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Many people ask who uses OpenCA. The problem is that we are a non-profit organization and so we have real problems to get references of existing systems. If you, your organization or your company use OpenCA and have no problem to publish this fact then please mail us. This helps us to give others an overview and they can ask a local user for it's experiences. This is sometimes more important than any other fact. We can add a small description too.
We use three OpenCA PKIs. Two Sub-CAs in the hierarchy of the DFN-PCA. This is the Root-CA of Germany`s National Research and Education Network. One CA is a private isolated root CA which is based on OpenCA 0.9.1. We use this for internal communication including key recovery.