So What is Blockchain ?
A blockchain is a distributed database that preserves the growing list of the transaction records, called blocks. The chain of blocks is linked using cryptography. “This database is shared across a network of computers so-called distributed ledger network. Each data block links to the previous block in the blockchain through a cryptographic hash of the previous block, a timestamp, and transaction data.”
Since blockchain is a distributed, decentralised, and a public digital ledger, the data are secure, can not be manipulated or hacked.
How Does Blockchain Works?: Video
History Of Blockchain
Gartner: Blockchain Spectrum
Paradigm Shift: Blockchain technology for Passports and Visas
According to the World Tourism Organization 2018 report, the total number of arrivals worldwide international tourist reached 1.4 billion. That also marked seven straight (+4%) growth in tourism exports surpassed the (+3%) growth in merchandise exports. Based on the significant increase in international arrivals, predicted that by 2030 it would increase up to 1.8 billion.
Also another way to realize what is blockchain.
Blockchain Smart Contract
A new project Know traveler digital identity , or KTDI. Is a project initiated by world economic forum, the goal of the project is to bring together a global group of individuals, governments, authorities and the travel industry to develop more security in world travel. This collaboration enables secure and seamless travel. This inturn benefit the tourism and travel industries. The first KTDI project started between the countries Netherlands and Canada.
“KTDI is based on the blockchain — specifically, Linux’s Hyperledger Indy, a distributed ledger purpose-built for decentralized identity. This is the secret sauce behind the paradigm shift toward a system where travelers — not government agencies or travel brands — control access to their personal data.” Suzanne Rowan Kelleher
Futhermore, several other countries are already exploring the benefit of digital passport and digital visa. It is possible in the near future, this technologic revolution might scrap the physical passport and transform the whole immgration system.