Initializes this exemption mechanism with a key.
If this exemption mechanism requires any algorithm parameters
that cannot be derived from the given
key, the underlying
exemption mechanism implementation is supposed to generate the required
parameters itself (using provider-specific default values); in the case
that algorithm parameters must be specified by the caller, an
InvalidKeyException is raised.
|the key for this exemption mechanism|
|if the given key is inappropriate for this exemption mechanism.|
|if problem(s) encountered in the process of initializing.|