Privacy Preservation for Friend-Recommendation Applications

Algorithm 3

Attributes matching.

: the number of attribute groups.

Input:

: the attribute group of in the form

of cipher-text( );

: the attributes group of in the form

of cipher-text( );

, : the attribute group’s parameters set by the

;

Output: : the matching result (

)

if 0 ANDthen

fordo

;

end

end

return res;