CONTENT
Foreword
Visual Installer: Using a license
key to protect an installation
Visual Installer: How to password
protect an installation
Visual Installer: How to block a
license key
CD-Menu Creator: How to protect a
document with a password
More news on Facebook
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FOREWORD
To [$Namn],
In this issue of our newsletter we will inform about how
to use a license key or a password in Visual Installer
to prevent an installation package from being installed by "wrong"
people.
We will also inform about how to use a password
to protect a document that is opened from a menu
interface created with CD-Menu Creator.
Sincerely,
Anders Persson
SamLogic Software |
USING A LICENSE KEY TO PROTECT
AN INSTALLATION
 In Visual Installer there is an installation dialog box
(see the picture below) that can be used to ask for a license key during an
installation. If the user does not have the correct
license key, the installation can not complete. The
license key assures that only users with a valid license
key can install your files.
Two types of license keys
You can use two type of license keys in Visual
Installer:
static keys and prime number based keys.
Static key
A static key is a fixed key (a fixed text) that you
specify yourself manually. It acts like a password
except that all entered characters are shown in clear
text and not with stars.
Prime number based key
Prime number based license keys are license keys that
are created by using a mathematical formula that
includes prime numbers. By combining this with a
checksum, Visual Installer can very easy check that an
entered license key is correct. You don’t need to
include a list with license keys with your installation;
pure mathematics is used to verify the license keys.
In the picture above you can see an
example of a prime number based license key (in the
License Key text box).
More information about prime number based license keys
is available in this informative blog post:
Visual
Installer: Prime number based license keys
See also
 Powerful
license key handling in Visual Installer
Visual
Installer can show visually when a license key is
correct
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HOW TO PASSWORD PROTECT AN INSTALLATION
Above we described how to protect an installation with a
license key. It is also possible to protect an
installation with a password. A password acts in a
similar way as a license key, but there are some
differences:
- entered characters are never shown on the screen
- the text used in a password is case sensitive
- only one unique password can be used per installation
In this blog post we explain more about password protected installations
and how to use the function in Visual Installer:
Visual
Installer: How to password protect an installation
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HOW TO BLOCK A LICENSE KEY
When you distribute license keys to other, it may
sometimes happen that a license key come in wrong hands,
or if you have subscription, it may happen that the user
ends the subscription of your software.
To handle a situation like this in a smooth way, you
have the possibility to block a license key from beeing
used anymore. This is especially useful when you use
prime number based license keys, because they are
created and verified mathematically.
We explain more in this blog post:
Visual
Installer: How to block a license key
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HOW TO PROTECT A DOCUMENT WITH
A PASSWORD
 Also
our menu designer tool CD-Menu Creator supports
passwords. You can enable a password for a button in a
menu, and prevent a user from opening a document or
starting an installation before he/she has entered the
correct password. CD-Menu Creator can also encrypt
documents and installation packages, so it is impossible
to open them from outside the menu. Read more here:
CD-Menu
Creator: How to protect a document with a password
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MORE NEWS ON FACEBOOK
 More
news are available on our
Facebook page. Right now you can for example read about
the new log function in Visual Installer's script
language:
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