Archiv der Kategorie: Allgemein

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Trezor is a secure hardware wallet for crypto currencies


Trezor dubs itself “the original and most secure hardware wallet” and it’s highly regarded by hodlers. Available in black or white for around $109 a pop, the device will allow you to store all your ERC20 tokens together with almost two dozen coins including BTC, BCH, LTC, DASH, and ZEC. Water-resistant and sturdy, the Trezor features a small display for confirming transaction details, 2FA, password manager, and a bunch of other features.

Ledger Nano S

Ledger Nano S

Small and lightweight, the Nano S by Ledger will hold bitcoin, ethereum, and several other altcoins. Like the Trezor, the Nano S is highly rated by the crypto community, and this week Ledger celebrated selling its one millionth Nano S. The device uses a small OLED display and side buttons that are pushed to confirm transactions. If you want to get your hands on one you’ll need to be patient though – the next units aren’t scheduled to ship until late March.

Bank Blockchain Integration: A Challenge Overcome

For the past couple of years, there has been an extraordinary

amount of hype around the potential of blockchain (or more correctly distributed ledger technology) to transform the banking industry. The reason for this hype is quite profound: DLT has given us the opportunity to rearchitect the financial industry. In the years ahead, we will move from a system of many banks with many ledgers (with all the associated reconciliation, central clearing parties, auditing, etc) to a simpler system of many banks but fewer ledgers where reconciliation is automatic. Central clearing parties may no longer be necessary and regulators will have a real-time view of the positions and risks across the industry.

But this transition, if it finally happens, is going to take a long time, and the chief reason is simple: legacy bank infrastructure and the tens of billions of dollars that have already been spent on building that infrastructure. The core bank systems of today, designed with security in mind, are extremely robust and secure. But as a result, they sacrifice flexibility and aren’t exactly friendly in how they communicate with other technologies. Luckily though, over the past several years, the APIs of core bank systems have been upgraded to be REST-compliant and some even support events and web sockets. So, integrating a DLT platform with a core bank system can be relatively straightforward even though the underlying DLT network topology, architecture and security considerations may still be a work in progress.

Keeping it simple

The key to any successful integration is to minimize complexity. Certain use cases and transaction processes (e.g. cross-currency swaps) are complex and touch upward of 20 computer systems. And although very promising for the application of DLT, they may not be the obvious place to start as we move forward with the first real-money pilots. Other transaction processes like cross-border payments are simpler, and it is these kinds of applications that are probably the closest to production. So, how do integrations work in practice? At Banco Santander, our Blockchain Lab starts by building a prototype to tackle a specific business problem on a particular DLT platform (ethereum, Hyperledger Fabric, R3’s Corda). In order to make the prototype as close as possible to the real thing, first we will build a limited core bank simulator that emulates the core bank systems for that particular application.

Next, we will map out the process flow for the use case that we are building and then spend the next two to three months in a series of sprints that result in an application that is robust enough to demonstrate to the business. If the business leaders like what they see, they may support taking the application to the next phase: pilot. At Santander when we say „pilot,“ we mean running the application on real money systems, though at limited scale. (The pilot phase is when the bank’s IT teams – corporate IT and ops, security, infrastructure – get involved.)

Together, we will do an architecture and security review of the prototype application and figure out all the necessary modifications that will need to be made to plug it into the bank’s pre-production environment. But because we have already been building on core bank simulators, connecting to the real core bank systems becomes significantly easier. These pilot integrations have been taking us four to 12 weeks, depending on the amount of work involved.

Once the pilot integrations have been done, performing a robust series of tests on a defined schedule is the next step. It is during these tests that bugs are identified and squashed. The chief concern here is maintaining atomicity between the core bank system and the blockchain. In other words, it is imperative that the numbers that are reflected in the core bank are exactly the same as the numbers that are present in the blockchain. In practice, though, this is not too difficult to achieve and the two systems play quite nicely with each other. Very nicely, in fact.

A sample use case

A good example of a hypothetical integration process might be the development of a killer app like digital cash (aka a „fiat-backed stablecoin“ in industry parlance) that will support micropayments, pay-per-download of digital content and the natural extension of Internet of Things, the machine-to-machine economy. Digital cash as a concept is not new and has been tried before, starting with the original Ripple gateways in 2013 and followed by later attempts like BitAssets that involved backing the stablecoin with a non-fiat asset.

More recent efforts like basecoin are at the white paper stage, with theoretical approaches to creating an algorithmically backed stablecoin. And, while we are waiting for central banks to issue digital versions of their own currencies (very possible, but unlikely to happen for quite some time) existing commercial banks could get the ball rolling. So, what integrations would be needed to deploy a fiat-backed stablecoin? First, we would have to identify the components and integration points needed for a simple tokenized digital cash system as follows:

  • User wallet:
    The user registers his or her blockchain wallet with the digital cash platform. Know your customer(KYC) checks would be performed at this time. An integration with a KYC system is required.
  • Escrow account:
    The account at the bank where the funds from all the different users are pooled. Segregation of those funds happens on the distributed ledger.
  • Tokenizer:
    The interface between the core bank system and the blockchain. This application detects incoming transfers to the escrow account and creates the matching amount of digital tokens in the user’s wallet. It also handles redemptions of tokens and triggers their destruction and the corresponding transfer of real funds from the escrow account back to the user’s bank account.
  • Transactions:
    These occur directly between user wallets on the blockchain. No integration as such is needed, although regulations may require that both wallets conduct KYC in advance and anti-money-laundering (AML) screening might be required for transactions above a certain size

From a technical point of view, building a digital cash application is quite straightforward. Very few integrations with core bank systems are required. The „tokenizer“ does most of the work, with KYC and AML being done off-chain if needed. Of course, there are many legal and regulatory challenges that will need to be overcome before bank-backed digital cash becomes a reality on public blockchains.

