AES Encryption, Membership, and the Cryptography Block

I would like to extend the way that the SqlMembershipProvider handles encryption by using the Cryptography block.

I would like to modify the underlying SqlMembershipProvider as little as possible.

Example SqlMembershipProvider excerpt:

        protected override byte[] EncryptPassword(byte[] password)
        {
            var aesEncryptedPass = Cryptographer.EncryptSymmetric(EncryptionType, password);
            return base.EncryptPassword(aesEncryptedPass);
        }

        protected override byte[] DecryptPassword(byte[] encodedPassword)
        {
            var decryptedPass ...