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{{Termin
 
{{Termin
 
|date=2012/02/01 20:00:00 PM
 
|date=2012/02/01 20:00:00 PM
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solutions and proposes questions for discussion for the properties of
 
solutions and proposes questions for discussion for the properties of
 
electronic money system.
 
electronic money system.
== Electronic money: The road to Bitcoin and a glimpse ahead ==  
+
=== Electronic money: The road to Bitcoin and a glimpse ahead ===
 
Abstract : *The proposed talk provides a definition of the problem of
 
Abstract : *The proposed talk provides a definition of the problem of
 
creating e-money and after a review of the state of the art points out
 
creating e-money and after a review of the state of the art points out
 
possible solutions and proposes questions for discussion for the
 
possible solutions and proposes questions for discussion for the
 
properties of electronic money system.*
 
properties of electronic money system.*
== 1. What is electronic money and different means of currency ==  
+
=== 1. What is electronic money and different means of currency ===
 
Definition of electronic money and distinction from similar means of
 
Definition of electronic money and distinction from similar means of
 
exchange.
 
exchange.
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*Optional*: Pros and cons of the abovementioned means of exchange.
 
*Optional*: Pros and cons of the abovementioned means of exchange.
== 2. Defining the e-money problem: What electronic money should do?
+
=== 2. Defining the e-money problem: What electronic money should do? ===
==  
+
 
Risks and requirements to the solution for electronic money from
 
Risks and requirements to the solution for electronic money from
 
technical, legal and business standpoint. The basic human problem of
 
technical, legal and business standpoint. The basic human problem of
 
reaching a consensus and trust in a group.
 
reaching a consensus and trust in a group.
== General system risks: ==  
+
=== General system risks: ===
  
 
+ Credit Liability
 
+ Credit Liability
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+ Secrecy
 
+ Secrecy
  
== Legal and accounting: ==  
+
=== Legal and accounting: ===
  
 
+ Dispute resolution
 
+ Dispute resolution
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+ How the burden of proof is distributed
 
+ How the burden of proof is distributed
  
== Business: ==  
+
=== Business: ===
 
Costs for:
 
Costs for:
  
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+ Customer and merchant negotiation
 
+ Customer and merchant negotiation
  
== Accent on the most important human problems: ==  
+
=== Accent on the most important human problems: ===
  
 
+ Identification and authorization (which is the required minimum?)
 
+ Identification and authorization (which is the required minimum?)
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+ Trust (between the peer users or trust in the central authority)
 
+ Trust (between the peer users or trust in the central authority)
  
== 3. How the risks and requirements have been traditionally
+
=== 3. How the risks and requirements have been traditionally addressed? ===
addressed? ==  
+
 
Review of the cryptographic, legal and procedural methods from the
 
Review of the cryptographic, legal and procedural methods from the
 
existing e-money protocols. Еmphasis on anonymity and privacy
 
existing e-money protocols. Еmphasis on anonymity and privacy
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*Optional*: Few words for Blind signature and PayWord techniques and
 
*Optional*: Few words for Blind signature and PayWord techniques and
 
the protocols around them
 
the protocols around them
== 4. The great step forward. The contribution of Bitcoin ==  
+
=== 4. The great step forward. The contribution of Bitcoin ===
 
Emphasis on decentralization and (relative) anonymity features of
 
Emphasis on decentralization and (relative) anonymity features of
 
Bitcoin. How the combination of a way to create(mint) coins and to
 
Bitcoin. How the combination of a way to create(mint) coins and to
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non-centralised currency. What, in my opinion, contributed for the
 
non-centralised currency. What, in my opinion, contributed for the
 
Bitcoin popularity.
 
