Double spending protection refers to mechanisms that prevent the same digital currency unit from being spent more than once. This issue arises because digital items can be easily copied, making it crucial to ensure that each transaction is unique and valid.Blockchain technology plays a key role in addressing this problem. Each transaction is recorded on a public ledger, where all network participants can verify and validate transactions. Once confirmed, a transaction becomes part of a block that is linked to previous blocks, creating an irreversible chain of data. Consensus algorithms, such as proof of work or proof of stake, help secure the network by requiring participants to agree on the validity of transactions. This reduces the chances of tampering or fraudulent activities, ensuring that once a transaction is confirmed, the same funds cannot be used again.In summary, double spending protection is essential for maintaining trust and security in digital currency systems, allowing users to transact with confidence that their funds cannot be duplicated or misused.