assertTrue(manager.hasSessionKey("auto-session"), "Key should exist");
        }
        // Manager should be closed automatically
    }

    @Test
    public void testSecureWipeUtility() {
        byte[] data = new byte[16];
        new SecureRandom().nextBytes(data);

        // Verify data is not all zeros initially
        boolean hasNonZero = false;
        for (byte b : data) {