Algorithm 1 Confusion Mechanism Encode Algorithm (CMA-E)

Require: User information Ensure: Encoded user information   $\overrightarrow{Lo}\leftarrow$ longitude;   $\overrightarrow{La}\leftarrow$ latitude;   $Ke{y}_a=(\alpha ,\beta )$;   $Ke{y}_h=(\mu ,\nu )$;   $Ke{y}_o=({\mu }^{{}^{\prime }},{\nu }^{{}^{\prime }})$;   Matrix P and matrix Q;   if sex=man then    $se{x}^{{}^{\prime }}$←01;   else    $se{x}^{{}^{\prime }}$←02;   end if   $\overrightarrow{L{o}^{\prime }}\leftarrow \overrightarrow{Lo}\times Q$;   $\overrightarrow{L{a}^{\prime }}\leftarrow \overrightarrow{La}\times P$;   $\widehat{age}\leftarrow age\times \alpha +\beta$;   $fun\left(hobby\right)\leftarrow \lambda \times (\widehat{f}\left(hobby\right)-\nu )mod\left(26\right)$;   $fun\left(occupation\right)=\gamma \times (\widehat{f}\left(occupation\right)-{\nu }^{{}^{\prime }})mod\left(26\right)$;   Combine coding information in order   which as $ID,se{x}^{{}^{\prime }},\widehat{age},\widehat{f}\left(hobby\right),\widehat{f}\left(occupation\right),L{o}^{{}^{\prime }},L{a}^{{}^{\prime }},sensingdata,Time$