javax.crypto
介面 
SecretKey
類別 
Cipher
CipherInputStream
CipherOutputStream
CipherSpi
EncryptedPrivateKeyInfo
ExemptionMechanism
ExemptionMechanismSpi
KeyAgreement
KeyAgreementSpi
KeyGenerator
KeyGeneratorSpi
Mac
MacSpi
NullCipher
SealedObject
SecretKeyFactory
SecretKeyFactorySpi
異常 
BadPaddingException
ExemptionMechanismException
IllegalBlockSizeException
NoSuchPaddingException
ShortBufferException