What is define duplicity?

Duplicity is a backup software program that provides encrypted and incremental backups of files and directories to various types of remote storage, such as local drives, networked file servers, and cloud-based services like Amazon S3 or Google Drive. Duplicity uses GnuPG encryption and allows users to encrypt and sign their backup data to ensure its security before uploading to the remote storage. Duplicity also supports full and partial restores of data, and can manage retention policies to automatically remove older backups. Overall, duplicity is ideal for users who need to store their backup data securely and efficiently, while ensuring its reliability and ease of use.