Ta Xrhsima Tutorials Toy Xrhstou Rikoudh Parousiazoyn....

[Giorgos Keramidas]

Antonis Kanavouras <ankan at med.auth.gr> wrote:
> > Mia apokleistikh paragwgh ths Christos Ricudis "Tutorials about things
> you'd
> > never want to know their existence, let aside learn" Productions.
> 
> Oso afelhs ki an akougetai se merikous h aporia mou (pou mporei kai na
> einai) einai alh8inh:
> 
> Ti pleonekthmata exei h encryption sto network layer enanti ths epilektikhs
> encryption sto application layer stis efarmoges pou ontws xreiazetai?

To basiko pleonekthma einai oti sinithos gia encryption se
network-layer den prepei o kathe user ths efarmoghs na ru8misei
katallhla tin ekastote efarmogh.  Arkei mia fora na kanei setup o
diaxeirisths kati tetoio, kai meta oi users to xrhsimopoioun epeidh
apla `uparxei', xoris perissoterous mpelades.  Auto exei diafora
pleonekthmata, opws:

  * Kentrikh diaxeirish tou encryption (apo ton administrator).

  * Transparency.  Den xreiazetai o user/efarmogh na kanei kati
    idiaitero gia na exei to encryption support.

  * Eukolia.  Efoson einai transparent, einai o,ti pio eukolo gia
    kapoion end-user.

  * Scalability.  Otan graftoun nees efarmoges, to hdh uparxon
    encryption 8a xrhsimopoieitai xoris na xreiazetai na `graftoun oi
    efarmoges me eidiko tropo'.

Fusika, gia kathe ena apo auta pou eipa parapano, mporei kapoios na
brei epixeirhmata na deijei oti anti gia pleonekthmata einai se
orismenes periptoseis meionekthmata.  P.x.

H kentrikh diaxeirish kanei ta pragmata pio eukola na ta diaxeiristei
kapoios `kentrika', kati pou einai sinithos h agaphmenh ekfrash twn
etaireiwn IT, alla tautoxrona ejartatai apo ena atomo/omada kai auto
to atomo/omada einai to `single point of failure' olou tou susthmatos.

To transparency sthn xrhsh einai kati pou se `anagkazei' na
xrhsimopoihseis to encryption, akoma kai se kapoies periptoseis pou
den tha to h8eles, klp.

Xrhsimopoihse th fantasia sou.

-giorgos