https://padlet.com/frank_berger/ia60lhddr30j Diverse Quellen en-us 2017-12-08 06:46:10 UTC 2017-12-08 19:45:10 UTC hello@padlet.com frank_berger https://padlet.com/frank_berger/ia60lhddr30j/wish/214392631 A blockchain is essentially a distributed database of records or public ledger of all transactions or digital events that have been executed and shared among participating parties. Each transaction in the public ledger is verified by consensus of a majority of the participants in the system. And, once entered, information can never be erased. The blockchain contains a certain and verifiable record of every single transaction ever made. To use a basic analogy, it is easy to steal a cookie from a cookie jar, kept in a secluded place than stealing the cookie from a cookie jar kept in a market place, being observed by thousands of people.

The main hypothesis is that the blockchain establishes a system of creating a distributed consensus in the digital online world. This allows participating entities to know for certain that a digital event happened by creating an irrefutable record in a public ledger. It opens the door for developing a democratic open and scalable digital economy from a centralized one. There are tremendous opportunities in this disruptive technology and revolution in this space has just begun.

Current digital economy is based on the reliance on a certain trusted authority. Our all online transactions rely on trusting someone to tell us the truth—it can be an email service provider telling us that our email has been delivered; it can be a certification authority telling us that a certain digital certificate is trustworthy; or it can be a social network such as Facebook telling us that our posts regarding our life events have been shared only with our friends or it can be a bank telling us that our money has been delivered reliably to our dear ones in a remote country. The fact is that we live our life precariously in the digital world by relying on a third entity for the security and privacy of our digital assets. The fact remains that these third party sources can be hacked, manipulated or compromised.
This is where the blockchain technology comes handy. It has the potential to revolutionize the digital world by enabling a distributed consensus where each and everly online transaction, past and present, involving digital assets can be verified at any time in the future. It does this without compromising the privacy of the digital assets and parties involved. The distributed consensus and anonymity are two important characteristics of blockchain technology.

One key emerging use case of blockchain technology involves “smart contracts”. Smart contracts are basically computer programs that can automatically execute the terms of a contract. When a pre-configured condition in a smart contract among participating entities is met, then the parties involved in a contractual agreement can be automatically made payments as per the contract in a transparent manner.

Smart Property is another related concept which is regarding controlling the ownership of a property or asset via blockchain using Smart Contracts. The property can be physical such as car, house, smartphone etc. or it can be non-physical such as shares of a company. 

Quelle: http://scet.berkeley.edu/wp-content/uploads/BlockchainPaper.pdf]]> 2017-12-08 06:50:17 UTC https://padlet.com/frank_berger/ia60lhddr30j/wish/214392631 frank_berger https://padlet.com/frank_berger/ia60lhddr30j/wish/214392756 Die Blockchain ist eine dezentrale Datenbank, mit deren Hilfe digitale Gutscheine (Token) nachvollziehbar und fälschungssicher verschoben werden. Die Transaktionsdaten werden in Blöcken aneinandergereiht (deshalb Blockchain), dezentral abgelegt, sind für alle Involvierten einsehbar und daher fälschungssicher. Der Token verkörpert nicht immer eine Währung, sondern kann auch einen Vermögenswert, einen Kredit oder einen zukünftigen Gewinnanteil dokumentieren.
Quelle: NZZ  11.10.2017]]> 2017-12-08 06:51:36 UTC https://padlet.com/frank_berger/ia60lhddr30j/wish/214392756 frank_berger https://padlet.com/frank_berger/ia60lhddr30j/wish/214393017 Herzstück eines internetbasierten Zahlungssystems ist eine dezentrale Datenbank, die die Geldflüsse dokumentiert. Damit diese Buchhaltung nicht gefälscht werden kann, damit es nicht möglich ist, ein digitales Geldstück mehrfach auszugeben, werden die einzelnen Datensätze mithilfe von kryptologischen Verfahren so miteinander verknüpft, dass es nicht möglich ist, im Nachhinein einzelne Transaktionen unabhängig vom Ganzen abzuändern. Bei Bitcoin wird die Buchhaltung Blockchain genannt.
Quelle: NZZ  13.10.2017]]> 2017-12-08 06:54:23 UTC https://padlet.com/frank_berger/ia60lhddr30j/wish/214393017 frank_berger https://padlet.com/frank_berger/ia60lhddr30j/wish/214393106 Die Druckerpresse hat damals das Problem der Wissensverbreitung gelöst. Der Blockchain sagt man nach, dass sie das Problem des Vertrauens lösen wird.
Quelle: Unbekannt]]> 2017-12-08 06:55:31 UTC https://padlet.com/frank_berger/ia60lhddr30j/wish/214393106