\item Each device registers these $i$ and $p$ with the server. \r
The server appends ‘salt’ values, $k$-bit random strings $s1$ \r
and $s2$, and generate hash values $j=h(i+s1)$ and \r
$o=h(p+s2)$ for each $i$ and $p$. All $s1$, $s2$, $j$ and $o$ \r
\item Each device registers these $i$ and $p$ with the server. \r
The server appends ‘salt’ values, $k$-bit random strings $s1$ \r
and $s2$, and generate hash values $j=h(i+s1)$ and \r
$o=h(p+s2)$ for each $i$ and $p$. All $s1$, $s2$, $j$ and $o$ \r