checkNotClosed();

        byte[] key = new byte[length];
        secureRandom.nextBytes(key);
        return key;
    }

    /**
     * Clear all stored keys
     */
    public void clearAllKeys() {
        checkNotClosed();

        log.info("Clearing all stored keys");

        // Wipe all raw keys
        for (Map.Entry<String, byte[]> entry : rawKeys.entrySet()) {

            keyManager.storeSessionKey("session-" + i, key, "AES");
        }

        assertEquals(5, keyManager.getKeyCount(), "Should have 5 keys");

        keyManager.clearAllKeys();

        assertEquals(0, keyManager.getKeyCount(), "Should have no keys after clear");

        // Verify all keys are removed
        for (int i = 0; i < 5; i++) {