What is the purpose of integrating eCryptfs with PAM?

To automatically mount the encrypted home directory at login and unmount it at logout.

To encrypt the user's password before storing it in /etc/shadow.

To allow multiple users to share the same encrypted directory.

To provide a graphical interface for managing encryption keys.

A LUKS-encrypted volume is currently open and mapped to /dev/mapper/secure. The administrator needs to close the volume and ensure the mapping is removed. Which command should be used?

cryptsetup luksClose /dev/mapper/secure

A LUKS-encrypted volume was created with a single passphrase. The administrator wants to change the passphrase to a new one and ensure that the old passphrase no longer works. Which command sequence should be used?

cryptsetup luksAddKey /dev/sde && cryptsetup luksRemoveKey /dev/sde

cryptsetup luksChangeKey /dev/sde --key-slot 0

cryptsetup luksRemoveKey /dev/sde

What is the role of dm-crypt in Linux disk encryption?

It is a user-space tool used to create and manage encrypted file systems.

It is a file system that stores encrypted files on top of an existing file system.

It is a protocol for exchanging encryption keys between systems.

It is a kernel-level framework that provides transparent encryption of block devices using the device mapper.

A developer wants to encrypt a directory containing source code on a shared development server. The developer does not have root access and cannot load kernel modules. The directory must be encrypted so that other users on the system cannot read the files. Which encryption method is most appropriate in this environment?

Plain dm-crypt on the directory

LPIC-3 Security

Domain 1Objective 3

325.3 Encrypted File Systems (weight: 3) LPIC-3-SECURITY Practice Questions (Page 2)

Part of the Topic 325: Cryptography domain, which makes up ~28% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~10–17 in this domain), expect 3–4 from this objective — we provide 28 practice questions to prepare you well beyond it. (estimate)

28questions here

6free pages

6concepts

Questions 6–10

6foundation · easy
What is the purpose of integrating eCryptfs with PAM?
Select an answer first
7application · medium
A LUKS-encrypted volume is currently open and mapped to /dev/mapper/secure. The administrator needs to close the volume and ensure the mapping is removed. Which command should be used?
Select an answer first
8expert · hard
A LUKS-encrypted volume was created with a single passphrase. The administrator wants to change the passphrase to a new one and ensure that the old passphrase no longer works. Which command sequence should be used?
Select an answer first
9foundation · easy
What is the role of dm-crypt in Linux disk encryption?
Select an answer first
10application · medium
A developer wants to encrypt a directory containing source code on a shared development server. The developer does not have root access and cannot load kernel modules. The directory must be encrypted so that other users on the system cannot read the files. Which encryption method is most appropriate in this environment?
Select an answer first

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