Bitcoin popularity.
== 5. The problems of Bitcoin ==  
+
 
 +
=== 5. The problems of Bitcoin ===
 
What Bitcoin doesn't provide or doesn't provide in an effective
 
What Bitcoin doesn't provide or doesn't provide in an effective
 
manner:
 
manner:
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Is it decentralized or distributed system? (having in mind the
 
Is it decentralized or distributed system? (having in mind the
 
introduction of "trust points")
 
introduction of "trust points")
== 6. A Glimpse forward ==  
+
=== 6. A Glimpse forward ===
 
How can anonymous e-money be made better (more effective and
 
How can anonymous e-money be made better (more effective and
 
accessible). Proposal (and discussion) of the possible enchancements.
 
accessible). Proposal (and discussion) of the possible enchancements.
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How do these solution relate to the speed the new money are accepted
 
How do these solution relate to the speed the new money are accepted
 
and used?
 
and used?
== How to reach a consensus in a group in a more effective manner? ==  
+
=== How to reach a consensus in a group in a more effective manner? ===
  
 
+ Is practical byzantine tolerance more effective than distributed
 
+ Is practical byzantine tolerance more effective than distributed
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+ How triple accounting techniques may help?
 
+ How triple accounting techniques may help?
  
== How to achieve anonimity and preserve privacy? ==  
+
=== How to achieve anonimity and preserve privacy? ===
  
 
+ Is complete anonymity possible? What are the achievable levels of
 
+ Is complete anonymity possible? What are the achievable levels of

Version vom 23. Januar 2012, 19:59 Uhr


Chaotic Congress Cinema Nr. 4

Beginn:

The date "2012/02/01 20:00:00 PM" was not understood.The date "2012/02/01 20:00:00 PM" was not understood.

Ende:

The date "2012/02/01 22:00:00 PM" was not understood.The date "2012/02/01 22:00:00 PM" was not understood.


Needs to be there, but does not need to be seen by a visitor Yes

Wir schauen uns die Aufzeichnung von Congress-Vorträgen an. Du bist herzlich eingeladen, in den Clubräumen im Mexikoring 21 aufzutauchen und mit uns die Talks anzuschauen und zu diskutieren. Es wird Getränke und Knabberkram zu moderaten Preisen geben. Falls Du kein CCC-, CCCHH- oder Attraktor e.V.-Mitglied bist, macht das überhaupt nichts: Alle Gäste sind gern gesehen. :-)

Weitere Informationen unter Chaotic Congress Cinema.

Cellular protocol stacks for Internet

GPRS, EDGE, UMTS, HSPA demystified

Almost everyone uses the packet oriented transmission modes of cellular networks. However, unlike TCP/IP, Ethernet and Wifi, not many members of the hacker commnunity are familiar with the actual protocol stack for those services.

This talk is aimed to give an in-depth explanation how the lower layer protocols on the air and wired interfaces for packet data services in cellular networks are structured.

For 2.5/2.75G, this includes RLC/MAC, NS, BSSGP, LLC, SNDCP, GTP For 3G/3.5G, this includes RRC, RLC, PDCP, NBAP, RANAP

Links

+ `OpenBSC project (includes OsmoSGSN)

 <http://openbsc.osmocom.org/>`__

+ `http:// <http://>`__



Electronic money: The road to Bitcoin and a glimpse forward

How the e-money systems can be made better

The proposed talk provides a definition of the problem of creating e-money and after a review of the state of the art points out possible solutions and proposes questions for discussion for the properties of electronic money system.

Electronic money: The road to Bitcoin and a glimpse ahead

Abstract : *The proposed talk provides a definition of the problem of creating e-money and after a review of the state of the art points out possible solutions and proposes questions for discussion for the properties of electronic money system.*

1. What is electronic money and different means of currency

Definition of electronic money and distinction from similar means of exchange.

Electronic money is defined as monetary value which is:


+ stored on an electronic device; + issued on receipt of funds; and + accepted as a means of payment by persons other than the issuer.


Working e-money examples: PayPal and MoneyBookers

Other means of exchange, similar to e-money: Alternative/Social/Timeshare/Community currencies; Loyalty and Voucher systems. > Working examples: WIR and Ven currencies (Bitcoin)< p> What makes them different from e-money? (convertible only one-way, not a legal tender, mostly backed by trust only, etc)

  • Optional*: Pros and cons of the abovementioned means of exchange.

