Astran's Fragmentation: Threshold Secret Sharing

Threshold Secret Sharing (TSS) is a cryptographic technique for dividing a secret into multiple shares (n), such that any subset of shares of size greater than or equal to a threshold (k) can be used to reconstruct the secret, but any subset of shares smaller than the threshold (k) cannot.

Threshold Secret Sharing (TSS) is often used in applications where it is important to distribute a secret among a group of people/entities, but it is also important to prevent any individual or small group of people/entities from accessing the secret.

There are many different threshold secret sharing schemes. Astran's implementation of Threshold Secret Sharing is to divide the previously built AONT package into multiple shares. Each share it then stored on a different cloud provider as shown in the following figure:

Figure: AONT combined with Secret Sharing and decentralized storage

Threshold Secret Sharing is a secure and versatile cryptographic technique that can be used in a variety of applications. It is a valuable tool for protecting sensitive information and ensuring that it is only accessible to authorized individuals.