question: public Layer ( int vi , int viNext , SecureRandom sr ) { this . vi = vi ; this . viNext = viNext ; this . oi = viNext - vi ; this . coeff_alpha = new short [ this . oi ] [ this . oi ] [ this . vi ] ; this . coeff_beta = new short [ this . oi ] [ this . vi ] [ this . vi ] ; this . coeff_gamma = new short [ this . oi ] [ this . viNext ] ; this . coeff_eta = new short [ this . oi ] ; int numOfPoly = this . oi ; for ( int k = 0 ; k < numOfPoly ; k ++ ) { for ( int i = 0 ; i < this . oi ; i ++ ) { for ( int j = 0 ; j < this . vi ; j ++ ) { coeff_alpha [ k ] [ i ] [ j ] = ( short ) ( sr . nextInt ( ) & GF2Field . MASK ) ; } } } for ( int k = 0 ; k < numOfPoly ; k ++ ) { for ( int i = 0 ; i < this . vi ; i ++ ) { for ( int j = 0 ; j < this . vi ; j ++ ) { coeff_beta [ k ] [ i ] [ j ] = ( short ) ( sr . nextInt ( ) & GF2Field . MASK ) ; } } } for ( int k = 0 ; k < numOfPoly ; k ++ ) { for ( int i = 0 ; i < this . viNext ; i ++ ) { coeff_gamma [ k ] [ i ] = ( short ) ( sr . nextInt ( ) & GF2Field . MASK ) ; } } for ( int k = 0 ; k < numOfPoly ; k ++ ) { coeff_eta [ k ] = ( short ) ( sr . nextInt ( ) & GF2Field . MASK ) ; } }
target:  This function generates the coefficients of all polynomials in this layer at random using random generator.