passwd problima

[Mavroyanopoulos Nikos]

On Sun, May 30, 1999 at 02:58:14AM +0300, Giorgos Keramidas wrote:

> On Sat, May 29, 1999 at 11:44:10PM +0300, George Chlapoutakis wrote:
> | DarkSYN wrote:
> | You speak truly, agaphte Kwsth. In deed, pareleipsa na elegksw auto to
> | 8ema...!!! My humble apologies!
> | Whatever the case, ti peirazw gia na mporw na vazw megala password kai
> | ti glitches yparxoune ws antalagma?
> | Filika
> | Giwrgos Xlapoutakis
> 
> Koitakse... av to password sou exei mnkos 8 xaraktnrwv, kai
> xrnsimopoieis se auto opoiodnpote suvduasmo xaraktnrwv apo to suvolo:
>     [a-zA-Z0-9!@#$%^&*()-=+|.]
> Tote oi suvduasmoi pou uparxouv eivai: 8 ^ 77 , to opoio (va eivai kala
> o xrusos av0rwpos pou eftakse to bc(1) tns gnu) eivai iso me:
>     3450873173395281893717377931138512726225554486085193277581262111899648

Kai omws den einai tosoi polloi oi syndyasmoi. To crypt(3) xrhsimopoiei
ton DES pou exei megisto kleidi 56 bit. Ara oi synolikoi syndyasmoi einai
2^56==72057594037927936
Para ma para poly mikrotero apo to proigoumeno.

> Dev exw balei kommata, teleies, n alles tetoies andioules, afou to
> voumero apo movo tou milaei.  Etsi omws gia va psarwsouv ki allo osoi
> dev exouv twra koitaksei eme mia mikrn dosn aporias to monitor (exei
> ovtws tosa psnfia auto to pragma?) estw oti dokimazeis 1,000,000
> suvduasmous to deuterolepto se 65536 omades apo 1000 PC n ka0emia
> (0umizei kati se distributed.net auto se kavevav?), tote 0eleis tosa
> deuterolepta
>     52656145834278593348959013841835216159447547700274555627
Estw oti dokimazeis me ta idia mesa ston parapanw arithmo
thes 1099sec==18min
Se 18 lepta katharises:)

Apo to biblio "Cryptography and network security" tou Stallings:

Key search Machine unit cost | Expected Search Time
$100.000		     |  35 hours
$1.000.000		     |  3.5 hours
$10.000.000		     |  21 minutes


> Akoma ki etsi omws, me passwords pou kavouv expire se 3-6 mnves pisteuw
> oti 0a eprepe va ais0avesai mia sxetikn asfaleia, swsta ;
md5 encoding kai tipota ligotero:)

> Ki alla polla...
> -- 
>      ?     | Giorgos E. Keramidas, <mailto:keramida at ceid.upatras.gr>
>   >(o.o)<  | http://students.ceid.upatras.gr/~keramida/index.html
>      O     | If I had the time, I would write a smaller letter. -Pascal

-- 
Nikos Mavroyanopoulos
mailto:nmav at hellug.gr
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