Page 3 of 4 FirstFirst 1234 LastLast
Results 21 to 30 of 32

Thread: Best Encryption Software?

  1. #21
    Join Date
    Jan 2008
    Location
    USA
    Beans
    971
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Best Encryption Software?

    Quote Originally Posted by GrantStoner View Post
    I understood that "on-the-fly-encryption" (OFTE) meant data was encrypted first, then written to your system. So basically it's encrypting everything in real time while it's being written to your system, so that nothing is ever temporarily unencrypted. Whereas other methods decrypt your drive when you input the password or key file, and then system is unencrypted until you power-down your computer? Am I wrong?
    If you encrypt your whole disk, everything will either be encrypted or unencrypted at the same time.* That is, after you enter your LUKS password at boot, your system is no longer protected. Likewise when you shut your machine off, the drive is encrypted and the files cannot be retrieved.

    *And before someone objects, it is true that technically, LUKS is encrypting/decrypting on-the-fly while the machine is running, but it's completely transparent to the user since the key is in memory and unlocks/locks everything as needed. I just figured if someone was asking the question OP is that they didn't need to know these details. Unless you are a crypto developer, it's easier to think of it as a binary proposition -- that is, the drive is either encrypted or not. On or off. Technically it's not that simple, but it's good enough of an explanation for the curious end-user, especially considering that there is zero security for the files while the drive is booted. It doesn't matter that most files are technically encrypted until they are accessed -- they can still be easily accessed by anyone behind the keyboard.
    Last edited by rookcifer; June 11th, 2010 at 07:45 AM.

  2. #22
    Join Date
    Jun 2010
    Location
    Sacramento, CA
    Beans
    196
    Distro
    Xubuntu 11.04 Natty Narwhal

    Re: Best Encryption Software?

    Quote Originally Posted by rookcifer View Post
    -- that is, the drive is either encrypted or not. On or off.
    This brings up another question I had. Say, for some reason, I booted and unencrypted my laptop and was using it like normal, but for whatever reason I needed to cut power to it immediately and instead of going through the normal shut-down option, I just popped out the battery? Would my drive still be encrypted if someone else turned it on? Or would it be unencrypted still from my last use?

  3. #23
    Join Date
    Oct 2006
    Beans
    4,627
    Distro
    Kubuntu 16.10 Yakkety Yak

    Re: Best Encryption Software?

    Quote Originally Posted by GrantStoner View Post
    This brings up another question I had. Say, for some reason, I booted and unencrypted my laptop and was using it like normal, but for whatever reason I needed to cut power to it immediately and instead of going through the normal shut-down option, I just popped out the battery? Would my drive still be encrypted if someone else turned it on? Or would it be unencrypted still from my last use?
    It would still be encrypted.
    Blog | Ubuntu User #15350 | Zsh FTW | Ubuntu Security | Nothing to hide?
    AMD Phenom II X6 1075T @ 3GHz, Nvidia GTX 650, 8GB DDR3 RAM, 1 X 1TB, 2 X 3TB HDD
    Please don't request support via PM


  4. #24
    Join Date
    Jun 2010
    Location
    Sacramento, CA
    Beans
    196
    Distro
    Xubuntu 11.04 Natty Narwhal

    Re: Best Encryption Software?

    Awesome. Does anyone here know what encryption algorithm Ubuntu/LUKS will use then I'm setting up my new system? Do I have a choice? Or is there only one?

  5. #25
    Join Date
    Oct 2006
    Beans
    4,627
    Distro
    Kubuntu 16.10 Yakkety Yak

    Re: Best Encryption Software?

    Quote Originally Posted by GrantStoner View Post
    Awesome. Does anyone here know what encryption algorithm Ubuntu/LUKS will use then I'm setting up my new system? Do I have a choice? Or is there only one?
    AES is the default but there are others to choose from.
    Blog | Ubuntu User #15350 | Zsh FTW | Ubuntu Security | Nothing to hide?
    AMD Phenom II X6 1075T @ 3GHz, Nvidia GTX 650, 8GB DDR3 RAM, 1 X 1TB, 2 X 3TB HDD
    Please don't request support via PM


  6. #26
    Join Date
    Jun 2010
    Location
    Sacramento, CA
    Beans
    196
    Distro
    Xubuntu 11.04 Natty Narwhal

    Re: Best Encryption Software?

    Thanks everyone, looks like I'm pretty set now.

  7. #27
    Join Date
    Jun 2010
    Location
    Sacramento, CA
    Beans
    196
    Distro
    Xubuntu 11.04 Natty Narwhal

    Re: Best Encryption Software?

    Alright everyone, crypt setup was successful. Thanks for the help. If possible, I was wondering where/how I could get a program or if there was a way to test the encryption now, just to make sure there's no holes or anything. And also, I was not presented with an option to change the encryption algorithm (or cascade), so I was hoping to be able to test the default now and make sure it's golden.

  8. #28
    Join Date
    Jan 2008
    Location
    USA
    Beans
    971
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Best Encryption Software?

    Quote Originally Posted by GrantStoner View Post
    Alright everyone, crypt setup was successful. Thanks for the help. If possible, I was wondering where/how I could get a program or if there was a way to test the encryption now, just to make sure there's no holes or anything. And also, I was not presented with an option to change the encryption algorithm (or cascade), so I was hoping to be able to test the default now and make sure it's golden.
    You can change the algorithm from within the menu (I can't recall how off my head, but it can be done).

    In any case, the default is aes-256-cbc with SHA256. This is extremely strong (probably too strong since your password likely is nowhere near 256 bits in strength).

  9. #29
    Join Date
    Jun 2010
    Location
    Sacramento, CA
    Beans
    196
    Distro
    Xubuntu 11.04 Natty Narwhal

    Re: Best Encryption Software?

    I'm not sure how many bits it is, but it's either 64 or 65 characters long, and includes capitals, lower case letters, and special characters. How would you tell how many bits your pw is? And you said you can change the algorithm from within the menu? Is this the menu as you're installing Ubuntu? Or is there some kind of menu within Ubuntu I can use to change preferences?

  10. #30
    Join Date
    Oct 2006
    Beans
    4,627
    Distro
    Kubuntu 16.10 Yakkety Yak

    Re: Best Encryption Software?

    Quote Originally Posted by GrantStoner View Post
    I'm not sure how many bits it is, but it's either 64 or 65 characters long, and includes capitals, lower case letters, and special characters. How would you tell how many bits your pw is? And you said you can change the algorithm from within the menu? Is this the menu as you're installing Ubuntu? Or is there some kind of menu within Ubuntu I can use to change preferences?
    During the install there is a menu where you can choose what algorithm to use. I don't remember exactly where it is, but it's definitely there because I've used it before.
    Blog | Ubuntu User #15350 | Zsh FTW | Ubuntu Security | Nothing to hide?
    AMD Phenom II X6 1075T @ 3GHz, Nvidia GTX 650, 8GB DDR3 RAM, 1 X 1TB, 2 X 3TB HDD
    Please don't request support via PM


Page 3 of 4 FirstFirst 1234 LastLast

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •