String nonceStr = Arrays.toString(nonce);
            assertFalse(nonces.contains(nonceStr), "Nonce should be unique");
            nonces.add(nonceStr);
        }

        // Then all nonces should be unique
        assertEquals(numNonces, nonces.size(), "All nonces should be unique");
    }

    @Test
    @DisplayName("Should generate secure nonces with proper randomness")
    void testSecureNonceGenerationRandomness() {