New article on Intel's 3DXP

Article: Intel’s Plans for 3DXP DIMMs Emerge
By: Anne O. Nymous (not.delete@this.real.address), December 12, 2018 12:14 am
Room: Moderated Discussions
Maynard Handley (name99.delete@this.name99.org) on December 11, 2018 4:32 pm wrote:
> Anon (no.delete@this.email.com) on December 11, 2018 4:21 pm wrote:
> > Maynard Handley (name99.delete@this.name99.org) on December 11, 2018 7:20 am wrote:
> > >......
> > > The crypto has to be appropriate to the problem. This is NOT the equivalent of network crypto.
> > > For example, suppose the equivalent of a random key burned into the device is XOR'd with everything
> > > going into and out of an MRAM cache (maybe also XOR-in the relevant addresses).
> > > Is that good enough? On the off-chance that someone could extract the contents
> > > of the MRAM cache (which may or may not be true?) the assumption is always
> > > that they CANNOT extract the contents of these sorts of hardware keys.
> >
> > Such a scheme would be about as secure as writing a key on a yellow postit on your monitor.
>
> Why do you say that?
> This is not a situation where one can watch a constant stream of data and extract statistics.
> My threat model is that someone steals a laptop, delids the chip, and has access to the
> frozen contents of the MRAM data. Not even the cache tags, just a collection of lines
> of data; and not a constant, changing, stream of data as the CPU executes.

Mmmh, but could said attacker not try to log-in for a few times to make sure that known code (from the login routine) resides in the cache (and maybe do a memory snapshot before and after and compare). And then the proposed single static key is 'toast', no?


>
> Is that the threat model you believe you have in mind? If not, well, we are not discussing the same thing.
>
>
> > Unfortunately the fact is that good encryption is hard, and somewhat computationally involved.
> >
> > Not to mention the fact that with a static key, both ends
> > need that key, as as soon as it leaks, its game over.
>
> Slogans are great. But the relevance of this one is not especially clear to me.
>
> I would be the first to admit that I know very little about crypto. But I know enough to know that not every
> threat model is the same. AND that this fact is not obvious to many people (hence the split between, eg, the
> way Apple implemented a very different sort of crypto model for iOS compared to where Android started).

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TopicPosted ByDate
New article on Intel's 3DXPDavid Kanter2018/07/23 09:02 AM
  New article on Intel's 3DXPGroo2018/07/23 12:53 PM
    New article on Intel's 3DXPMichael S2018/07/23 01:47 PM
  New article on Intel's 3DXPTeemo2018/07/23 04:38 PM
    New article on Intel's 3DXPWes Felterw2018/07/23 08:41 PM
    Flash DIMMs = bad ideaDavid Kanter2018/07/24 03:31 AM
      Flash DIMMs = bad ideaEmil Briggs2018/07/24 05:30 AM
        Flash DIMMs = bad ideaDavid Kanter2018/07/24 05:49 AM
          Flash DIMMs = bad ideaMichael S2018/07/24 05:59 AM
          Flash DIMMs = bad ideaEmil Briggs2018/07/24 07:29 AM
          Flash DIMMs = bad ideaDoug S2018/07/24 07:49 AM
            price Michael S2018/07/24 02:16 PM
              price Doug S2018/07/24 02:32 PM
                price Michael S2018/07/24 02:49 PM
            Flash DIMMs = bad ideablaine2018/12/03 03:40 PM
              Flash DIMMs = bad ideaWes Felter2018/12/04 11:07 AM
                Flash DIMMs = bad ideaRichardC2018/12/04 03:09 PM
        Flash DIMMs = bad ideaMichael S2018/07/24 05:51 AM
        Flash DIMMs = bad ideaAdrian2018/07/24 06:35 AM
          Flash DIMMs = bad ideaRicardo B2018/07/24 08:24 AM
        Flash DIMMs = bad ideabakaneko2018/07/24 05:55 PM
  New article on Intel's 3DXPEtienne2018/07/25 04:02 AM
  New article on Intel's 3DXPHoward Chu2018/12/01 05:23 AM
    New article on Intel's 3DXPMichael S2018/12/01 07:56 AM
      New article on Intel's 3DXPanon2018/12/01 08:21 AM
        New article on Intel's 3DXPHoward Chu2018/12/01 12:52 PM
          New article on Intel's 3DXPAdrian`2018/12/01 02:43 PM
            New article on Intel's 3DXPAdrian2018/12/01 10:05 PM
              New article on Intel's 3DXPHoward Chu2018/12/11 04:17 AM
                New article on Intel's 3DXPAdrian2018/12/11 04:42 AM
                New article on Intel's 3DXPMaynard Handley2018/12/11 07:20 AM
                  New article on Intel's 3DXPwumpus2018/12/11 08:36 AM
                  New article on Intel's 3DXPAnon2018/12/11 04:21 PM
                    New article on Intel's 3DXPMaynard Handley2018/12/11 04:32 PM
                      New article on Intel's 3DXPAnon2018/12/11 11:29 PM
                        New article on Intel's 3DXPMaynard Handley2018/12/12 10:32 AM
                          New article on Intel's 3DXPwumpus2018/12/12 11:07 AM
                            New article on Intel's 3DXPMaynard Handley2018/12/12 11:41 AM
                              New article on Intel's 3DXPAnon2018/12/12 02:55 PM
                          New article on Intel's 3DXPAnon2018/12/12 02:49 PM
                      New article on Intel's 3DXPAnne O. Nymous2018/12/12 12:14 AM
                        New article on Intel's 3DXPanon2018/12/12 05:28 AM
                        New article on Intel's 3DXPMaynard Handley2018/12/12 10:26 AM
                          New article on Intel's 3DXPAnne O. Nymous2018/12/12 01:10 PM
                      New article on Intel's 3DXPinnocent bystander2018/12/12 09:34 PM
                New article on Intel's 3DXPanon2018/12/12 01:42 PM
            New article on Intel's 3DXPHoward Chu2018/12/02 04:53 AM
              New article on Intel's 3DXPAdrian2018/12/02 06:01 AM
                New article on Intel's 3DXPHoward Chu2018/12/02 10:34 AM
                  Intel's 3DXP availabilityEtienne Lorrain2018/12/03 03:50 PM
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