| AsymmetricCipherKeyPair | a holding class for public/private parameter pairs. |
| BufferedAsymmetricBlockCipher | a buffer wrapper for an asymmetric block cipher, allowing input
to be accumulated in a piecemeal fashion until final processing. |
| BufferedBlockCipher | A wrapper class that allows block ciphers to be used to process data in
a piecemeal fashion. |
| CipherKeyGenerator | The base class for symmetric, or secret, cipher key generators. |
| CryptoException | the foundation class for the hard exceptions thrown by the crypto packages. |
| DataLengthException | this exception is thrown if a buffer that is meant to have output
copied into it turns out to be too short, or if we've been given
insufficient input. |
| InvalidCipherTextException | this exception is thrown whenever we find something we don't expect in a
message. |
| KeyGenerationParameters | The base class for parameters to key generators. |
| PBEParametersGenerator | super class for all Password Based Encryption (PBE) parameter generator classes. |
| RuntimeCryptoException | the foundation class for the exceptions thrown by the crypto packages. |
| StreamBlockCipher | a wrapper for block ciphers with a single byte block size, so that they
can be treated like stream ciphers. |