private String encryptTransposition(String message, String key) {
    int awd = Math.ceil(message.length()/key.length());
    char[][] grid = new char[key.length()][awd];
    char[] x = key.toCharArray();
    char[] y = message.toCharArray();
    for(int i = 0;i < key.length;i++)
    {
        grid[i][0] = x[i];
    }
    int index = 0;
    int flag = 0;
    for(int i = 0; i < message.length; i++){
    for(int j = awd -1; j >=0; j--){
        grid[i][j] = y[index];
        if(index==message.length) { flag=1; break;}
    }
    if(flag==1)break;
    }
    for(int i=0; i<awd; ++i){
        for (int j=1; j<key.length; ++j) {
            System.out.print(grid[i][j]);
        }
    }

}