Ta Xrhsima Tutorials Toy Xrhstou Rikoudh Parousiazoyn....

[Christos Ricudis]

Ta Xrhsima Tutorials Toy Xrhstou Rikoudh Parousiazoyn....":

 AK> Oso afelhs ki an akougetai se merikous h aporia mou (pou mporei
 AK> kai na einai) einai alh8inh:

 AK> Ti pleonekthmata exei h encryption sto network layer enanti ths
 AK> epilektikhs encryption sto application layer stis efarmoges pou ontws
 AK> xreiazetai?

Poly kalh erwthsh. 

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. 

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
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)

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 :> 

4) Pros ta kei katey8ynetai to internet engineering, sto IPv6 to IPSEC einai
'sxedon' mandatory. I love standards [1]



[1] oxi, de 8elw na ksanakousw thn eksypnada me thn omorfia toy na exeis toso
polla protypa metaksy twn opoiwn mporeis na epilekseis [2]

[2] ENNOEITAI OTI DE 8ELW NA KSANAKOUSW OUTE THN EKSYPNADA ME TO FORTHGAKI
GEMISMENO ME MAGNHTOTAINIES. 

--
Christos Ricudis

In God we trust.
All others must present a valid X.509 certificate.