Comment 18 for bug 1202952

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Dolph Mathews (dolph) wrote : Re: PKI tokens are never revoked using memcache token backend

Regarding impact description: deployments using UUID tokens are not affected, only those using PKI tokens (`keystone.conf [signing] token_format = PKI`).

`UUID` is the default format in stable/folsom and `PKI` is the default in stable/grizzly. In master, `token_format` is deprecated in favor of `keystone.conf [token] provider`.