Lot's of really exciting updates! Representing exchangeable booster packs is a great application for tokens.

With this update, the cards in booster packs are now generated at the time the packs are opened. This means that opening packs now requires a transaction to the blockchain which takes a few seconds.

Does the new protocol also use key stretching (e.g. PBKDF2) to prevent witnesses from being able to reveal pack contents before mining them?