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Class Acme.Crypto.Des3Cipher

java.lang.Object
   |
   +----Acme.Crypto.CryptoUtils
           |
           +----Acme.Crypto.Cipher
                   |
                   +----Acme.Crypto.BlockCipher
                           |
                           +----Acme.Crypto.Des3Cipher

public class Des3Cipher

extends BlockCipher

This is a fairly standard way of increasing the security of DES. You run each block through DES three times, first encrypting with key A, then decrypting with key B, then encrypting again with key A again.

Fetch the software.
Fetch the entire Acme package.

See Also:

DesCipher, EncryptedOutputStream, EncryptedInputStream

Des3Cipher(byte[])

Constructor, byte-array key.

Des3Cipher(String)

Constructor, string key.

decrypt(byte[], int, byte[], int)

Decrypt a block of eight bytes.

encrypt(byte[], int, byte[], int)

Encrypt a block of eight bytes.

setKey(byte[])

Set the key.

 public Des3Cipher(String keyStr)

Constructor, string key.

 public Des3Cipher(byte key[])

Constructor, byte-array key.

 public void setKey(byte key[])

Set the key.

Overrides:

setKey in class Cipher

 public void encrypt(byte clearText[],
                     int clearOff,
                     byte cipherText[],
                     int cipherOff)

Encrypt a block of eight bytes.

Overrides:

encrypt in class BlockCipher

 public void decrypt(byte cipherText[],
                     int cipherOff,
                     byte clearText[],
                     int clearOff)

Decrypt a block of eight bytes.

Overrides:

decrypt in class BlockCipher

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