Description: An entry containing the Source/Destination attributes associated with a GDOI TEK Policy, uniquely identified by the Group ID, Key Server ID and TEK Selector index. There will be one entry for each Source/Destination Policy sent by the given Key Server to its registered Group Members, each with a unique 5-tuple. However, due to the 255-octet constraint placed on an OID, the 4-tuple cannot be used to INDEX a TEK entry for a given Group ID & Key Server ID. Therefore, the TEK Selector index for a given Group ID & Key Server ID MUST be unique. The TEK SPI is part of the TEK Policy Table.