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It’s hard to hit moving targets, but subscribers to 4G and LTE networks need to be assured that their data has better protection than just being part of a high volume, fast-moving flow of traffic. This is a key issue with LTE architectures – the connection between the cell site and the core network is not inherently secure.

Operators have previously not had to consider the need for secure backhaul.

2G and 3G services use TDM and ATM backhaul, which proved relatively safe against external attacks.  What’s more, 3rd Generation Partnership Project (3GPP) based 2G and 3G services provide inbuilt encryption from the subscriber’s handset to the radio network controller.  But in LTE networks, while traffic may be encrypted from the device to the cell site (eNB), the backhaul from the eNB to the IP core is unencrypted, leaving the traffic (and the backhaul network) vulnerable to attack and…

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