On Wed, 24 Apr 2002 [EMAIL PROTECTED] wrote:
> That is, to get the infinite cycle, you'd have to have some method of
> generating a uniform random integer 0 to infinity for the
> initial state, and you'd need an infinite amount of memory
> to store the current internal state. Neither of which
Title: RE: Re: disk encryption modes (Re: RE: Two ideas for random number generation)
- Original Message -
From:
[EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Saturday, April 27, 2002 12:11
PM
Subject: CDR: RE: Re: disk encryption
modes (Re: RE: Two ideas for
Title: RE: Re: disk encryption modes (Re: RE: Two ideas for random number generation)
Instead of adding 16 bytes to the size of each sector for sector IV's how about having a separate file (which could be stored on a compact flash card, CDRW or other portable media) that contains the IV&
- Original Message -
From: "Adam Back" <[EMAIL PROTECTED]>
> Joseph Ashwood wrote:
> > Actually I was referring to changing the data portion of the block
> > from {data} to {IV, data}
>
> Yes I gathered, but this what I was referring to when I said not
> possible. The OSes have 512Kbytes
Joseph Ashwood wrote:
> Adam Back Wrote:
> > > This becomes completely redoable (or if you're willing to sacrifice
> > > a small portion of each block you can even explicitly stor ethe IV.
> >
> > That's typically not practical, not possible, or anyway very
> > undesirable for performance (two dis
- Original Message -
From: "Adam Back" <[EMAIL PROTECTED]>
> On Fri, Apr 26, 2002 at 11:48:11AM -0700, Joseph Ashwood wrote:
> > From: "Bill Stewart" <[EMAIL PROTECTED]>
> > > I've been thinking about a somewhat different but related problem
lately,
> > > which is encrypted disk drives.
Right, it sounds like the same approach I alluded to, except I didn't
use a salt -- I just used a fast pseudon random number generator to
make the IV less structured than using the block number directly.
I did some experiments with a used disk and found that if you use the
block number directly f
> You could encrypt twice (CBC in each direction or something), but that
> will again slow you down by a factor of 2.
You can't easily get away with storing the IV as multiple parts of the IO
pipe like to see blocks in 2^n form.
The approach I take in Rubberhose is to calculate the IV from a
ve
On Fri, Apr 26, 2002 at 11:48:11AM -0700, Joseph Ashwood wrote:
> From: "Bill Stewart" <[EMAIL PROTECTED]>
> > I've been thinking about a somewhat different but related problem lately,
> > which is encrypted disk drives. You could encrypt each block of the disk
> > with a block cypher using the s
- Original Message -
From: "Bill Stewart" <[EMAIL PROTECTED]>
> I've been thinking about a somewhat different but related problem lately,
> which is encrypted disk drives. You could encrypt each block of the disk
> with a block cypher using the same key (presumably in CBC or some similar
--
Joseph Ashwood
> > > Because with a pRNG we can sometimes prove very important
> > > things, while with a RNG we can prove very little (we can't
> > > even prove that entropy actually exists, let alone that we
> > > can collect it).
James A. Donald:
> > Don't be silly. Of course we kno
hi,
I get the point.Thanx for all the replies.
regards Data.
--- Joseph Ashwood <[EMAIL PROTECTED]> wrote:
>
> - Original Message -
> From: "gfgs pedo" <[EMAIL PROTECTED]>
>
> > > > Oh surely you can do better than that - making
> it
> > > hard to guess the seed
> > > > is also clearl
- Original Message -
From: "gfgs pedo" <[EMAIL PROTECTED]>
> > > Oh surely you can do better than that - making it
> > hard to guess the seed
> > > is also clearly a desirable property (and one that
> > the square root "rng"
> > > does not have).
> U can choose any arbitrary seed(greater
- Original Message -
From: "Eugen Leitl" <[EMAIL PROTECTED]>
> On Mon, 22 Apr 2002, Tim May wrote:
>
> > What real-life examples can you name where Gbit rates of random digits
> > are actually needed?
>
> Multimedia streams, routers. If I want to secure a near-future 10 GBit
> Ethernet st
- Original Message -
From: <[EMAIL PROTECTED]>
To: "Tim May" <[EMAIL PROTECTED]>; "Eugen Leitl" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Sunday, April 21, 2002 1:33 PM
Subject: CDR: Re: Two ideas for random number generation
> Why would one want to implement a PRNG in silicon,
15 matches
Mail list logo
