Changing BitLocker Encryption Method - Windows 7

By default BitLocker uses 128Bit AES with Diffuser, You can change the BitLocker encryption strength/method by going to ...

Start menu -> Seach for Group Policy

or

Start menu -> Run -> gpedit.msc

In the Group Policy Editor go to ...

Local Computer Policy -> Administrative Templates -> Windows Components -> BitLocker Drive Encryption ->

and Choose drive encryption method

Attachment 838

Click Edit Policy then Enabled and chose your encryption method from the drop down menu.

Attachment 839

Options:
128Bit AES with Diffuser (Default)
256Bit AES with Diffuser
128Bit AES
256Bit AES