Armory

This is about Shamir’s secret sharing scheme, where the main idea is based on having sufficient points to fully define a polynomial curve. A polynomial of degree $t - 1$ can only be constructed if $t$ points (shares) are known. In this challenge, only the first share is known, so it seems like we do not have any way of retrieving the value. However, we can observe two points: The coefficient $c_i$ is generated by calculating the SHA-256 hash of the previous coefficient $c_{i - 1}$....