A key may undergo a certification.Logical formLearned from6 sentences. A signature may revoke a (user id certification signature).Logical formLearned from6 sentences. A certificate may be signed by a (certification authority).Logical formLearned from6 sentences. A (certification authority) may issue a certificate.Logical formLearned from6 sentences. Policies may be associated with a (certification service).Logical formLearned from6 sentences. A (certification path) can be from trust.Logical formLearned from6 sentences. Policies can be for (certification paths).Logical formLearned from6 sentences. A (process certification scheme) may undergo an implementation.Logical formLearned from6 sentences. Facts may undergo a certification.Logical formLearned from6 sentences. Standards can be for (certification programs).Logical formLearned from6 sentences. A (certification system) may pertain-to persons.Logical formLearned from6 sentences. A designation can be a certification.Logical formLearned from6 sentences. A (certification scheme) can be credible.Logical formLearned from6 sentences. A (settlement class) may undergo a certification.Logical formLearned from6 sentences. (Certification standards) may pertain-to a us-state.Logical formLearned from6 sentences.