Network activation instructions for Mathematica 8 and higher: After Installation. Upon receipt of the activation key, enter the activation key and click Activate.

If you received a copy of our software from your college or site, please contact your Site Administrator or software distributor. An activation key comes with any copy of a product from Wolfram Research. If you received your software directly from Wolfram Research and have registered it, your activation key is available on the. Finding Your Activation Key in the User Portal • Go to and log in using your and password. If you have trouble accessing your account,.

• Once inside, click the tab titled My Products and Services. This page lists all your Wolfram products. The example below lists Mathematica for Sites. • Under the Product heading, click the product for which you want the activation key. In the example above, you would click the red Mathematica for Sites link. • The product license page appears, listing your activation key(s). In the example below, the activation key is 1234-5678-ABCDEF.

Blestyaschie foni dlya fotoshopa. Finding Your Activation Key in the Help Menu of your Activated Wolfram Product • Start your Wolfram product. If you are unable to start your product, use the User Portal method outlined above. • Navigate to Help ► About Wolfram Mathematica on Windows or Linux, or Mathematica ► About Wolfram Mathematica on Mac. Your activation key is displayed in the window that appears. Finding Your Activation Key by Evaluating Directly in a Wolfram Notebook • Start your Wolfram product. If you are unable to start your product, use the User Portal method outlined above.

• Open a new notebook and evaluate $ActivationKey.

When I originally wrote this answer it was under an assumption that the question was regarding 'offline' validation of licence keys. Most of the other answers address online verification, which is significantly easier to handle (most of the logic can be done server side). Check tis article on which covers the following requirements: • License keys must be easy enough to type in. • We must be able to blacklist (revoke) a license key in the case of chargebacks or purchases with stolen credit cards. • No “phoning home” to test keys. Although this practice is becoming more and more prevalent, I still do not appreciate it as a user, so will not ask my users to put up with it. • It should not be possible for a cracker to disassemble our released application and produce a working “keygen” from it.

This means that our application will not fully test a key for verification. Only some of the key is to be tested. Further, each release of the application should test a different portion of the key, so that a phony key based on an earlier release will not work on a later release of our software. • Important: it should not be possible for a legitimate user to accidentally type in an invalid key that will appear to work but fail on a future version due to a typographical error. I've not got any experience with what people actually do to generate CD keys, but (assuming you're not wanting to go down the road of online activation) here are a few ways one could make a key: • Require that the number be divisible by (say) 17.