code: public void registerDefaultSecurityDomain(SecurityDomain securityDomain) 
  	{
  		securityDomains.put(SecurityDomain.DEFAULT_SECURITY_DOMAIN,securityDomain);
  		registerSecurityDomain(securityDomain);
  		isDefaultSecurityDomainRegistered = true;
  		if (LOGGER.isDebugEnabled())
  			LOGGER.debug("Security domain "+securityDomain.getName()+" has been successfully registered as the Default security domain.");
  
  	}
docs: Registers the properies file to be used as the default security domain. The security domain object is also registered under its
  given name taken from the {@link SecurityDomain#getName()} method.
  <p>About the Security Domain name
  <br>The security domain name is used as a key by subsequent calls such as {@link #registerURItoSecurityDomain(URI, String)}
  to associate the security properties registered here.
  <ul>
  <li>The name DEFAULT is a special domain name which specifies the domain which will be used for a URI in the absence
  of a explicit domain registered the URI
  <li>Other than DEFAULT any other name is allowed, and is up to the calling application to choose.
  </ul>
  @param securityDomain
  @return