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LTE: what is mapped EPS security context and how it works ?

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LTE: what is mapped EPS security context and how it works ?
posted Oct 16, 2013 by Vikram Singh

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1 Answer

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The 3G architecture also has the concept of security contexts as in LTE, and this becomes very important when 3G and 4G devices and network entities inter-operate. A 3G device that was initially attached to a 3G network has received a set of security content that is stored in the UICC. This information is considered a partial and legacy security context in the 4G environment. For a security context to be considered full, the MME should have the K-NASenc and K-NASint keys, which are obtained when the 3G device handovers to the 4G network. In this handover case, the legacy security context is called mapped EPS security context.

answer Oct 16, 2013 by Salil Agrawal
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