Amazon Quantum Ledger Database (QLDB) is a fully managed ledger database service that provides a transparent, immutable, and cryptographically verifiable record of transactions. It allows you to create a history of changes to your data, and to verify the integrity and authenticity of the data without the need for a central trusted authority.
QLDB is designed to be a ledger, rather than a traditional database, which means that it is focused on maintaining an accurate record of transactions, rather than supporting complex queries or data manipulation. It stores all data changes as a sequence of transactions, and maintains a complete and verifiable history of those transactions.
One of the main benefits of QLDB is its ability to provide a transparent and immutable record of transactions. This means that you can trust the data in the ledger, because it cannot be modified or deleted by any user, including the database administrator. QLDB uses cryptographic hashing and digital signatures to ensure the integrity and authenticity of the data, and to provide a verifiable record of all changes.
QLDB is well-suited for a variety of applications that require a transparent and verifiable record of transactions, such as supply chain management, financial auditing, and regulatory compliance. It can help organizations to build trust and confidence in the data they use, and to demonstrate the integrity and authenticity of their transactions to regulators and other stakeholders.