Centralized Key storage concerns

[joehand]

There are a few impacts of storing secret key in one place:

1. If data storage is not centralized, you could have two applications writing to the same dat stored in two separate locations.
2. Two separate applications could write to same dat in same place (a lock of some sort would solve this).
3. A user that wants to download their own Dat as a non-writer couldn't (e.g. Dat would look up the secret key for that Dat, find it, and make it writable).