The value of the Protocol-ID field of a SA TEK (SAT) payload
which specifies the Security Protocol for a TEK.
Following are the Security Protocol values defined in
the GDOI RFC 3547, however the CgmGdoiSecurityProtocol TC
defines all possible values.
Protocol ID Value
---------------------- -----
RESERVED 0
GDOI_PROTO_IPSEC_ESP 1
RESERVED 2-127
Private Use 128-255