HUT Comms.
Lab, Timo O. Korhonen
31
Security and secrecy*
nServices require
usually security & serrecy, e. g. reliable, shielded
transfer. Especially for
nrescue services
npolice
ndefense force
nsome special
applications as telesurgery
nNetworks can
provide this by using:
nfixed lines
(PSTN, frame relay)
nflexible routing
(SS7)
nscrambling or
encryption (PLMNs)
ncoding or
ciphering (in all modern telecom links
& nets)
nOften reassured
in several network levels
• Message goes to the right receiver
• Others can not do eavesdropping
*