Blockchain

The Genesis Block: The proof of work

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Bitcoin is a global phenomenon that has taken over the globe. Funny Money is no longer a laughing matter. After years in the background the founders and visionaries emerge with a team of stellar innovators to set the record straight about the past and the future. Satoshi Nakamoto the visionary team shows us why there can only be one truth in time which is immutable.Knowing they could trust no one around them, they left their identification mark on the actual code itself to be retrieved as Id when they returned. They stunned the world to show the power of a decentralized system in real time. Like the Voynich code Satoshi Nakamoto and the team around them seek to preserve their legacy in plain view. See if you can find the secrets they leave behind in many forms. Follow the journey from the beginning and see how much went into creating a platform designed with the guidance of nature itself is surpassing modern technology to create an amazing future. Data embedded in the past becomes immutable in the future when retrieved and the keys of decryption display the message left by those who encrypted it. If we claim to be cryptographers and do not have anything encrypted it seems we are not worthy of the name. In the future our generations will look back at those who fought to hold on to the old ways as barbaric. Once we used an outhouse and today we have a modern sanitary system that has cut down many diseases; this is how we view the system we built to clean up the corruption in a system that could not regulate itself. Onward. Buy This Book

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Blockchain from Bitcoin’s perspective

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Blockchain technology is used as basis for a secure and transparent distributed ledger for the Bitcoin cryptocurrency. Its decentralized, public and immutable properties solve the double spending problem and allow every participant of the network to read the transaction history, help in
the validation process and pay and receive Bitcoin.

Cryptographically complex math ensures that everyone can do transactions with everyone without the need for a trusted third party. Next to financial transactions, this also holds for other claims. Entities can put claims on a decentralized ledger by digitally signing it, which allows any other entity to verify that these claims are made by that specific entity.

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Install Hyperledger Fabric on Ubuntu 18.04.1 – Step by Step

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Installation of Hyperledger Fabric on Ubuntu is very straight forward and is a step-by-step process. We can majorly divide this whole process into two major parts: First we need to install all pre-requisites and then we proceed towards installation of Fabric itself.

Installing Prerequisites for Hyperledger Fabric:

  • CURL
  • GO Programming Language with setup of path variable
  • Docker & Docker Compose
  • Node.js Runtime & NPM
  • PYTHON
To install all these prerequisites run following commands in terminal window one by one, everything should go smooth.

sudo apt-get install curl
sudo apt-get install golang-go
export GOPATH=$HOME/go
export PATH=$PATH:$GOPATH/bin
sudo apt-get install nodejs
sudo apt-get install npm
sudo apt-get install python
sudo apt-get install docker
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt-get update
apt-cache policy docker-ce
sudo apt-get install -y docker-ce
sudo apt-get install docker-compose
sudo apt-get upgrade

Till now the environment is ready to install Hyperledger Fabric, Now we will download fabric samples. To do that run following commands in terminal one by one…

sudo curl -sSL https://goo.gl/6wtTN5 | sudo bash -s 1.1.0
sudo chmod 777 -R fabric-samples

Now go into first-network directory which is inside fabric-samples folder and then we will run generate script that will create certificates and keys for the entities on our first blockchain network. This will also create genesis block (first block on blockchain)


cd fabric-samples/first-network
sudo ./byfn.sh generate

Bring your first network up by running following command. byfn stands for “Build Your First Network”

sudo ./byfn.sh up

If everything works fine you should see start screen of fabric network. To bring network down following command is used.
sudo ./byfn.sh down

This entry was posted in Blockchain, Hyperledger Fabric, Ubuntu.

Blockchain in Health Insurance Industry

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Blockchain is reshaping DNAs of almost all businesses, Health Insurance industry is one of them. No doubt insurance industry is already very mature enough but still stakeholders face day to day issues due to lack of connectivity between computerized systems of Insurance Vendors, Hospitals and other Healthcare Services Providers. Read the rest of this entry »

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