MySQL Ndb Cluster 8.4 specific security features include :
- Encrypted backups
- Encrypted storage (Checkpoints, redo logs, undo logs + tablespaces) (TDE)
- mTLS on all internal connections for authentication and encryption (Ndb TLS)

All open source, implemented using industry standard optimised and reviewed OpenSSL libraries.

These features are in addition to the standard MySQL Server Security features ([m]TLS, TDE, Binlog encryption, PAM etc)

https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-security.html
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-backup-using-management-client.html
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-tde.html
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-tls.html

https://dev.mysql.com/blog-archive/mysql-cluster-8031-transparent-data-encryption/
https://blogs.oracle.com/mysql/introducing-ndb-tls
https://messagepassing.blogspot.com/2020/11/mysql-cluster-backup-and-restore.html

https://dev.mysql.com/doc/refman/8.4/en/security.html

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