Nova instituição apta a iniciar serviço de iniciação de pagamentos Pix – NeonValidação de Certificados Digitais no Ecossistema de Open Finance

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<h1 style="text-align: justify;display: block;margin: 0;padding: 0;color: #202020;font-family: Helvetica;font-size: 26px;font-style: normal;font-weight: bold;line-height: 125%;letter-spacing: normal;"><font color="#008080">Validação de Certificados Digitais no Ecossistema de Open Finance </font></h1>
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No Ecossistema do Open Finance, como uma boa prática de segurança, os participantes têm realizado a validação dos certificados digitais junto às Autoridades Certificadoras (ACs) utilizando o mecanismo de OCSP (<em>Online Certificate Status Protocol).</em> No entanto, em algumas ocasiões, certas OCSPs têm apresentado instabilidade, o que impossibilita a validação apropriada e gera erros de conectividade entre os participantes.<br/>
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É importante lembrar que os participantes transmissores/detentores e receptores/iniciadores são os únicos responsáveis pela disponibilidade de suas APIs e de APIs de seus fornecedores contratados, incluindo as ACs.<br/>
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Sendo assim, é recomendável que os receptores/iniciadores adotem boas práticas de monitoramento e, caso identifiquem alguma instabilidade nos serviços da AC contratada para emissão de seus certificados, que ela seja notificada tempestivamente para correção do problema.<br/>
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Em complemento, é recomendável aos transmissores/detentores que optaram pelo uso do OCSP, adotem boas práticas que suportem o <em>fallback</em> para alternativas de verificação da validade de certificado (por exemplo, CRL) para que as operações dos clientes não sejam impactadas por indisponibilidades temporárias deste tipo de serviço.<br/>
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<strong>OCSP <em>Stapling</em></strong><br/>
<br/>
O OCSP <em>Stapling</em> é uma técnica que pode reduzir significativamente o volume de consultas realizadas ao OCSP, uma vez que permite ao servidor web "anexar" uma resposta OCSP válida ao <em>handshake</em> TLS, evitando assim consultas diretas em todas as conexões. Recomendamos a sua adoção para melhorar a eficiência e a disponibilidade dos serviços. <br/>
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<strong>Uso de CRL</strong>
<p style="margin: 10px 0;padding: 0;mso-line-height-rule: exactly;-ms-text-size-adjust: 100%;-webkit-text-size-adjust: 100%;color: #202020;font-family: Helvetica;font-size: 16px;line-height: 150%;text-align: left;">O uso de CRLs elimina a necessidade de consultas frequentes às ACs, pois as listas de revogação de certificados podem ser baixadas e armazenadas localmente. Isso permite uma validação mais eficiente. É importante estar ciente da frequência de atualização das CRLs das ACs do ecossistema, para garantir que as informações de revogação estejam sempre atualizadas.<br/>
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<strong>Tabela de Informações das ACs</strong></p>
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<th style="border: 1px solid black; padding: 8px; text-align: center;">AC</th>
<th style="border: 1px solid black; padding: 8px; text-align: center;">Tempo de revalidação</th>
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<td style="border: 1px solid black;padding: 8px;text-align: center;mso-line-height-rule: exactly;-ms-text-size-adjust: 100%;-webkit-text-size-adjust: 100%;">Serpro</td>
<td style="border: 1px solid black;padding: 8px;text-align: center;mso-line-height-rule: exactly;-ms-text-size-adjust: 100%;-webkit-text-size-adjust: 100%;">a cada 30 min</td>
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<td style="border: 1px solid black;padding: 8px;text-align: center;mso-line-height-rule: exactly;-ms-text-size-adjust: 100%;-webkit-text-size-adjust: 100%;">Soluti</td>
<td style="border: 1px solid black;padding: 8px;text-align: center;mso-line-height-rule: exactly;-ms-text-size-adjust: 100%;-webkit-text-size-adjust: 100%;">a cada 30 min</td>
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<td style="border: 1px solid black;padding: 8px;text-align: center;mso-line-height-rule: exactly;-ms-text-size-adjust: 100%;-webkit-text-size-adjust: 100%;">Certisign</td>
<td style="border: 1px solid black;padding: 8px;text-align: center;mso-line-height-rule: exactly;-ms-text-size-adjust: 100%;-webkit-text-size-adjust: 100%;">a cada 30 min</td>
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<td style="border: 1px solid black;padding: 8px;text-align: center;mso-line-height-rule: exactly;-ms-text-size-adjust: 100%;-webkit-text-size-adjust: 100%;">Valid</td>
<td style="border: 1px solid black;padding: 8px;text-align: center;mso-line-height-rule: exactly;-ms-text-size-adjust: 100%;-webkit-text-size-adjust: 100%;">a cada 30 min</td>
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Segue abaixo os <strong>links URLs – CRL</strong> para consulta de acordo com a respectiva AC:

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