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. 2020 Mar 12;20(6):1581. doi: 10.3390/s20061581

Algorithm 1 Generation and issuance of access policy,

a p I D

and authentication code by the KMS to the utility server

1:
$T T P \leftarrow u t i l i t y s e r v e r : U S, S G D, K_{U S}$
2:
Construction of $A P$
3:
$A C \leftarrow H_{00} = H (h_{10} | | h_{11})$
4:
$T T P \leftarrow U S : U S, S G D, K_{U S}$
5:
$a p I D \leftarrow H (S K_{S G D} | | K_{U S} | | A C)$
6:
$u t i l i t y s e r v e r \leftarrow T T P : a p I D, S G_{1}, K_{T T P}$