// Verify data is wiped
        for (byte b : data) {
            assertEquals(0, b, "All bytes should be zero after wipe");
        }
    }

    @Test
    public void testSecureWipeNull() {
        // Should not throw
        SecureKeyManager.secureWipe(null);
    }

    @Test
    public void testKeyRotation() throws GeneralSecurityException {
        String sessionId = "rotation-test";