/**

@page SS_Cryptalg_signature_classes Signature classes
\n

<b>Pre-v.8.0</b>

These classes contain the structures of asymmetric algorithm signatures. Some asymmetric algorithms do not have the 
capability to perform signing and therefore will not have associated signature classes.

\c CAsymmetricSignature is the base class for signature objects, which are created and verified by asymmetric algorithms. 
The diagram below shows this base class and its derived class.

@image html asymmetric2.gif

*/