Generates SSKR shares for the given Spec and Secret using the provided random number generator.
The Spec instance that defines the group and member thresholds.
The Secret instance to be split into shares.
The random number generator to use for generating shares.
A vector of groups, each containing a vector of shares, each of which is a Uint8Array.
Generates SSKR shares for the given Spec and Secret using the provided random number generator.