Some on a USB hardware dongle under lock and key. We also run HSMs and the key cards to those require quorum. So the CTO, Founder and head of devops each have m

Some on a USB hardware dongle under lock and key. We also run HSMs and the key cards to those require quorum. So the CTO, Founder and head of devops each have multiple cards at home and work such that any two of them can make a quorum with all their cards, or all three can make a quorum with some of their cards.