Mview base on a view?

I was just wondering if it is a valid practice to create a materialized vie=
w based on a view.  I have some columns in a table that I want to replicate=
 to another database.  However, there are other columns in the table that I=
 want to hide from the remote database.  I am specifically concerned about =
somebody querying through my db link back to the source database.  So my da=
tabase link will only be able to access a view, which hides some of the col=
umns in the table.  I was browsing through the docs and didn't find this sc=
enario.  I was curious if anybody else does this or if there is another met=
hod I should use.

Thank you,
Jay

/* In Local Database */
create table user_list (
  u_name varchar2(30),
  u_password varchar2(30),
  u_created_date date
);

create materialized view log on user_list;
grant select on mlog$_user_list to remote_user;

create view vu_user_list as
  select u_name,u_created_date
     from user_list;

grant select on vu_user_list to remote_user;

/* In remote database */

create database link source_db connect remote_user identified by secretpwd =
using 'db1';

create materialized view vu_user_list
  refresh with rowid
  as (select * from user_a.vu_user_list@source_db);

alter materialized view vu_user_list refresh fast;



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