2. Defining the e-money problem: What electronic money should do?

Risks and requirements to the solution for electronic money from technical, legal and business standpoint. The basic human problem of reaching a consensus and trust in a group.

General system risks:

+ Credit Liability + Credit Abuse + Counterfeiting + Unauthorized Withdrawal + Purchase Order Modification + Double Spending + Failure to Credit Payment + Denial of Service + Repudiation + Failure to deliver + Framing + Secrecy

Legal and accounting:

+ Dispute resolution + Money laundering and finance of terrorism + Tax evasion prevention + Consumer protection requirements + Ways to negotiate and conclude a contract + Auditability + Reverse and chargeback transactions + How the burden of proof is distributed

Business:

Costs for:


+ Registration + Operation + Support + Marketing + Customer and merchant negotiation

Accent on the most important human problems:

+ Identification and authorization (which is the required minimum?) + Achieving consensus and easy dispute resolution in a group. + Determine the state of the system at any given moment + Trust (between the peer users or trust in the central authority)

3. How the risks and requirements have been traditionally addressed?

Review of the cryptographic, legal and procedural methods from the existing e-money protocols. Еmphasis on anonymity and privacy problems.

The review of the existing systems will be a distinction between:


+ Online and offline systems > Example: PayPal and Blind signature

 PayWord based systems

+ Centralized and decentralized systems > Example: Liberty Reserve and

 Ripple BitCoin

+ Hard and Soft systems > Example: BitCoin and Credit card based money

 and payment protocols< li>


How do they solve the problems of trust and consensus in a certain group?

How they provide anonymous transactions and keep user privacy? Are independent jurisdictions a (contribution to) the solution?

Calculated risk, insurance and responsibility/role delegation as patches to the existing problems.

Which of the above systems may be deemed "legal"? (what do the central banks think)

  • Optional*: Few words for Blind signature and PayWord techniques and

the protocols around them

4. The great step forward. The contribution of Bitcoin

Emphasis on decentralization and (relative) anonymity features of Bitcoin. How the combination of a way to create(mint) coins and to timestamp the state of their distribtion created the first working non-centralised currency. What, in my opinion, contributed for the Bitcoin popularity.

5. The problems of Bitcoin

What Bitcoin doesn't provide or doesn't provide in an effective manner:


+ Cost of creating money + Method of reaching a consensus, based on computing power + No "real value" to back it + Settlement risk not covered + Scalability issues + All the lacking features of a "soft" currency


Is it decentralized or distributed system? (having in mind the introduction of "trust points")

6. A Glimpse forward

How can anonymous e-money be made better (more effective and accessible). Proposal (and discussion) of the possible enchancements.

How to issue e-money in more effective manner?

Possible solutions are to issue money based on:


+ Exchange for FIAT money or back by any other valuable stock (gold,

 land, silver);

+ IOU credit/debit principle from the community currencies; + Some fair distribution as an alternative to: + Solving a math problem (as Bitcoin does)


How do these solution relate to the speed the new money are accepted and used?

How to reach a consensus in a group in a more effective manner?

+ Is practical byzantine tolerance more effective than distributed

 timestamping?

+ Can and should we consider any centralized authority? + Should we consider decentralized money impossible and settle for

 distributed money?

+ Can a Webtrust (OpenPGP alike) scheme of trust be applied? What

 social identification (friend of a friend) can contribute?

+ Can we use/rely on public/official timestamping services and how

 this can be used as a better proof?

+ How triple accounting techniques may help?

How to achieve anonimity and preserve privacy?

+ Is complete anonymity possible? What are the achievable levels of

 anonymity?

+ Can the user set a "mode" of a transaction, sacrificing some

 protection?

+ To what extend the existing bank secrecy will suffice? + Jurisdictional independence as a possible solution / significant

 contributor.

+ What anonymizing technical methods are possible?


More general question: Should a good e-money currency be made according to the legal requirements of the EU directive and made legal tender?

If not are features like: consumer protection (reverse and refund transactions), auditability and settlement risk coverage need to be implemented and at what cost?