Blockchains are distributed ledgers, so every computer on the network uses the same algorithm to check the validity of transactions, and every computer stores a copy of the ledger. This makes it impossible for anybody to tamper with records once they have been recorded and appended to the chain. Encryption and consensus algorithms are used to verify transactions, while new blocks contain details of transactions that have occurred during that period. Blockchains can record financial transactions and any other kind of digital value transfer.

Encryption and consensus algorithms are used to verify transactions.

In a nutshell, you can think of the blockchain as a database where each entry or “block” is secured with cryptography. Each block contains information about the previous block, so the chain is built upon itself in an unbroken line. Encryption and consensus algorithms are used to verify transactions and make sure they’re legitimate. That’s also the ability on crypto platforms such as that have a username and password for secure transactions.

Encryption is a technique used to protect data by transforming it into something that cannot be read or understood without special knowledge. A well-known example of encryption is when you send someone an email. Your message goes through several computers on its way to its destination; if anyone wants to access your message without your permission or someone else who originally sent it.

They would have trouble doing so because messages are encrypted using public key cryptography. Cryptographic hashes are another example of encryption. These take any inputted data and return another set of numbers based on those inputs. So if someone changes one number in their codebase, all subsequent hashes will be different too.

New blocks contain the details of transactions.

Blocks contain the details of transactions. A block is a record of transactions that have occurred since they created the last block, and these records are linked together to form a chain. You can add new blocks to the chain by solving a complex mathematical problem. The process of adding new blocks to the chain is called mining, and it involves solving an extremely difficult puzzle with maths so advanced that it’s nearly impossible for humans alone.

Users can verify transactions because there is an agreed-upon set of rules (or protocol) that govern how each record should look and be structured. Everyone follows them when adding new entries into their copy of the ledger. The rules also ensure that no one can tamper with existing data without being detected by others. This makes it possible for other users to trust that all entries are accurate without having direct oversight over who adds what information or when it gets added.

Every computer stores a copy of the ledger.

To understand how blockchain works, you must first understand its basics. Blockchains have a distributed ledger. This means that every computer in the network stores a copy of the ledger. This is important for security and scalability because if someone tries to cheat on this system, they would need to hack all computers on the network at once. And since thousands or millions of computers are in most networks today, that task becomes almost impossible. 

Every block contains a cryptographic hash of all blocks previously appended to the chain, thus providing an unbroken link. This way, if someone tries to change something in one block, it would also change the hash value of every other block that follows it.

Blockchain is also highly scalable because every new block has to be verified by several nodes before it’s added to the system. Each node stores a copy of all previous transactions on its local hard drive. This means that there are no bottlenecks or bottlenecks where data has to be processed in one place only, which results in high-performance levels during peak hours when many users are accessing their data simultaneously. This unbroken link makes it impossible to tamper with records once they have been recorded and appended to the chain.


We’ve seen that blockchains are a type of decentralised database and can be used for any application where you need records to be immutable, decentralised, and tamper-proof. The most common use cases are financial transactions, which have also been used in voting systems and supply chain management.

By admin

%d bloggers like this: