An engine, register in a memory, and methods for the same are provided. The engine may include a data encryptor, a key encryptor, a data decryptor, a key decryptor, a register, and a control circuit. The data encryptor may encrypt data using a key. The key encryptor may encrypt the key used by the data encryptor. The data decryptor may receive encrypted data from a storage medium and may decrypt the encrypted data. The key decryptor may receive an encrypted key from the storage medium and may decrypt the encrypted key. The register may indicate the status of the key and/or the encrypted key. The control circuit may control the data encryptor, the data decryptor, the key encryptor, the key decryptor, and the register.