Patent ID: 9634836
Date: 2017-04-25
CPC Classifications: H04L

Claim:
1. A method of generating key shadows performed by at least one computing device including at least one tangible computing element, comprising: receiving an indication of a first number X representing how many of key shadows are to be generated; receiving an indication of a second number Y representing how many of the key shadows are to be required for decrypting an encrypted message; determining or receiving a master key for decrypting the encrypted message; and determining X key shadows of the master key, wherein Y of those key shadows is sufficient to generate a range of more than one possible master keys that can be computationally feasibly searched for the master key, and wherein less than Y of those key shadows is insufficient to determine any part of a value for the master key; wherein determining the X key shadows further comprises: wherein determining the part of each of the X key shadows further comprises: wherein each of the geometric constructs can be determined from one part of each of the X key shadows.