Which tool is used to backup the root encryption keys in SAP HANA?

The tool specifically designed for managing and backing up the root encryption keys in SAP HANA is indeed hdbnsutil. This utility is crucial for tasks related to security, especially when it comes to key management. When you perform operations involving the root key, such as transferring or backing up the encryption keys, hdbnsutil facilitates these processes effectively.

hdbnsutil also provides options for setting up key backup, restoring keys, and configuring encryption settings, which are vital for ensuring data security and integrity. Managing encryption keys is important in securing the data stored in the HANA database, and using the proper tool for this task ensures compliance with security protocols and enables the recovery of data in case of key loss.

The other tools mentioned serve different purposes. For example, hdbsql is a command-line tool for executing SQL statements, while hdbbackup is related to performing data backups of the entire database. hdbuserstore is used for managing user credentials but does not pertain to key management. Thus, hdbnsutil stands out as the correct choice for backing up root encryption keys.