Hiding Variables and Use of Section Access

[#1]

Hi.

I'm using variables for licensing my qv module.

for example i'm using a variable storing a date in it, and then i check with vb code the value of it to determine if a license is ok or not.

If Important, i'm using section access also in my qlikview module.

I ran through a problem, and it is that every use can see the variables and even edit it's values.

Can I hide a specific variable or it's value?

Can I stop a user from going the the menu and select Variable Overview option etc.?

Thank You...