PBS поддерживает шифрование на стороне клиента с помощью AES-256 в режиме GCM.

Cначала следует создать ключ шифрования:

$ proxmox-backup-client key create my-backup.key
Encryption Key Password: ******
Verify Password: ******

Создание зашифрованной резервной копии:

$ proxmox-backup-client backup user_s.pxar:/home/user/ --repository pbs.test.alt:store1 --keyfile ./my-backup.key
Password for "root@pam": ***
Starting backup: host/host-197/2023-09-17T12:17:16Z
Client name: host-01
Starting backup protocol: Sun Sep 17 14:17:19 2023
Using encryption key from './my-backup.key'..
Encryption Key Password: ******
Encryption key fingerprint: 0d:aa:4f:9b:ef:63:31:47
fingerprint: cf:24:11:66:bd:84:ca:7b:52:7c:5c:66:72:7b:c1:4e:4a:b7:ca:10:07:d5:c7:ca:fc:6b:f9:e8:49:89:43:e9
Are you sure you want to continue connecting? (y/n): y
Downloading previous manifest (Sun Sep 17 14:14:27 2023)
Upload directory '/home/user/' to '192.168.0.123:store1' as user_s.pxar.didx
user_s.pxar: had to backup 667.04 MiB of 667.04 MiB (compressed 190.028 MiB) in 21.16s
user_s.pxar: average backup speed: 31.518 MiB/s
Uploaded backup catalog (109.971 KiB)
Duration: 31.17s
End Time: Sun Sep 17 14:17:31 2023

Содержимое хранилища store1: