Bitcoin Wiki - User contributions [en]

Talk:Main Page

2012-02-13T14:10:47Z

MandM: /* A bit cleanup ok? */ new section

== Protect main page ==

The main page is the perfect opportunity for vandalism. Although having it unprotected allows everyone to improve it (which is uncommon), the risk is too great when the edit could just be done by an administrator. [[User:X|X]] 11:27, 7 January 2012 (GMT)

== Header capitalisation ==

Please refrain from using Initial Caps in your titles. Use One initial cap; it's the style in current usage.
For names such as Bitcoin Market, capitalise each letter of the word only for that name
e.g "How to use Bitcoin Market".[[User:Genjix|Genjix]] 07:23, 30 December 2010 (GMT)
:Lets stick to the [http://en.wikipedia.org/wiki/Wikipedia:Naming_conventions_(capitalization) Wikipedia style guide]. [[User:Genjix|Genjix]] 21:07, 9 January 2011 (GMT)

== Fonts for source code ==

MT, can you make the fonts bigger? I can hardly see the fonts for the <source> snippets. Thanks. [[User:Genjix|Genjix]] 07:23, 30 December 2010 (GMT)
: For the source snippets, this can be done by editing [[MediaWiki:Geshi.css]] I guess, use the discussion page there [[User:MagicalTux|MagicalTux]] 14:59, 31 December 2010 (GMT)
::Thanks. I didn't know about that- well you've sorted it now anyway ;) [[User:Genjix|Genjix]] 21:09, 9 January 2011 (GMT)

==Further Languages==

There now are wiki URLs here for two languages in addition to English. How do bitcoin wikis for additional languages get started? For example, there are a number of bitcoin users whose primary language is spanish. Bitcoin has a number of German language readers too ... for example [http://www.go-bitcoin.com Go-Bitcoin]]. [[User:sgornick]] 18:01, 8 February 2011 (GMT)
: Those informations are available on the [[Bitcoin.it Wiki]] page. [[User:MagicalTux|MagicalTux]] 08:30, 16 February 2011 (GMT)

== Recent Changes showing New Users ==

Would an administrator please remove new users from the recent changes? It generally clogs it up and isn't helpful for editors. Thanks! --[[User:Firestorm|<tt><big>'''Firestorm'''</big></tt>]] 05:10, 26 May 2011 (GMT)

== Contents of "Topic central" ==
I suggest adding "services". [[User:Phelix|Phelix]] 12:30, 15 September 2011 (GMT)

This link should be displayed more prominently. Maybe something like: "spend coins". Also "trade" is very misleading because it is easy to think of trading bitcoins on an exchange but not buying goods and services.
https://en.bitcoin.it/wiki/Trade

== Description of Bitcoin ==
The description of bitcoin is similiar to wikipedia article.--[[User:Kiba|Kiba]] 19:53, 16 December 2010 (GMT)
: It seems that the beginning of the introduction was made by Grondilu (french guy who sometimes comes on irc and auctions gold on the forum), see [http://en.wikipedia.org/w/index.php?title=Bitcoin&diff=402269158&oldid=402260422]. Since most of the bitcoin article on wikipedia was put together by the bitcoin community, it shouldn't be too difficult to have them accept publication here. In the meantime I see no harm keeping this for a few days, until we either get explicit authorization, or rewrite it into something more personnal. [[User:MagicalTux|MagicalTux]] 21:47, 16 December 2010 (GMT)
:: In the meantime I have added a "wikipedia" source, thru adhering with the wikipedia CC by-sa license. [[User:MagicalTux|MagicalTux]] 21:49, 16 December 2010 (GMT)
:::Authorisation isn't needed. We're complying with the Wikipedia license by sourcing their work. Shouldn't matter. [[User:Genjix|Genjix]] 03:31, 19 December 2010 (GMT)

I don't like "the idea of using digital files as money" -- maybe "the idea of using digital information as money" ? 'files' has too specific a meaning in the computer context. Then again, most dollars and euros and other conventional currency are nothing but accounting entries in various databases.--[[User:Gavinandresen|Gavin Andresen]] 16:20, 22 December 2010 (GMT)
: Maybe using with "bits of data"? (it's BITcoin after all). Anyway "files" doesn't seem appropriate... [[User:MagicalTux|MagicalTux]] 12:25, 23 December 2010 (GMT)
::"bits of data" sounds equally weird. I changed it to information. However, is it really information? Information is supposed to be human-readable quantitative data, whereas data is the raw stream... It doesn't fit data or information as it's a solution to a mathematical operation. We could write "the idea of using computed solutions to mathematical problems as money". [[User:Genjix|Genjix]] 16:38, 23 December 2010 (GMT)
:::Ok, on second thought, I changed it. [[User:Genjix|Genjix]] 16:39, 23 December 2010 (GMT)

== A bit cleanup ok? ==

Hi, during my learing phase esp. next week I would like to do some minor cleanups on the wiki (categorization, Renaming, formating, ...) as I guess it might be wise if somebody with a fresh mind would take a look on the articles. Is that ok for you or is this wiki a bit more 'discuss first and edit after that' ? --[[User:MandM|MandM]] 14:10, 13 February 2012 (GMT)

Smart card wallet

2011-11-02T14:51:49Z

MandM: cat

This pages gathers resources for the implementation of a Bitcoin wallet on a smart card.

===Rationale===

*Computers and smartphones are target for malware. The software on a smart card can be protected.
*Smart cards do not need a battery, nor internet connection, they are robust.
*Adoption: people are already used to pay with smart cards.

===Desired features===

*no blockchain, no node; the card contains only private keys, and an algorithm to sign a transaction
*the smart card should have its own keyboard (for pin code protection) and display (to show the transaction amount)
*the card should implement a deterministic wallet, so that funds can be recovered if the card is lost.

