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common-tasks/backup-restore.md
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@ -13,11 +13,6 @@ Qubes Backup, Restoration, and Migration
**Caution:** The Qubes backup system currently relies on a [weak key derivation scheme](https://github.com/QubesOS/qubes-issues/issues/971). It is *strongly recommended* that users select a *high-entropy* passphrase for use with Qubes backups. **Caution:** The Qubes backup system currently relies on a [weak key derivation scheme](https://github.com/QubesOS/qubes-issues/issues/971). It is *strongly recommended* that users select a *high-entropy* passphrase for use with Qubes backups.
* [Creating a Backup](#creating-a-backup)
* [Restoring from a Backup](#restoring-from-a-backup)
* [Emergency Backup Recovery without Qubes](#emergency-backup-recovery-without-qubes)
* [Migrating Between Two Physical Machines](#migrating-between-two-physical-machines)
* [Notes](#notes)
With Qubes, it's easy to back up and restore your whole system, as well as to migrate between two physical machines. With Qubes, it's easy to back up and restore your whole system, as well as to migrate between two physical machines.
@ -98,6 +93,6 @@ In order to migrate your Qubes system from one physical machine to another, simp
Notes Notes
----- -----
* The Qubes backup system relies on `openssl enc`, which is known to use a very weak key derivation scheme. The Qubes backup system also uses the same passphrase for authentication and for encryption, which is problematic from a security perspective. Users are advised to use a very high entropy passphrase for Qubes backups. For a full discussion, see [this thread](https://groups.google.com/d/msg/qubes-devel/CZ7WRwLXcnk/u_rZPoVxL5IJ). * The Qubes backup system relies on `openssl enc`, which is known to use a very weak key derivation scheme. The Qubes backup system also uses the same passphrase for authentication and for encryption, which is problematic from a security perspective. Users are advised to use a very high entropy passphrase for Qubes backups. For a full discussion, see [this ticket](https://github.com/QubesOS/qubes-issues/issues/971) and [this thread](https://groups.google.com/d/msg/qubes-devel/CZ7WRwLXcnk/u_rZPoVxL5IJ).
* For the technical details of the backup system, please refer to [this thread](https://groups.google.com/d/topic/qubes-devel/TQr_QcXIVww/discussion). * For the technical details of the backup system, please refer to [this thread](https://groups.google.com/d/topic/qubes-devel/TQr_QcXIVww/discussion).
* If working with symlinks, note the issues described in [this thread](https://groups.google.com/d/topic/qubes-users/EITd1kBHD30/discussion). * If working with symlinks, note the issues described in [this thread](https://groups.google.com/d/topic/qubes-users/EITd1kBHD30/discussion).