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<TITLE>Encrypting an Object with DES
(Java Developers Almanac Example)
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<META CONTENT="Patrick Chan" NAME="AUTHOR">
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<B><A HREF="../javax.crypto/pkg.html">javax.crypto</A></B><font color="#666666" SIZE="-2">
[14 examples]
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<B><A HREF="../javax.crypto/pkg.html#Encrypting%20and%20Decrypting">Encrypting and Decrypting</A></B><font color="#666666" SIZE="-2">
[6 examples]
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<h3>
e466.
Encrypting an Object with DES</h3>
This example demonstrates how to encrypt a serializable object.
<pre>
try {
// Generate a temporary key. In practice, you would save this key.
// See also <a href="../javax.crypto/PassKey.html" class="eglink"><font size="-1"><b>e464</b> Encrypting with DES Using a Pass Phrase</font></a>.
SecretKey key = KeyGenerator.getInstance("DES").generateKey();
// Prepare the encrypter
Cipher ecipher = Cipher.getInstance("DES");
ecipher.init(Cipher.ENCRYPT_MODE, key);
// Seal (encrypt) the object
SealedObject so = new SealedObject(new MySecretClass(), ecipher);
// Get the algorithm used to seal the object
String algoName = so.getAlgorithm(); // DES
// Prepare the decrypter
Cipher dcipher = Cipher.getInstance("DES");
dcipher.init(Cipher.DECRYPT_MODE, key);
// Unseal (decrypt) the class
MySecretClass o = (MySecretClass)so.getObject(dcipher);
} catch (java.io.IOException e) {
} catch (ClassNotFoundException e) {
} catch (javax.crypto.IllegalBlockSizeException e) {
} catch (javax.crypto.BadPaddingException e) {
} catch (javax.crypto.NoSuchPaddingException e) {
} catch (java.security.NoSuchAlgorithmException e) {
} catch (java.security.InvalidKeyException e) {
}
public class MySecretClass implements java.io.Serializable {
String s = "the secret";
}
</pre>
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Related Examples
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e461. <a class="eglink" href="ListCipher.html?l=rel">
Listing All Available Encryption and Decryption Algorithms
</a>
<br>
e462. <a class="eglink" href="DesString.html?l=rel">
Encrypting a String with DES
</a>
<br>
e463. <a class="eglink" href="DesFile.html?l=rel">
Encrypting a File or Stream with DES
</a>
<br>
e464. <a class="eglink" href="PassKey.html?l=rel">
Encrypting with DES Using a Pass Phrase
</a>
<br>
e465. <a class="eglink" href="MakeDes.html?l=rel">
Converting a 56-bit Value to a DES Key
</a>
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See also:
<a class="eglink" href="/egs/javax.crypto/pkg.html?l=rel#Key%20Agreement">
Key Agreement
</a>
<a class="eglink" href="/egs/javax.crypto/pkg.html?l=rel#MAC">
MAC
</a>
<a class="eglink" href="/egs/javax.crypto/pkg.html?l=rel#Symmetric%20Keys">
Symmetric Keys
</a>
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