Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!


Forgot your password?
DEAL: For $25 - Add A Second Phone Number To Your Smartphone for life! Use promo code SLASHDOT25. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. Check out the new SourceForge HTML5 internet speed test! ×

Comment Re:Yikes! (Score 2) 280

But that case was designed for the Kindle 2, which (I think?) *doesn't* put power across those pins. If that's the case, this is mostly a Kindle 3 design flaw - they should have made the slot spacing different so you couldn't use a Kindle 2 case.

Comment Re:On The Practical Side (Score 1) 467

No, no, no. For this, use a one-time pad.

What you do is this:

Take your file (A). Generate a block of high-entropy random data (B).

Now generate (A xor B), and throw away A. You now have two random files, B and (A xor B), and B xor (A xor B) will give you A again.

A cute variant: instead of generating a really random B, use pseudo-random data generated from a known key (mp3 rip of some song of a particular version of a CD, gzip of linux kernel source), and don't even keep B with you; regenerate it on the other side. There are lots of ways to screw this trick up, though, so consult a cryptographer.

You could use more than 2 files if you want, the idea is basically the same.

Comment Re:Is this chip a bargin? (Score 1) 292

A lot less; it's not a coincidence that IBM never publishes any industry-standard benchmarks on these things.

Don't get me wrong; they're fast, but they're not magic, and they're not remotely competitive on a price/raw-compute-cycle basis. If that's what you want go get a beowulf cluster.

Comment Re:What would the impacts of this be for cryptogra (Score 0) 457

Short form:if P=NP, crypto is something of a futile effort - that implies that there's a non-brute-force crack to every possible private-key algorythm. I suppose it might still be slow enough for the crypto to be useful, but I woudl expect you would end up needing gigantic keys.

Most everybody assumed that P!=NP, but nobody has been able to prove it.

Comment Re:So Many Questions (Score 1) 303

I think a tetrahedron, growing into a 8-sided d8 kind of thing, then back - a cube has six faces, but a hypercube has eight cubes for, er, faces (one on each end, and then a cube connecting the faces of each of those).

Not at all sure, though.

Slashdot Top Deals

This is the theory that Jack built. This is the flaw that lay in the theory that Jack built. This is the palpable verbal haze that hid the flaw that lay in...