Knowledge-Based Approach for Unlocking Divided Secrets in Threshold Schemes with Privileges

Among cryptographic techniques for securing information, threshold schemes of secret sharing are also used. Such methods allow the generation of a certain number of secret parts, which require to collect of a specific number of them in order to reconstruct the information. Some protocols allow for the generation of somewhat privileged shares, which in an even smaller number allow for the restoration of secret data. This paper will describe a secret sharing protocol that will use visual authorization codes based on thematic knowledge to select privileged shares.