Re: lug-bg: crypto-api cipher ?

[micro@email.domain.hidden (Plamen Tonev)]

On Tue, 27 May 2003 00:57:13 -0700
Minko Markov <mmarkov_at_shaw.ca> wrote:

<em class="quotelev1">> Vesselin Kolev wrote:
<em class="quotelev1">> 
<em class="quotelev2">> > "Bug" da se chete v kavichki... da go narechem slabost.........
<em class="quotelev2">> > .......
<em class="quotelev2">> > algoritymyt e neistoichniv kakto na diferencialen cryptoanaliz, taka i na
<em class="quotelev2">> > known plain text attack (osobeno lesno, ako informaciata predi kodirane
<em class="quotelev2">> > ne e bila kompresirana). Neustoichiv e na brute force ataka s
<em class="quotelev2">> > paralelizacia na zadachata.
<em class="quotelev1">> ...........
<em class="quotelev1">> 
<em class="quotelev1">> yasno. Az sqm vizhdal spekulacii, che v dizayna na DES ima narochno
<em class="quotelev1">> ostaveni trapdoors. V edna sravnitelno stara kniga, Cryptography:
<em class="quotelev1">> Theory and Practice (Douglas Stinson, 1995, CRC Press) se kazva
<em class="quotelev1">> (citat, pp 82)
<em class="quotelev1">> 
<em class="quotelev1">> 	The S-boxes, being the only non-linear component of the cryptosystem,
<em class="quotelev1">> 	are vital to its security. ......
<em class="quotelev1">> 	However, the design criteria of the S-boxes are not completely known.
<em class="quotelev1">> 	Several people have suggested that the S-boxes might contain hidden
<em class="quotelev1">> 	"trapdoors" which would allow the NSA to decrypt messages while
<em class="quotelev1">> 	maintaining that DES is secure.
<em class="quotelev1">>
Tova se kazvashe i v edna po-general security kinga za Unix (hubava,no ostarjala), otpredi vreme ;-)
Az tova imah predvid che shte se sreshta chesto Q: za NSA i American government ;-)
 
<em class="quotelev1">> Kato kaza, che DES imal bug, si pomislih dali nyamash predvid neshto
<em class="quotelev1">> v tozi smisql, otkrito naskoro.
<em class="quotelev1">> 
<em class="quotelev1">> 
<em class="quotelev1">> Pozdravi,
<em class="quotelev1">> Minko
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<p>
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