GÉANT's Trusted Certificate Service is provided by DigiCert, is one of the largest worldwide Certification Authorities (CA). TCS takes advantage of a bulk purchasing arrangement whereby participating national research and education networking organisations (NRENs) may issue close to unlimited numbers of certificates provided by a commercial organisation at a significantly reduced price.
The five main types of certificates available are: SSL certificates – for authenticating servers and establishing secure sessions with end clients. Grid certificates – for authenticating Grid hosts and services (IGTF compliant). Client certificates – for identifying individual users and securing email communications. Code signing certificates – for authenticating software distributed over the internet. Document signing certificates – for authenticating documents from Adobe PDF, Microsoft Office, OpenOffice, and LibreOffice.
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