A shared ledger is a database or record that is accessible to multiple participants. In this system, all participants can view, add to, or modify the entries, ensuring transparency and trust among users. In the context of digital currencies, a shared ledger is typically decentralized, meaning no single entity has control over it. Instead, copies of the ledger exist on numerous computers around the globe, facilitating consensus and preventing fraud. This decentralization enhances security, as tampering with one copy would require altering all others simultaneously.The most well-known example of a shared ledger is blockchain technology. It records transactions in blocks, which are linked together in chronological order. Each transaction is validated by network participants, ensuring that all entries are accurate and reliable.Overall, a shared ledger fosters collaboration and enhances security, making it a fundamental component of many digital currency systems.