===Usage scenario===

* the reading device may belong to a merchant at a point of sale; it cannot be trusted with private keys.
* the reading device is connected to a full bitcoin node; it can be trusted for getting and sending blockchain information.
* the reading device sends to the card the current balance of its bitcoin addresses. This information can be cached in the card.
* the reading device sends a bitcoin receiving address and transaction amount to the card.
* the amount is displayed by the card ; the user confirms the transaction with his pin code.
* the smart card creates a signed transaction and sends it to the reading device
* the transaction is checked and broadcast by the bitcoin node.

==Implementation steps==

===1. write a bitcoin daemon that can talk to a lightweight wallet===
*this has been done already, see for example bitcoinjs: https://github.com/bitcoinjs/bitcoinjs-lib
*See also this pull request: [https://github.com/piotrnar/bitcoin/tree/importexporttx importexporttx] can be used to broadcast the transaction
* https://bitcointalk.org/index.php?topic=28278.msg383312#msg383312

===2. write a lightweight wallet===
*wallet without blockchain, in order to test the daemon
*this lightweight wallet will be later implemented on the card
*use it to define the communication protocol between card and reading device.

===3. implement wallet on a simple smart card===

* http://www.opensc-project.org/opensc openSC : tools and libraries for smart cards.
* amadousarr.free.fr/crypto/ECDSAJAVACARD.pdf : A Software Implementation of ECDSA on a Java Smart Card
* http://www.acs.com.hk : cards, readers, development kits; no display, pincode needs to be typed on the reading device

===4. implement wallet on a smart card with display and pincode ===

list of vendors:
* http://www.nidsecurity.com/products/solution-enterprise.html (smart cards with LCD displays)
* http://www.avesodisplays.com/ (smard cards with flexible displays)

==references==
*https://bitcointalk.org/index.php?topic=7539.0 Bitcoin smartcard Point of Sale terminal
*https://bitcointalk.org/index.php?topic=20933.0 Bitcoin and Smart Cards

[[category:Developer]]
[[category:Technical]]
[[category:Wallets]]
[[Category:Mobile]]

Research

2011-11-02T13:55:38Z

MandM: cat, +bc stick

Publications including research and analysis of Bitcoin or related areas.

==See Also==

* [[:Category:Economics|Economic]]
* [[:Category:Technical|Technical]]

==External Links==

* [http://www.bakerinstitute.org/publications/ITP-pub-FinancialTransactions-082911.pdf Shadowy Figures: Tracking Illicit Financial Transactions in the Murky World of Digital Currencies, Peer–to–Peer Networks, and Mobile Device Payments] 2011-08-29 by John Villasenor, Cody Monk and Christopher Bronk
* [http://david.bronleewe.net/bitcoin-nfc/bitcoin-nfc.pdf Bitcoin NFC] 2011-08 by David Allen Bronleewe ([http://code.google.com/p/bitcoin-nfc source])
* [http://bitcoil.co.il/pool_analysis.pdf Analysis of Bitcoin pooled mining reward systems] 2011-08-04 by Meni Rosenfeld ([http://bitcointalk.org/index.php?topic=32814.0 discussion])
* [http://arxiv.org/abs/1107.4524 An Analysis of Anonymity in the Bitcoin System] 2011-07-22 by Fergal Reid, Martin Harrigan ([http://bitcointalk.org/index.php?topic=31539.0 discussion])
* [http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1817857 Bitcoin: An Innovative Alternative Digital Currency] 2011-04-21 by Reuben Grinberg, Yale ([http://www.bitcoin.org/smf/index.php?topic=6247.0 discussion])
* [http://bitcoin.atspace.com/poolcheating.pdf Optimal pool abuse strategy] 2011-02-04 by Raulo ([http://www.bitcoin.org/smf/index.php?topic=3165.0 discussion])
* [http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1721076 2011 Observations on the Digital Currency Industry] 2011-01 by Mark Herpel for DGC Magazine
* [http://www.bitcoinservice.co.uk/files/111 Abusing Bitcoin cooperative mining pools: strategies for egoistical but honest miners] 2011-01 by Nakamoto Ryo ([http://www.bitcoin.org/smf/index.php?topic=2941.0 discussion])
* [http://www.bitcoin.org/bitcoin.pdf Bitcoin: A Peer-to-Peer Electronic Cash System] 2008-10-31 by [[Satoshi Nakamoto]]
* [http://iang.org/papers/triple_entry.html Triple Entry Accounting] by Ian Grigg
* [http://osaka.law.miami.edu/~froomkin/seminar/papers/bortner.htm Cyberlaundering:Anonymous Digital Cash and Money Laundering] 1996 by R. Mark Bortner
* [[Bitcoin stick]] by Prof. Cap

[[Category:Research]]

Bitcoin stick

2011-11-02T13:54:42Z

MandM: research about a mobile BC client

At the chair "Informations- und Kommunikationsdienste" at the University of Rostock a team tries to bring Bitcoin on a idsolated mobile platform.

Idea: "As BC becomes more popular it becomes a worthwhile target for attackers. As we don't focus on any fraud on [[mining]], this project aims to prevent the [[Wallet]] by creating a boxed and locked enduser wallet, that is trustworthy to the owner."

==History==
*09/2011 planing and collecting ideas
*10/2011 evaluating different microcontroller kits

[[Category:Research]]
[[Category:Mobile]]

User:MandM

2011-11-02T13:37:02Z

MandM: first idea

Matthias is a student at the University of Rostock at the chair of "Informations- und Kommunikationstechnik" (Prof. Cap). Besides his work on Bitcoin, he is interested in several other Open projects:
*OpenStreetMap
*OpenPandora
*Microcontrollers

He works on
* [[Bitcoin stick]]