Research Article
[Retracted] HGKM: An Efficient Hybrid Group Key Management for Unmanned Autonomous Vehicles MBN in Wireless Network Environment
Table 8
The computation cost of leave activity to members.
| Group key management approaches | Computation cost | Member in immediately affected operation element | Newly chosen leader from that affected member element | Members outside the immediately affected operation element |
| HGKM | Situation (i): one member leaves one member element | | 0 | 1 | Situation (ii) one leadership contestant leaves | | 0 | 1 | Situation (iii) one leader leaves that group also one leadership contestant is ready | | 2 | 1 | Situation (iv) one leader leaves one group also never leadership contestant is ready | | 0 | 1 | LKH | H | OFT | H |
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: the tallest from that key tree to operation element; h: the tallest from that group key tree. |