:Introduction

Transaction Signature

All the data stored in the ledger must be signed by multiple parties to ensure that the data is non-repudiation and tamper-proof.

• Signature of the ledger: The Ledger user signs the data that needs to be stored in the ledger and endorses the accounting data.
• Signature of the ledger that is provided by the account book provider: After the account book provider has written the data into the account book, the account book provider will provide a signed receipt to the account book user to endorse the data.
• Signed by a third-party trusted time provider: a third-party trusted time provider, such as the China National Time Service Center and the Greenwich Mean Time Service Center, can provide a trusted timestamp for the data stored in the ledger and endorse the timestamp for the data.

Data clue

Users can customize leads to trace the ledger data.

• Data clue tracing: Provides a custom clue operation, which allows users to connect the stateless Ledger data in series to trace the data.

• Quick search for data clue: you can quickly search for the ledger data related to this clue.

• Quick verification of data clue: quickly verify Ledger data based on specific clues.

Ledger member

The LedgerDB allows multiple users to use the same ledger simultaneously to achieve multi-party collaboration. The owner of the ledger becomes the Ledger administrator, who can assign and manage the members and their permissions.

Time Ledger

The Time Ledger is a ledger maintained by the LedgerDB service that is common and viewable to all LedgerDB users. It records anchor points and third-party trusted timestamps (Time Stamp Authority).

• A time anchor is a record in the Time Ledger. LedgerDB performs hashing on the data on all Ledger instances it maintains at a certain interval to form a unique hash value, and records this value in the Time Ledger, which is called a time anchor. Each user can witness each other's time anchors through the Time Ledger, enhancing the credibility of the ledger data.
• The third-party trusted timestamp (TSA) is a timestamp service provided by a third-party time service with authoritative endorsement. The LedgerDB service performs hashing on the data in the Time Ledger from time to time to form a unique hash value. The hash value is used to request the TSA service and the returned results are stored in the time book.