The License System Response

The license system first attempts to authenticate the message digest that the application sends as the challenge by performing the following steps:

1. Look up the secret stored within the license.
2. Compute a message digest with the MD4 Message-Digest Algorithm supplied by RSA Data Security, Inc.
3. Compare this message digest to the one passed by the application initiating the challenge.
4. Compute another message digest and passes it in the LS_MSG_DIGEST structure as the challenge response back to the application. The result of this encryption scheme is unique. For additional information about the format of this message digest, see LS_CHALLDATA.

The server cannot respond correctly to the challenge if it does not have the secrets associated with a particular license. The license system does not return a challenge response if either a license request or an update is unsuccessful.