US Patent 10904231 Encryption using multi-level encryption key derivation

Data may be encrypted using a derived block encryption key for each of at least one append blocks of data. A data operation associated with manipulating particular data associated with a user may be received. The particular data may comprise at least one append block of data. In response to the received data operation, for each append block of data of the at least one append block of data, parameters associated with deriving a block encryption key for a given append block of data of the at least one append block of data may be accessed. The parameters may comprise at least a data encryption key associated with the user and a nonce. A block encryption key may be derived for the given append block of data utilizing the parameters. The given append block of data may be encrypted utilizing the block encryption key.