Re: [ANN] Lua 5.2.0 (work5) now available

[KHMan <keinhong@...>]

On 11/6/2010 11:29 AM, pj@pjb.com.au wrote:
> Joseph Stewart wrote:
> > but what can't you do with 32-bit values that you need to do?
>
> I wrote:
> > Strong encryption ?
> > In block cyphers, you need lots of XOR ops, and block sizes of
> > 32 bits are inherently vulnerable but 64 bits are very tough...
>
> Rob Kendrick wrote:
> > It's difficult to see how simply doubling the number of bits
> > you process at once removes an inherent vulnerability.
>
> See:   http://en.citizendium.org/wiki/Code_book_attack
> [snip]
>
> The algorithms we use down here at the consumer-level are still
> 64-bit-block-size, see e.g.:
>    http://www.kremlinencrypt.com/algorithms.htm

Surely you don't think the rest of us are that foolish?

We have been doing DES in 32-bit processors for decades and nobody 
talks about 2^32 complexity... The data unit used in an 
implementation is not the same as the block size. Why do you 
equate the two, when the rest of us clearly did not?

(Of course, if you can get hold of the physical part, all sorts of 
attacks are possible. Blah blah... and so on... and so on.)

--
Cheers,
Kein-Hong Man (esq.)
Kuala Lumpur, Malaysia