But for blockchains, particularly smart contract platforms, to reach their true potential and become an integral part of the lives of the Earth’s 7 billion people, enabling tokenized versions of real money is an essential step. Admittedly some of the technology is not quite ready to support digital cash at scale. But the good news is that from an integration point of view at least, creating a fiat-backed stablecoin might not be too difficult. In fact, it might be the easiest integration of all.


Make free Bitcoin month after month

Join our group of entrepreneurs

Our mentor, Tom Prendergast teaches you how to command the Internet to make free Bitcoin month after month, as much as 1 Bitcoin per month. He is doing it and has semi-automated it so you can too.
He spends at least two hours from 10am to 12 noon (central) on Saturdays taking you from „Zero to Hero“. Join us or watch the magic in action. Tell your friends. It is free, every level. Learn from the masters.

Calendar and Webinarroom access at:

Join markethive here:  

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Bankautomaten für Bitcoin weltweit

Südkoreas Hyosung, einer der größten ATM-Hersteller in Asien, der ebenfalls seinen Hauptsitz in Texas hat, hat offiziell Bitcoin in seine internationalen ATM-Modelle eingebaut.

Südkoreas Hyosung, einer der weltweit größten Geldautomatenhersteller, der vor Jahren die # Bitcoin-Unterstützung im Inland eingeführt hat, hat endlich #bitcoin in sein internationales ATM-Modell für Einzelhändler integriert.

Bedeutung von Hyosungs Bitcoin-Integration

Seit 2014 kooperiert Hyosung mit führenden Bitcoin-Dienstleistern in der südkoreanischen Kryptowährungsbranche wie dem Tim Draper-Coinplug. Seit mehr als drei Jahren ermöglicht Hyosung südkoreanischen Geldautomatenbenutzern den Kauf und Verkauf von Bitcoins über Zehntausende von Hyosung-Geldautomaten, die sich in fast allen Geschäften und U-Bahnstationen befinden.

Durch die mobile App Coinplug hat Hyosung es südkoreanischen Nutzern ermöglicht, Bargeld abzuheben und einzuzahlen, um Bitcoin zu verkaufen oder zu erhalten, wodurch die Liquidität von Bitcoin für die allgemeinen Verbraucher in der Region erhöht wird. Wie auf dem Foto unten zu sehen ist, haben die Bemühungen von Coinplug und Hyosung, viele der bestehenden Bank-Geldautomaten in Südkorea zu Bitcoin-unterstützenden Geldautomaten zu transformieren, zu einer zunehmenden Akzeptanz von Bitcoins in der breiten Masse geführt. In den kommenden Wochen plant Hyosung die vollständige Integration von Bitcoin in seine internationalen ATM-Modelle, die an unterstützende Länder wie die USA und die meisten europäischen Länder ausgeliefert werden.





Vorteile von Geldautomaten, die Bitcoins unterstützen

Seit 2016 haben die meisten führenden Bitcoin-Märkte und ihre Behörden Bitcoin-Börsen und Handelsplattformen unter Druck gesetzt, strenge KYC- (Know Your Customer) und Anti-Geldwäsche- (AML-) Richtlinien zu erzwingen, um illegale Anwendungsfälle von Bitcoin und anderen Kryptowährungen wie Ethereum und Litecoin zu unterbinden.

Folglich ist der Prozess der Kontobestätigung und Aktualisierung der täglichen oder monatlichen Limits von Bitcoin-Handelskonten zu einer erheblichen Herausforderung geworden. An den meisten Börsen müssen Benutzer mindestens ein paar Wochen damit verbringen, notwendige Dokumente einschließlich persönlicher Verifizierung (IDs oder Reisepässe), Bankdokumente einzureichen und sogar ein persönliches Interview für maximale monatliche Limit-Upgrades durchzuführen. Für große Trader und Investoren lohnt es sich, einen solch strengen Verifizierungsprozess zu durchlaufen, um Handelskonten zu erstellen. Für Anfänger und Gelegenheitsinvestoren sind Bitcoin-Geldautomaten jedoch wesentlich einfacher zu verwenden, um kleine Mengen an Bitcoin zu kaufen und zu verkaufen.

Derzeit konzentrieren sich große Bitcoin-Broker und Börsen wie Coinbase und Gemini auf die Unterstützung von institutionellen und privaten Anlegern. Cointelegraph berichtete kürzlich, dass Coinbase Coinbase Custody, eine Bitcoin-Depotbank für institutionelle Anleger, die einen Mindestbetrag von 10 Milliarden Dollar in Bitcoin investieren wollen, eingeführt hat. Eine Handvoll Unternehmen, darunter der Philippinen, der größte Bitcoin-Broker in Asien mit fast 3 Millionen aktiven Nutzern, arbeiten daran, Dienstleistungen für allgemeine Verbraucher und kleine Bitcoin-Investoren anzubieten. Langfristig würde die Integration von Bitcoin in Hunderttausende Bank-Geldautomaten weltweit die Akzeptanz von Bitcoins weiter erhöhen.

Quelle. Chuck Reynolds

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