Skip to content

Most visited

Recently visited



public class NullCipher
extends Cipher

   ↳ javax.crypto.Cipher
     ↳ javax.crypto.NullCipher

The NullCipher class is a class that provides an "identity cipher" -- one that does not tranform the plaintext. As a consequence, the ciphertext is identical to the plaintext. All initialization methods do nothing, while the blocksize is set to 1 byte.


Inherited constants

From class javax.crypto.Cipher

Public constructors


Inherited methods

From class javax.crypto.Cipher
From class java.lang.Object

Public constructors


Added in API level 1
NullCipher ()

This site uses cookies to store your preferences for site-specific language and display options.


This class requires API level or higher

This doc is hidden because your selected API level for the documentation is . You can change the documentation API level with the selector above the left navigation.

For more information about specifying the API level your app requires, read Supporting Different Platform Versions.