Ta Xrhsima Tutorials Toy Xrhstou Rikoudh Parousiazoyn....

[Kekes Stamatis]

Kostas Liakakis wrote:

> Geia sou Xrhstaki...
>
> "Christos Ricudis" <ricudis at paiko.gr> wrote in message
> news:MSGID_2=3A413=2F11.98=40fidonet_9109034c at fidonet.org...
> >
> > 1) Sthn periptwsh enos VPN me apomakrysmenes 'nhsides', den mporeis na
> > ka8oriseis apo poy pernaei to traffic sou kai poios to akouei. Epilektiko
> > application-layer encryption se mia tetoia periptwsh einai sxedon adynato.
>
> Kanto mou ligo liana auto. An ta dedomena sou einai kryptygrafhmena, esto
> kai apo thn
> idia thn efarmogh, ti shmasia exei apo posa hops 0a perasei? An fysika
> 0eleis na mhn
> akougetai tipote apo to VPN sou pros ta e3o tote bebaios kai pas sthn allh
> lysh. Ypo0eto
> pos auto h0eles na peis e3arxhs. Alla kai pali, den 0a elega thn lysh
> adynath, alla ton
> administrator hli0io... :-)
>
> > 2) Ease of use. Dystyxws den yparxei akoma kanena ebraios apodekto protypo
> gia
> > application-layer encryption (should we use Telnet/STARTTLS or SSH?
> POP3/SSL or
> > POP3/STARTTLS? ktl ktl ktl). To meionekthma bebaia einai oti to encryption
> den
>
> Skepsou omos oti ena bug den 0a se 3ebrakosei entelos...

Ayto einai dikopo maxairi. Alles fores mporei na se ksevrakosei alla omso kai
alles fores na sou kanei ti zoi toso dyskoli pou asta na pane.

> > einai pantoy aparaithto, wstoso merikes fores mporei na diapistwseis oti
> sou
> > xreiazetai se periptwseis poy den mporouses na fantasteis eks'arxhs (blepe
> kai
> > to 3)
>
> Murphy muprhy...

Symfono me to Ricky :))

>
>
> > 3) Wireless networks opoy einai apo dyskolo ews adynaton na
> > kaneis eykolo access control sto MAC layer. Se megales poleis me deployed
> > amateur 802.11 networks hdh kapoioi arxisan na kykloforoun stoys dromous
> me
> > laptops kai sniffers psaxnontas kapoio diktyo gia na bgoyn ston aera :>
>
> Mpaaa... na se ypoklepsoun nai. Na bgoun ston aera mesa apo sena
> apokleietai. 0a to
> katalabaines eu0eis amesos. Apla kai mono giati 0a kobotan ena meros tou
> diktyoy sou.
> Opos kai na to koita3eis, se ena point-to-point dyktyo, mporoun na
> synhpar3oun mono
> dyo points.

Ma se wireless den einai aparaitito apo oso ksero toulaxiston na exeis sonei
kai kala PPP giati yparxoun kai Wireless ethernet's opou oloi "syndeontai" kai
antalassoun paketa meso enos asyrmatou HUB opote apo ekei mporei kapoio na mpei
mesa sto diktyo sou an fysika plirei tis proypotheseis syxnotitas ktl ktl Opote
o Ricky ki edo exei dikio.

>
>
> > 4) Pros ta kei katey8ynetai to internet engineering, sto IPv6 to IPSEC
> einai
> > 'sxedon' mandatory. I love standards [1]
>
> I couldn't agree more. To mono pou me anyshxei einai mhpos to standard
> mporei na to
> metafasoun oi diaforoi echelon. Asxetos key length. Katalabaineis...

Kala to reverse engineering den to apofeygeis apoti stigmi pou tha ginei
standard kai apo ti stigmi pou malista ha kykloforisei kai o source kodikas
aytou tou standard se kapoia OpenSource leitourgika.

> > [1] oxi, de 8elw na ksanakousw thn eksypnada me thn omorfia toy na exeis
> toso
> > polla protypa metaksy twn opoiwn mporeis na epilekseis [2]
>
> Opos elega parapano, auth h polymorfia (asxetos omorfias kai tsaxpinias klp)
> pou yparxei me thn kryptografhsh apo thn efarmogh einai anektimhth.

Kai oxi mono mporeis na enallaseis synexos ti morfi krytpografisis pragma pou
se kanei na aisthanesai pio secure an kai sto telos apodeiknyetai mazoxas aytos
pou to kanei ayto.

> > [2] ENNOEITAI OTI DE 8ELW NA KSANAKOUSW OUTE THN EKSYPNADA ME TO FORTHGAKI
> > GEMISMENO ME MAGNHTOTAINIES.
>
> Hm? :-))))

Kala tote tha diaskeyasoume tin eksypnada kai tha allaksoume tis tainies me DAT
tapes i DLT i stin kseftila floppies :)))