Fulfilling security and safety requests regarding the data private character, the confidentiality and the integrity is essentially for the "online" business progress. Starting with emphasis the acceptance of XML technologies for documents and protocols, it is logical that even the security elements to be integrated in the XML solutions. XML security standards define XML vocabularies and processing rules to fulfill security request. These standards use inherited encrypting and security technologies and evolving XML technologies to offer a flexible, extensible and practical solution in order to carry out the security requests.