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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.
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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?