Algorithm 4.  $Kyber\_Encap(bi=(b,f))$

1: $y\leftarrow {\left\{0,1\right\}}^{256}$

2: $(\widehat{L},{\gamma }^{\prime },q^{\prime }):=G(gi,y^{\prime })$

3: $(\alpha ,\beta ):=Kyber\_CPA\_En((\mu ,f),y^{\prime };{\gamma }^{\prime })$

4: $d:=(\alpha ,\beta ,q)$

5: $\mathrm{L}:=H(\widehat{\mathrm{L}},d)$

6: return $(d,L)$