byte[] key1 = new byte[16];
        byte[] key2 = new byte[16];
        new SecureRandom().nextBytes(key1);
        new SecureRandom().nextBytes(key2);

        keyManager.storeSessionKey(sessionId1, key1, "AES");
        keyManager.storeSessionKey(sessionId2, key2, "AES");

        byte[] retrieved1 = keyManager.getRawKey(sessionId1);
        byte[] retrieved2 = keyManager.getRawKey(sessionId2);

            // Store keys securely
            String encKeyId = sessionId + "-enc";
            String decKeyId = sessionId + "-dec";
            keyManager.storeSessionKey(encKeyId, encryptionKey, "AES");
            keyManager.storeSessionKey(decKeyId, decryptionKey, "AES");

            // Clear local key copies for security
            this.encryptionKey = null;
            this.decryptionKey = null;

    /**
     * Store a session key
     *
     * @param sessionId unique session identifier
     * @param key the secret key to store
     * @param algorithm the key algorithm (e.g., "AES")
     */
    public void storeSessionKey(String sessionId, byte[] key, String algorithm) {
        checkNotClosed();

        if (key == null || sessionId == null) {
            throw new IllegalArgumentException("Session ID and key must not be null");
        }