NDH Secure Exchange Artifacts

This extension is designed to store information about the type of public certificate, the public certificate itself, and the expiration date of the certificate. Public certificates, issued by Certificate Authorities, are intended for sharing and inspection by others as part of the trust and verification process in digital communications. Each certificate includes an expiration date, which is a crucial piece of information easily accessible to anyone examining the certificate. The expiration date plays a significant role in validating the certificate's current validity and in maintaining security within digital communications. This extension should be used when the standard for exchange requires the discovery of the public key.