Questions tagged [disk-encryption]

Disk encryption is a special case of data at rest protection when the storage media is a sector-addressable device (e.g., a hard disk).

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How to set up full disk file encryption?

I want to set up my company's laptops in a way that all files created on these laptops can only be read by these laptops. If it is copied to a USB then that file is only readable when plugging that ...
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Is it secure to set the encryption password the same as the root password? [duplicate]

When installing Manjaro Linux, it shows the following screen: What's the logic behind that?
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Possible to restore LUKS header from partition that uses the exact same password and keyfile?

I was in Windows 10 and it told me I needed to Initialize Disk so I clicked it and now my LUKS header has been overwritten. I created my encrypted partitions in Linux with cryptsetup command. However, ...
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How can I know if a USB drive is fully encrypted?

When a fully encryped USB drive is connected to a computer, the OS says this USB drive is not formatted. How can I verify that a USB drive is fully encrypted while still being formatted? Is there a ...
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BIOS/UEFI update and BitLocker suspension [migrated]

I can read on many pages that when you update your BIOS/UEFI, you need to suspend BitLocker (for information, mine is configured to ask for a password at startup, no TPM in my machine). But none of ...
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How challenge response password recovery mechanism works with disk encryption?

For the sole purpose of learning, I am trying to figure out how disk encryption software is able to recover password of an encrypted disk using a challenge response mechanism. Th recovery process ...
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Should operating system passwords be complex if full disk encryption is used that has a complex passphrase?

If a device uses full disk encryption such as LUKS, BitLocker (with a pin), Veracrypt and others and boots using a complex password, what is the need for complex passwords to log into the operating ...
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Is Android encryption secure? [duplicate]

As far as I know Android (Pie) is encrypted by default with some hardware-based password. But how secure is this encryption? I am not talking about password compromise, but if somebody gets my phone,...
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165 views

Is an encrypted hard drive immune from malware if it is not mounted when using a LiveCD?

As a follow-up to the question in The DMZ, is an encrypted drive (full disk encrypted e.g. LUKS, BitLocker) protected against malware if it is not mounted when using a LiveCD? The use case is that ...
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1answer
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Strategies to protect SANs in branch offices in risky places

A company has several remote branch offices located in relatively dangerous places, such as Iraq, and I'm looking into strategies to secure the SAN in the event of theft or looting. The data is ...
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Have I used LUKS properly?

I am about to go travelling to some high risk countries where corrupt officials will most likely try to go through my laptop and external HDD. I am using Linux Mint and LUKS. Could someone please ...
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Disk encryption with automatic reboot and no-network [duplicate]

I am using crytsetup with LUKS to encrypt a data drive, separate to the system drive, under Ubuntu 16.04. The issue I am facing is that this system will also be required to automatically start itself ...
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Hashed password vs key, full-disk encryption

In the case of FDE, I understand that the user defined password is ran through a hashing algorithm such as SHA-512 (often with a random SALT and a high iteration count to act as a countermeasure for ...
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Implementing encryption at rest on a remote virtual file system

Imagine I had a virtual file system that I am using to store some data (similar to an FTP). I am trying to figure out a scheme where I can implement encryption at rest for the files local to the file ...
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1answer
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What makes drive encryption safe?

Let's build a scene: I'm working on my laptop in the library, and while I'm gone to the toilet for 5 minutes, someone disassembled my laptop and took the hard drive. I encrypted it with VeraCrypt, so ...
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1answer
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SSD Hardware Encryption versus Software Encryption

I was looking to purchase a new SSD and want to use it to store sensitive data, that I would not want people to steal or access. Have been trying to research it and only read bad things about ...
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How do crypto coprocessors securely decrypt a disk without allowing bus sniffing?

I'm trying to understand how using a crypto co-processor chip can securely decrypt a disk without someone getting the decryption key by sniffing the bus it communicates on or loading the disk onto ...
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1answer
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I got my drive “bitlocker encrypted” by enterprise admins. Will this prevent me to share docs with my collaborators?

