21:38 <axu[m]> Hi, I am thinking about using Sandstorm.io for personal use. However I have one question about grains: Is a grain's persistent storage always encrypted at rest? If so, what keys are used, who can derive the keys, where/when are the keys derived and how are they revoked? (If a user decides to no longer share a grain, for example) https://sandstorm.io/how-it-works#encryption

21:38 <axu[m]> https://docs.sandstorm.io/en/latest/using/security-practices/#fine-grained-isolation