Abstract: Methods for database recovery for encrypted indexes are performed by systems and devices. A query with a decryption key is received from a client device, where the query modifies an encrypted index of a database using a secure enclave. When events requiring remedial actions for the database occur during the querying, some transactions of the query and later queries are deferred, and a remedial action is initiated that includes restarting the database. A determination of the remedial action being unsuccessful in recovering the encrypted index causes the action to be re-performed until another query having the decryption key is received whereupon the action is performed again to recover the encrypted index utilizing the decryption key. Deferred transactions are then performed with the decryption key. When a database restarts for access without secure enclaves, the encrypted index for the database is invalidated, and the remedial actions are otherwise completed or discarded.

Abstract: A game may be executed that may provide game objects to a plurality of players such that a characteristic of the game objects for each of the plurality of players may be visible to other players. The game may also receive an arrangement for the game objects from each of the plurality of players. To begin play, the game may select a first player from the plurality of players. The game may then determine whether a first game object of the arrangement for the game objects of the selected first player may be playable. The first game object may then be removed from the game objects of the selected first player if the first game object may be playable.