Understanding Bitcoin

 Bitcoin is a collection of computers, or nodes, that all run Bitcoin's code and store its blockchain. A blockchain can be thought of as a collection of blocks. In each block is a collection of transactions. Because all these computers running the blockchain have the same list of blocks and transactions and can transparently see these new blocks being filled with new Bitcoin transactions, no one can cheat the system. Anyone, whether they run a Bitcoin "node" or not, can see these transactions occurring live. In order to achieve a nefarious act, a bad actor would need to operate 51% of the computing power that makes up Bitcoin. Bitcoin has around 47,000 nodes as of May 2020 and this number is growing, making such an attack quite unlikely.4



In the event that an attack was to happen, the Bitcoin nodes, or the people who take part in the Bitcoin network with their computer, would likely fork to a new blockchain making the effort the bad actor put forth to achieve the attack a waste.

Bitcoin is a type of cryptocurrency. Balances of Bitcoin tokens are kept using public and private "keys," which are long strings of numbers and letters linked through the mathematical encryption algorithm that was used to create them. The public key (comparable to a bank account number) serves as the address which is published to the world and to which others may send bitcoins. The private key (comparable to an ATM PIN) is meant to be a guarded secret and only used to authorize Bitcoin transmissions. Bitcoin keys should not be confused with a Bitcoin wallet, which is a physical or digital device that facilitates the trading of Bitcoin and allows users to track ownership of coins. The term "wallet" is a bit misleading, as Bitcoin's decentralized nature means that it is never stored "in" a wallet, but rather decentrally on a blockchain.

Comments

Post a Comment

Popular posts from this blog

Limited Concurrent Transactions

  The Bitcoin block system requires connection and confirmation from the peer-to-peer network to be verified. Because each block contains a limited record of transactions and an upper limit to the number of new transactions that can be written, there’s a limit to how many people can buy and sell with the system at any given time. As more and more vendors and individuals use Bitcoin to do business, the number of transactions per second increases, and the peer-to-peer network is becoming congested, with some operations without transaction fees taking hours to clear. Whereas conventional payment systems like credit cards can simply expand their connections and processing power to speed up processing, the isolated peer-to-peer nature of bitcoin doesn’t allow it to scale with the global financial system. Black Market Appeal A central principle to the design of the Bitcoin system is that there is no single transactional processing authority. As a result, no single user can be locked out o
Read more

Bitcoin Mining Has Diminishing Returns

  A few years ago when the Bitcoin system was new, individual users “mined” for new Bitcoins at a rapid pace. Bitcoin mining software used local processors, and even extra processors like a computer’s graphics card, to calculate hashes for the next block in the blockchain. While the number of people using and “mining” Bitcoin was low, each user doing the mining would randomly confirm the next block at a higher pace, generating new Bitcoins for his or her account quickly. But this boom in generation couldn’t last. The Bitcoin system is designed to make each new block more difficult to find than the last one, reducing the number of randomized Bitcoins that are generated and distributed. That means that as time goes on, each individual mining for them has to work harder and harder (in a figurative sense—it’s the computer that’s working harder and using more electricity, and thus, costing more conventional money). As the number of individual Bitcoins grows, the amount of Bitcoins rewarde
Read more