I admit I don't fully understand the level of encryption bitlocker does. I use Windows 10 and only have a C: drive which just got encrypted per the company policies. Will this hinder my ability to ...
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How to use FDE without needing to share the encryption password

We have an AI model which needs to be deployed on premise. The hardware will be provided by us, so we can do what ever we want on the device. The device is a mini PC running Ubuntu 18.04. The UI is ...
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1answer
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Effect of FDE for data recovery

Assume that I fully encrypt an unused USB (FDE), then format it and copy plaintext files. If the files are deleted from USB by using a secure wipe, does FDE that was first applied decrease the ...
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Encrypted Container for Azure WebApps

I am considering moving an application - which currently sits on a Bitlocker-encrypted Windows Server - to a Microsoft Azure WebApps Linux Container. As far as I understand, encryption of the ...
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1answer
56 views

RAID + IEEE1667 + TPM + UEFI

Windows Server using a IEEE-1667 drive allows hardware based encryption on the fly. What are our options when using two disks with a RAID controller, in order to achieve redundancy and parity (T10-...
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Self encrypting drive without ATA password

Kind of new to this area so correct me if I am wrong. Based on my reading self encrypting drive will encrypt and decrypt all data in your disk and this process is totally transparent to the user. ...
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How long shall a password be to resist a botnet brute force? [duplicate]

Imagine that I'm an evil genius, and I had the brilliant idea of creating a botnet for brute forcing passwords. Or I'm just the owner of the Echelon, and I have a farm of distributed servers around ...
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Security risk of copying

I need to back up an encrypted drive, if the data gets corrupted I'd have another copy I don't have another drive that I trust not to have been compromised right now. My idea is to copy an encrypted ...
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0answers
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Employ fscrypt to securely protect, from data-at-rest exposure, all files+data installed after an initial Linux system build?

Our team's goal We want to protect our sensitive data from being potentially data-at-rest exposed after we relinquish a Linux VPS (see below) provided by a hosting service. We're exploring simple(r) ...
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Does File-Based Encryption offer comparable security to Full-Disk Encryption on Android?

Between version 4.4 and 9, Android supported Full-Disk Encryption (FDE). On Android 7, a new system called File-Based Encryption (FBE) was introduced, and was subsequently made mandatory on Android 10....
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How to prevent a hosting company from accessing a VM's encryption keys?

I want to prevent potential theft of my web application (source code + database) by my local hosting company, that I don't fully trust for some reason (but have no other choice but to use as they give,...
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170 views

What's a good encryption method available for external hdd's, ext4? [closed]

I've been reading about encryption methods and see things like 'ecryptfs', 'veracrypt', 'LUKS' that "military grade encryption" is basically 256-AES encryption. I have data on an external hdd - can'...
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Bitlocker/Filevault and VeraCrypt together?

I'm researching ways to make the most secure encryption for additional fixed drives to protect against unknown vulnerabilities, side channel attacks, etc. Basically, securing the data beyond just a ...
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How sufficient are these steps to prevent deleted SSD files from being recovered?

I'm selling a 4-year-old Dell PC with Windows 10 and two SSDs and I want to be sure that nobody can recover anything from my personal deleted files. So far I've done the following. Completely ...
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Non-obvious Mitigations for This DMA-Attack Demonstrated by F-Secure

Are there any non-obvious mitigations for the big DMA-attack revealed last year and demonstrated in this video by F-Secure? We know that Microsoft has published some material pertaining to DMA-...
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Rotating Tang Keys - change Clevis bind without passphrase

Using standard RedHat documentation... https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Security_Guide/sec-Using_Network-Bound_Disk_Encryption.html Created enrypted ...
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Are there any risks from cloning a LUKS encrypted partition?

I'm using an installation of Ubuntu server on disk, with some extra packages installed and configuration carried out, on disk as a kind of base image for repeatedly creating other systems. I clone ...
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1answer
566 views

How does Windows use the TPM for BitLocker encryption without an attacker being able to do the same?

