[vvillena]

These kinds of solutions are already deployed in some places. A trusted ID server creates a bunch of anonymous keys for a person, the person uses these keys to identify in pages that accept the ID server keys. The page has no way to identify a person from a key.

The weak link is in the ID servers themselves. What happens if the servers go down, or if they refuse to issue keys? Think a government ID server refusing to issue keys for a specific person. Pages that only accept keys from these government ID servers, or that are forced to only accept those keys, would be inaccessible to these people. The right to ID would have to be enshrined into law.