See: Description
| Interface | Description |
|---|---|
| SecretKey |
A secret (symmetric) key.
|
| Class | Description |
|---|---|
| Cipher |
This class provides the functionality of a cryptographic cipher for
encryption and decryption.
|
| CipherInputStream |
A CipherInputStream is composed of an InputStream and a Cipher so
that read() methods return data that are read in from the
underlying InputStream but have been additionally processed by the
Cipher.
|
| CipherOutputStream |
A CipherOutputStream is composed of an OutputStream and a Cipher so
that write() methods first process the data before writing them out
to the underlying OutputStream.
|
| CipherSpi |
This class defines the Service Provider Interface (SPI)
for the
Cipher class. |
| EncryptedPrivateKeyInfo |
This class implements the
EncryptedPrivateKeyInfo type
as defined in PKCS #8. |
| ExemptionMechanism |
This class provides the functionality of an exemption mechanism, examples
of which are key recovery, key weakening, and
key escrow.
|
| ExemptionMechanismSpi |
This class defines the Service Provider Interface (SPI)
for the
ExemptionMechanism class. |
| KeyAgreement |
This class provides the functionality of a key agreement (or key
exchange) protocol.
|
| KeyAgreementSpi |
This class defines the Service Provider Interface (SPI)
for the
KeyAgreement class. |
| KeyGenerator |
This class provides the functionality of a secret (symmetric) key generator.
|
| KeyGeneratorSpi |
This class defines the Service Provider Interface (SPI)
for the
KeyGenerator class. |
| Mac |
This class provides the functionality of a "Message Authentication Code"
(MAC) algorithm.
|
| MacSpi |
This class defines the Service Provider Interface (SPI)
for the
Mac class. |
| NullCipher |
The NullCipher class is a class that provides an
"identity cipher" -- one that does not transform the plain text.
|
| SealedObject |
This class enables a programmer to create an object and protect its
confidentiality with a cryptographic algorithm.
|
| SecretKeyFactory |
This class represents a factory for secret keys.
|
| SecretKeyFactorySpi |
This class defines the Service Provider Interface (SPI)
for the
SecretKeyFactory class. |
| Exception | Description |
|---|---|
| AEADBadTagException |
This exception is thrown when a
Cipher operating in
an AEAD mode (such as GCM/CCM) is unable to verify the supplied
authentication tag. |
| BadPaddingException |
This exception is thrown when a particular padding mechanism is
expected for the input data but the data is not padded properly.
|
| ExemptionMechanismException |
This is the generic ExemptionMechanism exception.
|
| IllegalBlockSizeException |
This exception is thrown when the length of data provided to a block
cipher is incorrect, i.e., does not match the block size of the cipher.
|
| NoSuchPaddingException |
This exception is thrown when a particular padding mechanism is
requested but is not available in the environment.
|
| ShortBufferException |
This exception is thrown when an output buffer provided by the user
is too short to hold the operation result.
|
Support for encryption includes symmetric, asymmetric, block, and stream ciphers. This package also supports secure streams and sealed objects.
Many of the classes provided in this package are provider-based. The class itself defines a programming interface to which applications may write. The implementations themselves may then be written by independent third-party vendors and plugged in seamlessly as needed. Therefore application developers may take advantage of any number of provider-based implementations without having to add or rewrite code.
Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2025, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.
Scripting on this page tracks web page traffic, but does not change the content in any way.