Till now most of the people across different verticals know what blockchain is and how it is one of the most innovative technologies that has the potential to disrupt various industries. Blockchains are immutable, and forge-proof making them the best platform for data related transactions. Blockchain also happens to be a platform that prevents a diverse range of frauds including identity theft, financial forgery, data thefts and more. While collecting all the necessary information about Blockchain and its functions, most of us misunderstand the mechanism behind such a tamper-proof nature of this incredible technology. The secret of Blockchain security and tamper proof nature is ‘Cryptography’.
Cryptocurrencies, just like the fiat currency, are needed to be stored and secured. And just like the physical wallets, the cryptocurrencies also are kept in the wallets and generally, referred as Crypto wallets. In Crypto wallets, it is not the real coins that are stored inside, rather digital codes or two types of keys i.e. Private and Public key. Public key is visible to everyone and is used by others to send money. On the contrary, private key is used only by the owner of the wallet to perform send transactions. Losing the Private Key can result in loss of the currencies, since you lose whole control over your wallet and this is the reason it is recommended that at least two different techniques should be used for saving and storing of the private keys.
The world is finally moving to the next level of revolution in IT & Internet. The Blockchain is tout to be ‘the internet 3.0.’ It is based on the distributed ledger technology, though the real potential of this technology was realized only when the Blockchain came into existence. And when, still many people are in the process of understanding use cases of the Blockchain Technology beyond Bitcoin, a new technology is making news, hyped as the ‘future of distributed ledger,’ the Hashgraph.
Where ever there is a mention of Blockchain on the internet, you will always find reference to Smart Contracts too. The word Smart Contract originated in 1997, when Nick Szabo, used it to describe physical objects that change their behavior based on data. Today, in Blockchain, we used this word in a different sense. It is used to describe a computation that happens on the Blockchain which is influenced/triggered by external events/information such as the weather.
Blockchain is a closed network utilized for secure transfer of value. There are public chains which allow anyone to become a part of the network and there are private chains which allow only certain authorized individuals or institutions to become a member. However, there will always be a world outside this network which might need to be contacted. Hence the question, “How Blockchains communicate with outside world?”