Real-time Certificate Validation Service by Client’s Selective Request

Abstract

The application of PKI(Public Key Infrastructure) was enlarged with the development of Internet. The certificate using services to validate the public key are increasing according to this. To verify the certificate, the client must confirm the availability of certificate’s current status first. Various methods to validate the certificate have been proposed so far and the most of them are CRL-based. But those CRL-based methods have many problems because of the CRL’s periodicity. Therefore, the CA in the field that requires frequent modification needs to provide the latest certificate status information to the client in a real-time. In this paper, we propose a new model which can offer the timely certificate status information to the client in a real-time, we called RCVM. Also, we define the MITP(Modified Information Transmission Protocol), and the selective request and response message. The RCVM is that client does not incur the overhead of certificate status validation and the certificate status validation service provides information about a selective request of the client.