Algorithm 1: CreateData

Require: DO’s ID, Data

onlyOwner

if Validation(DO’s ID) then

$MSK,PK=KeyGen\left(\right)$

StoreOnChain(PK)

$EF=SymEnc(F,s{k}_F)$

$CT=Encrypt(PK,ST,s{k}_F)$

metadata of Vehicle data = timestamp, location

metadata of DO-ABE data = $UID,Fid,F,H\left(EF\right)$

StoreOnChain(metadata of Vehicle data)

StoreOnChain(metadata of DO-ABE data)

StoreOffChain(Vehicle data & $(Fid,EF,CT)$)

else

REJECT Creating

end if