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To verify whether your encrypted volume uses PBKDF2 or Argon2id, execute the following command.
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3
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Replace <span class="command-placeholder">[partition]</span> with the
partition name found in step 1.6.
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4
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<p class="pre command-template">cryptsetup luksDump /dev/<span class="command-placeholder">[partition]</span></p>
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5
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In the output:
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6
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`Version` indicates the version of LUKS, either `1` or `2`.
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7
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`PBKDF` indicates the key derivation function, either `pbkdf2` or `argon2id`.
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8
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If your encrypted volume already uses LUKS2 and Argon2id, you can stop
here.
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9
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Execute the following command to do a backup of your LUKS1 header.
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<p class="pre command-template">cryptsetup luksHeaderBackup /dev/<span class="command-placeholder">[partition]</span> --header-backup-file /home/amnesia/luks1header</p>
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If something goes wrong, you will be able to restore your LUKS1 header
from this backup with:
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<p class="pre command-template">cryptsetup luksHeaderRestore /dev/<span class="command-placeholder">[partition]</span> --header-backup-file /home/amnesia/luks1header</p>
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13
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To update your LUKS header to LUKS2, execute the following command.
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14
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Replace <span class="command-placeholder">[partition]</span> with the
device name found in step 1.6.
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15
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<p class="pre command-template">cryptsetup convert /dev/<span class="command-placeholder">[partition]</span> --type luks2</p>
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To verify that Argon2id is the new key derivation function, execute the following command again.
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17
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In the output, verify that:
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The `Version` is `2` and not `1`.
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19
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The `PBKDF` is `argon2id` and not `pbkdf2`.
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20
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Try to unlock your encrypted volume.
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