code: @Override
  	public Date engineGetCreationDate(String s) {
  		try {
  			ResourceTrustAnchor trustAnchor = getCertificateEntry(s);
  			if (trustAnchor != null) {
  				return trustAnchor.getTrustAnchor().getTrustedCert()
  						.getNotBefore();
  			} else {
  				CredentialWrapper credential = getKeyEntry(s);
  				if (credential != null) {
  					return credential.getCredential().getNotBefore();
  				}
  			}
  		} catch (ResourceStoreException e) {
  			return null;
  		}
  		return null;
  	}
docs: Get the creation date for the object referenced by the alias.
  
  @param s
  The alias of the security object.
  @return The creation date of the security object.