- CAdES: CMS Advanced Electronic Signatures. See: https://en.wikipedia.org/wiki/CAdES_(computing)
- ETSI: European Telecommunications Standards Institute. See: https://en.wikipedia.org/wiki/ETSI
- ICP: Same as ICP-Brasil.
- ICP-Brasil: Brazilian Public Key Infrastructure (in Pourtuguese: Infraestrutura de Chaves Públicas Brasileira). See: http://www.iti.gov.br/icp-brasil
- IETF: Internet Engineering Task Force. See: https://en.wikipedia.org/wiki/Internet_Engineering_Task_Force
- ITI: Brazilian National Information Technology Institute (in Pourtuguese: Instituto Nacional de Tecnologia da Informação). See: http://iti.gov.br
- MP 2200-2/2001: "Medida Provisória No 2.200-2, de 24 de agosto de 2001", Brazilian Federal Government. Published: 2001-08-27. URL: http://www.planalto.gov.br/ccivil_03/MPV/Antigas_2001/2200-2.htm
- PAdES: PDF Advanced Electronic Signature. See: https://en.wikipedia.org/wiki/PAdES
- RFC 5280: "Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile", IETF - Internet Engineering Task Force. Published: 2008-05. URL: https://tools.ietf.org/html/rfc5280
- XAdES: XML Advanced Electronic Signature. See: https://en.wikipedia.org/wiki/XAdES