name: PIK
full_form: ProSe Integrity Key
context: When calculating a PIK or PEK from PTK or KD-sess, the following parameters shall be used to form the input S to the KDF that is specified in Annex B of TS 33.220 [5]: - FC = 0x4B - P0 = 0x00 if PEK is being derived or 0x01 if PIK is being derived - L0 = length of P0 (i.e. 0x00 0x01) - P1 = algorithm identity - L1 = length of algorithm identity (i.e. 0x00 0x01) NOTE: Void. The algorithm identity shall be set as described in TS 33.401 [21]. The input key shall be the 256-bit PTK or the 256-bit KD-sess. For an algorithm key of length n bits, where n is less or equal to 256, the n least significant bits of the 256 bits of the KDF output shall be used as the algorithm key.
description: The ProSe Integrity Key (PIK) is a parameter used in the calculation of keys from PTK and KD-sess, specifically for deriving integrity keys in the context of Proximity-based Services (ProSe). It is an essential component in ensuring secure communication within the network.
explanation: Based on the provided description, PIK is classified as a Parameter because it is explicitly defined as such and used in key derivation processes.
section_title: A.4	Calculation of keys from PTK and KD-sess
biotag_Context: O,O,O,B-Parameter,O,B-Parameter,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,B-Specification,O,O,O,B-Parameter,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Miscellaneous,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Specification,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,O
biotag_Description: O,B-Parameter,I-Parameter,I-Parameter,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O