Slashdot Mirror

← Back to Stories (view on slashdot.org)

Understanding Mac OS X Kernel

Posted by timothy on from the deep-in-the-heart-of-it dept.

An anonymous reader writes "Kernelthread.com has published a flash presentation overview of the Mac OS X kernel. Its title is 'A Tour of the Mac OS X Kernel' and it also covers Tiger features. Maybe interesting to note is that the slides are from a talk given to the NSA. Well, there is a nice security architecture diagram towards the end of the presentation."

11 of 57 comments (clear)

  1. amazing! by Anonymous Coward · · Score: 3, Funny

    A flash presentation that didn't turn my p4 into a 386!

    1. Re:amazing! by brilinux · · Score: 5, Funny


      What, did it turn it into a G5?

  2. Re:AES encryption under the hood? by zhiwenchong · · Score: 4, Informative

    Apparently not:
    http://en.wikipedia.org/wiki/AES#Security

  3. inside the kernel by Anonymous Coward · · Score: 5, Funny

    Does it give away the kernel's secret recipe?

  4. Keynote by TimmyDee · · Score: 4, Informative

    I'm willing to bet it's in Flash because he did the presentation in Keynote. While the SWF export in Keynote isn't great, at least it preserves transitions, fonts, and other formatting options and doesn't look like shit (like the HTML export of another presentation software).

    Plus, it takes one step to export. I haven't seen anything that will do that with CSS.

    --
    Per Square Mile, a blog about density
  5. Worthless filesystems. by Given+M.+Sur · · Score: 4, Funny

    So HFS+ can only support file sizes up to 8 exabytes. What a worthless filesystem.

    --
    nil
    1. Re:Worthless filesystems. by Chucker23N · · Score: 4, Funny

      And here I was, hoping HFS+ would provide the means to fit all my pr0n on it.

  6. Re:AES encryption under the hood? by Anonymous Coward · · Score: 3, Informative

    FS and swap encryption is used to encrypt user's home directories. This is the "File Vault" functionality of OS X. Tiger adds the ability to optionally encrypt the users swap space also (only on file vaulted home folders) to secure the users memory space as well. A file vaulted home folder becomes a sparse disk image file (a disk image that can grow in size as it's written too) that uses the users account password to open. If the user losses their account password then the admin can use the master file vault (set separately) to restore the users home directory. That scenario only really applies for multi-user systems.

    I am not sure what bit of AES is used though. I would guess 128 bit at least.

  7. Re:* Encrypted swap (optional, uses AES) by kerry-buckley · · Score: 5, Informative
    Wow.. So it looks like they finally fixed this security bug where the password could be discovered in the swap. Anyone know how to turn this feature on?
    There's a "use secure virtual memory" checkbox in the security preference pane.
  8. Re:Embedd C++ by Nuuskis · · Score: 4, Interesting

    Embedded C++ is upwards compatible subset of ANSI Standard C++. So if you have written very simple C++, for example when coming from C and making your first C++ program, you probably "used" EC++. It is just C++ without namespaces, templates, exceptions, RTTI (Runtime Type Identification), STL (Standard Template Library), and some other stuff that might make executable noticeably bigger and cause unwanted memory consumption.

  9. Re:So, HFS+ can be case-sensitive... by ahknight · · Score: 3, Informative

    Like this: http://www.codepoetry.net/archives/2003/10/26/case sensitive_hfs_for_the_masses.php