What does the directive of the European Union on Electronic Signatures deal with?

A.
Encryption of classified data

B.
Encryption of secret data

C.
Non repudiation

D.
Authentication of web servers

Explanation:
FORD, Warwick & BAUM, Michael S., Secure Electronic Commerce: Building the Infrastructure for Digital
Signatures and Encryption (2nd Edition), 2000, Prentice Hall PTR, Page 589; Directive 1999/93/