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I installed Ubuntu 14 LTS with disk encryption (selected during installation). I have two questions:

1- What is encryption algorithm of current encrypted disk?

2- I have a second hard disk and I want to encrypt it with same algorithm and same password, so that after boot Ubuntu can mount it automatically. How can I do that?

Mustafa Chelik
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2 Answers2

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You should have the tool cryptsetup already installed.

To show details of the current cipher you can run the following command:

sudo cryptsetup status sda5_crypt

Replacing sda5_crypt with the name of your encrypted volume. You should see an output similar to this:

  type:    LUKS1
  cipher:  aes-xts-plain64
  keysize: 512 bits
  device:  /dev/sda5
  offset:  4096 sectors
  size:    482697216 sectors
  mode:    read/write
  flags:   discards
NGRhodes
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Yesterday I wrote an answer in Initramfs + Luks - only one password prompt that answers your second question, too: There is a script included with luks that you can use to derive a key for device B from an opened device A. Hence you only have to type the password for your root device and the keys for all other devices will be calculated from that. (But: The devices won't have the same passwords, unless you add the same password to each one manually.)

Community
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luckyrumo
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