void EncryptUsingDifferentKeys() throws Exception {
   // Create VirtualMachineConfigSpec and VirtualDeviceConfigSpec 
   VirtualMachineConfigSpec vmConfigSpec = new VirtualMachineConfigSpec();
   VirtualDeviceConfigSpec diskSpec = new VirtualDeviceConfigSpec();
   // Get VirtualMachineProfileSpec for encryption profile you created and name it 
   VirtualMachineProfileSpec encryptionProfile = new VirtualMachineDefinedProfileSpec();
   // Get VirtualDisk for disk to be reconfigured as shown in VMReconfig and name it 
   diskSpec.setDevice(disk);
   diskSpec.setOperation(VirtualDeviceConfigSpecOperation.EDIT);
   // Add encryption profile to VirtualDeviceConfigSpec 
   diskSpec.getProfile().add(encryptionProfile);
   // Create CryptoSpec for disk encryption and get KeyId from from CryptoManager 
   // See CryptoManager for details on generating or retrieving CryptoKeyId 
   CryptoSpecEncrypt cryptoSpecForDisk = new CryptoSpecEncrypt();
   cryptoSpecForDisk.setCryptoKeyId(keyIdForDiskEncryption);
   // Add CryptoSpecEncrypt to diskSpec backing 
   VirtualDeviceConfigSpecBackingSpec backingSpec = new VirtualDeviceConfigSpecBackingSpec();
   backingSpec.setCrypto(cryptoSpecForDisk);
   diskSpec.setBacking(backingSpec);
   // When encrypting a VirtualDisk, the virtual machine home must also be encrypted. 
   // You can choose the same key to encrypt VM home and disk, or use different keys. 
   // Create CryptoSpec for VM Home encryption and get KeyId from CryptoManager. 
   CryptoSpecEncrypt cryptoSpecForVMHome = new CryptoSpecEncrypt();
   cryptoSpecForVMHome.setCryptoKeyId(keyIdForVMHomeEncryption);
   // Set cryptoSpec and profile for encrypting virtual machine home 
   vmConfigSpec.setCrypto(cryptoSpecForVMHome);
   vmConfigSpec.getVmProfile().add(encryptionProfile);
   // Set the device changes 
   vmConfigSpec.getDeviceChange().add(diskSpec);
}