Abstract: A method of making cryptographic key metadata available to key owners while protecting the integrity of the cryptographic key metadata comprises extracting key metadata from a metadata storage on a key data storage system. The metadata storage is logically isolated from a sensitive cryptographic data storage on the key data storage system. The method further comprises transmitting, by unidirectional communication, the extracted key metadata to a user-accessible metadata database that is separate and distinct from the metadata storage on the key data storage system. The method identifies, from the user-accessible metadata database, user-specific metadata for at least one cryptographic key associated with an authorized user associated with the at least one cryptographic key, and communicates the identified user-specific metadata to the authorized user.