Disclosed herein is a discharge valve for a compressor. A method for encryption and decryption of data, may include encrypting or decrypting data associated with an inputoutput operation based on at least one of an encryption key and a cryptographic function, wherein at least one of the encryption key and the cryptographic function are selected based on one or more characteristics associated with the data to be encrypted or decrypted. Further, penetrations of the sprays injected toward two directions are made different from each other.