random(?)

[Mavroyanopoulos Nikos]

On Fri, Feb 12, 1999 at 02:15:04AM +0200, Christos Ricudis wrote:

> To /dev/random dhmiourgei random numbers kanontas md5 hashing se non-
> deterministic data poy pairnei apo to periballon - to xronismo metaksy twn
> keyboard interrupts, ta scan codes poy eisagontai, thn 8esh toy pontikarou, to
> xronismo metaksy disk accesses, ktl ktl ktl. Einai arketa palia idea sthn
> pragmatikothta, kai ayth einai mia poly kalh ylopoihsh ths. 8a htan poly omorfo
> an h rand() ths glibc xrhsimopoiouse to /dev/random sto linux. 

Argisa ligo na apantisw alla koitaxa merika pragmata sto metaxy. H rand()
dinei statistika tyxaious arithmous kai oxi tyxaious me tin ennoia pou 
xrhsimopoioume synithos. Oi arithmoi autoi den einai aprovleptoi. Ena
statistiko programma tha mporouse aneta na tous xrhsimopoiei, otidipote allo
omws dystixws prepei na brei kapoia alli pigi. Einai kati san ta biblia
me tyxaious arithmous, einai men ena megalo biblio (exei megali periodo)
alla paremenei provlepsimo, Kati pou den dieukrinizetai dystixws sto
manual tis libc.

> Kai, oxi, paromoio pragma den yparxei by default toulaxiston se kanena allo
> Unix poy gnwrizw. 
Eida oti to gnupg, xrhsimopoiei to /dev/srandom sto openbsd kai to
/dev/random sta alla bsd.

> --
> Christos Ricudis

-- 
Nikos Mavroyanopoulos
        nmav at i-net.paiko.gr
--
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