audited software
- Preserves anonymity, but would also fit nicely in
  GPG-based Webs of Trust
- Allows for two-factor authentication by Open Hardware
- Can be provided as an opt-in solution. People who
  don't care for more security don't have to use it.

Advantages of mTAN authentication for transactions:

- easy to use
- well-established in many places
- prevents theft by keyloggers

Joise
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