things people getting a shard need to know:

• whether they have successfully recombined (use MAC)
• which shards are to be collected for which secret
  • this could get kinda out of hand ...
  • we should do some simple combinations numbers on this to see how bad it gets
• knowing which algorithm to use?!
  • which module - secrets.grempe / secrets.js ... ?
  • we could brute force it with all the different libs we use over time ):