Algorithm 1. Execution process of the PoAh

1: function PROCESSPOAH (Nnv) 2: Input: Nnv = Nnv1,Nnv2,Nnv2,...▷ a set of invalided nodes in the network 3: Nt: a trusted node that verifies the authenticity of invalid blocks. 4: Output: Nv = Nv1,Nv2,Nv3,...   ▷ a set of validated nodes in the network. 5: for each node i in Nnv do 6:        if Nt.verify(i) is true then 7:             Nv←     Ni 8:         else if Nt.verify(i) is false then 9:               Nnv ←      Ni 10:         end if 11: end for 12: Return Nv 13:  end function