Patent ID: 7069441

Claim:
A registration authority comprising: means for receiving, from a device, a first message in accordance with a first protocol, wherein the first message comprises an enrollment message; means for generating, based on the first message, a second message in accordance with a second protocol; means for sending the second message to a certificate authority; means for receiving, from the certificate authority, a third message in response to the second message and in accordance with the second protocol, wherein the third message comprises a certificate authority pending response; means for generating, based on the third message, a fourth message in accordance with the first protocol; means for sending the fourth message to the device as a response to the first message; and means for generating, in response to the certificate authority pending response: a hash value based on the enrollment message; a hash table entry mapping a pending response ID, corresponding to the certificate authority pending response, to the hash value; and a transaction ID table entry mapping the transaction ID, corresponding to the enrollment message, to a pending response ID corresponding to the certificate authority pending response.