name: ERP
full_form: EAP Re-authentication Protocol
context: In order to perform re-authentication, the UE and the network shall derive corresponding ERP Keys. Those ERP keys are derived from the EMSK that is derived during the first EAP exchange in clause 6.2 step 12. The ERP implicit bootstrapping consists of deriving the ERP keys and providing those keys to the ER server during the full EAP authentication. At the end of the ERP bootstrap phase both UE and ER server share keying material for further re-authentication. NOTE: Only the ERP Implicit Bootstrapping mode defined in IETF RFC 6696 [46] is supported.
description: EAP Re-authentication Protocol (ERP) is a protocol used for re-authentication of user equipment (UE) in the network. It enables the derivation of ERP keys from the EMSK, which is obtained during the initial EAP exchange, and provides those keys to the ER server for further re-authentication.
explanation: The text explicitly states that ERP is a protocol used for re-authentication, outlining its function in deriving keys for this process. This clearly identifies it as a type of communication protocol.
section_title: 6.6.2.1	General
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biotag_Description: B-Protocol,I-Protocol,I-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,O,O,O,O,O