How does Windows use the TPM for BitLocker encryption without an attacker being able to do the same? From this FAQ, I understand that BitLocker uses the following keys to encrypt the hard-drive: ...
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3answers
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Should I upgrade old volumes to new cryptsetup encryption mode?

The old cryptsetup default is aes-cbc-essiv:sha256. The new one is aes-xts-plain64:sha256. I don't know that much about cryptography but I assume the standard was changed for a reason. Also there can ...
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Best luks setup disk [duplicate]

I want to encrypt my disk but I want to know what is the best configuration, I currently use ths: cryptsetup -v --cipher serpent-xts-plain64 --key-size 512 --key-file=- --hash whirlpool --iter-time ...
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1answer
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How secure is full-disk encryption technology on LineageOS, or Android phones in general?

We're attempting to assess the information security on our mobile devices, and information seems rather varied on the question of encryption. Is the encryption technology employed by Android-based ...
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Disk Encryption VS SQL TDE Encryption

I am trying to understand what would be the benefit of using SQL TDE on top of underlying disk encryption. My understanding is that disk encryption will prevent malicious users pulling out the disk ...
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LUKS partition encryption vs. .vmdk level encryption

Because of data classification that is stored on one of our servers we need to make sure that it is protected while in transit and at rest. While the first can be addressed with proper TLS ...
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1answer
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Windows BitLocker- Is the drive Password the same as the Key used by AES to encrypt the drive?

I am using BitLocker on my Win10. I encryted my usb drive using my Windows BitLocker with a strong password. I know that Bitlocker uses AES-~256 bit key for encryption. My question what is the key ...
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Protect LUKS encrypted HDD against boot sector key stealing attack

I have HDD with GPT, 1 MiB BIOS boot partition and LUKS encrypted volume group with data. When I boot the computer, GRUB asks for passphrase. However, I want to run some untrusted application which ...
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2answers
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Is it too late to encrypt my already used USB drive?

I've had my USB for quite a while now. It contains quite a lot of personal information on it. (I know, I'm stupid for not encrypting it before hand). Is it too late to encrypt my drive even if files ...
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1answer
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On a mobile, does using a password instead of a PIN make encryption stronger?

On a mobile, does using a password instead of a PIN make encryption stronger? What key does the phone use for its encryption? Would it use the PIN itself?
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2answers
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How is it possible that hardware-encrypted flash devices are safe?

I start with the fact that I understand how flash devices (pendrives) can be encrypted with software, for example Bitlocker. Simply, the encryption key is the password given during encryption and ...
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1answer
192 views

Is suspend-to-ram really a meaningful risk for Full Disk Encryption?

Ubuntu offers full disk encryption relying on luks. An often recurring area of criticism is the fact that Ubuntu disables hibernation by default while suspend-to-ram stores the private keys in the ram ...
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1answer
799 views

Data deleted after encryption - recoverable?

My device (Android 8.0) is encrypted with the default encryption (no startup password). As far as I know, when I have data on my phone and factory-reset the phone, the data is unrecoverable, since a ...
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How is it possible for user's password to be changed after storage was encrypted? (on OS X, Android)

There are built-in functionalities to encrypt a storage on OS X (FileVault) and Android. On OS X: to enable encryption current user must have a password protected account. After enabling the ...
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1answer
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Is there a file system allowing read-only access enforced by cryptography

Is there a file system standard (like LUKS) that allows anyone who can plug in the hard drive to read files, but requires a passphrase to modify or write? For example, I can do something similar by ...
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security of cryptsetup(8) luksRemoveKey, feasibility of extracting MasterSecretKey and using it later

I looked at https://crypto.stackexchange.com/a/24024 and it seems to me cryptsetup(8) luksRemoveKey is weak. The situation: I create new LUKS volume, copy stuff into it. I add a new pass phrase, and ...

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