1. Browser security icon updates And sha-1 deprecation | digicert. Com. https://www.digicert.com/blog/browser-security-icon-updates-sha-1-deprecation
2. incident response: november 2015 google ‘pilot’ And ‘aviator’ Logged 3 Certs With Invalid Signatures
3. Sectigo Adds Acme Protocol Support In Certificate Manager Platform To Automate Ssl Lifecycle Management. 2019. https://sectigo.com/resource-library/sectigo-adds-acme-protocol-support-in-certificate-manager-platform-to-automate-ssl-lifecycle-management
4. Certificate transparency Website. Google, March 2022. https://github.com/google/certificate-transparency-community-site/blob/4ae90f78cdd821b9cb3a6884885186d71b529c87/docs/google/getting-started.md
5. Laurie, et al. Certificate Transparency. RFC 6962 (Proposed Standard), IETF, June 2013