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It doesn't encrypt SMS. It's over the air encryption for packet data (not calls or SMS) like WEP or WPA on WiFi. On GSM networks SMS was transmitted in leftover
by giantrobot 5y ago
It doesn't encrypt SMS. It's over the air encryption for packet data (not calls or SMS) like WEP or WPA on WiFi. On GSM networks SMS was transmitted in leftover signaling space on voice circuits.
- secondcoming 5y agoRACH: https://en.m.wikipedia.org/wiki/Random-access_channel https://en.m.wikipedia.org/wiki/Random-access_channel
- ronsor 5y agoIIRC "SMS over GPRS" was an optional extension