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4

Where is the Ubuntu limit set, It is a filesystem limit. All "ext" have a 255 chars limit. Here is a list of a lot of filesystems. ReiserFS shows 4032 bytes (but it is limited to 255 chars because of Linux VFS). The 144 char limit for encypted file is incorrect. It is 143 (from the creator of ecryptfs utilities). The remaining chars are needed for the ...


3

Just overwriting the LUKS header will work, overwriting the whole drive is way overkill for LUKS & would take possibly hours longer. The LUKS header could be 1MB or 2MB or bigger depending on the type & number of keys, ArchWiki advises to wipe/overwrite the first 10MB: dd if=/dev/urandom of=/dev/sdx2 bs=512 count=20480 Note the correct partition ...


3

Currently AES256 takes too long to brute force. From the link: If you assume: Every person on the planet owns 10 computers. There are 7 billion people on the planet. Each of these computers can test 1 billion key combinations per second. On average, you can crack the key after testing 50% of the possibilities. Then the earth's population can ...


2

An OpenPGP signature includes a reference to the key used for signing. GnuPG will use this exact key to verify the signature. An example for some document signed by my own key, analyzed using gpg --list-packets: :compressed packet: algo=1 :onepass_sig packet: keyid 8E78E44DFB1B55E9 version 3, sigclass 0x00, digest 2, pubkey 1, last=1 :literal data ...


1

The algorithm is used by the US government to encrypt their top secret documents and it is called calculation save. But nothing is impossible. If you have a really fast computer and a lot of time (probably a few hundred or thousand years), you can crack any password. So, to answer your question: Yes, there is a way to decrypt your file without knowing the ...


1

Here is the full account. I have grouped the steps into phases between reboots: Preliminaries Back up your data Reboot to live-USB for main tasks a. pre-installation: make space on disk b. installation: do manual partitioning c. post-installation: supplement initramfs Reboot to primary Ubuntu to update grub Reboot to secondary Ubuntu to add keyfile Reboot ...


1

I encountered this same problem today. Garbled console text in initramfs for dm-crypt luks encryption prompt. I am using Arch Linux, but the symptoms are the same as you're describing. I have full disk luks encryption enabled on my Thinkpad laptop. The prompts from dm-crypt in initramfs (and it would seem all console text from initramfs) are garbled, ...


1

eCryptFS is not designed for cloud storage. It assumes it is the only application accessing your ciphertexts and runs into undefined behavior when some other application (say your Dropbox client) modifies them. EncFS also has its problems as explained here. You might want to take a look at CryFS https://www.cryfs.org


1

If installing Ubuntu in UEFI boot mode to a second drive, either internal or external as full install, you need to have drive seen as sda gpt partitioned with an ESP - efi system partition, FAT32 formatted with boot flag, 100 to 500MB. You also want an ESP on the drive you install Ubuntu, but it may not be used, during install. Best to copy ESP boot files ...


1

OK I found how to do it! WARNING: Doing this will hide the GUI input for the passphrase at the startup splash screen and also the messages "please enter passphrase...", etc. sudo nano /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.script go around line 614 find this lines and comment them Plymouth.SetDisplayPasswordFunction (display_password_callback); ...



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