Electronic signatures with PAdES-BES, PAdES-T, PAdES-LTV, XAdES-BES, XAdES-EPES, XAdES-T, XAdES-X-L, CAdES-BES, CAdES-EPES, CAdES-T formats. Of any Certification Services Provider, using the List of Trusted Certificates of the European Union or explicitly including any digital Certificate of Certification Authority.