javax.crypto
インタフェース 
SecretKey
クラス 
Cipher
CipherInputStream
CipherOutputStream
CipherSpi
EncryptedPrivateKeyInfo
ExemptionMechanism
ExemptionMechanismSpi
KeyAgreement
KeyAgreementSpi
KeyGenerator
KeyGeneratorSpi
Mac
MacSpi
NullCipher
SealedObject
SecretKeyFactory
SecretKeyFactorySpi
例外 
BadPaddingException
ExemptionMechanismException
IllegalBlockSizeException
NoSuchPaddingException
ShortBufferException