for (String testStr : testStrings) {
            String encrypted = cipher.encrypt(testStr);
            String decrypted = cipher.decrypt(encrypted);
            assertEquals("Failed for: " + testStr, testStr, decrypted);
        }
    }

    // Test provider as CookieResourceProvider interface
    public void test_asInterface() {

        String plainText = "Hello, World!";
        String encrypted = cryptographer.encrypt(plainText);
        assertNotNull(encrypted);
        assertFalse(plainText.equals(encrypted));

        String decrypted = cryptographer.decrypt(encrypted);
        assertEquals(plainText, decrypted);
    }

    public void test_invertibleCryptography_withEmptyString() {
        // Test with empty string

        }
    }

    /**
     * Decrypts the given data.
     *
     * @param data
     *            the data to decrypt
     * @return the decrypted data
     */
    public byte[] decrypto(final byte[] data) {
        final Cipher cipher = pollDecryptoCipher();
        byte[] decrypted;
        try {
            decrypted = cipher.doFinal(data);

                            String data = line.substring(pos + 1).trim();
                            if (properyPattern.matcher(key).matches() && data.startsWith(CIPHER_PREFIX)) {
                                data = cipher.decrypt(data.substring(CIPHER_PREFIX.length()));
                            }
                            paramMap.put(key, data);
                        } else {
                            paramMap.put(key, StringUtil.EMPTY);

                if (logger.isDebugEnabled()) {
                    logger.debug("Failed to decrypt {}", rolesStr, e);
                }
                return;
            }
        }

        if (logger.isDebugEnabled()) {
            logger.debug("role: original: {}, decrypto: {}", value, rolesStr);
        }

        if (valueSeparator.length() > 0) {

                Constants.CIPHER_PREFIX + ComponentUtil.getPrimaryCipher().encrypt(value));
    }

    default String getLdapAdminSecurityCredentials() {
        final String value = getSystemProperty(Constants.LDAP_ADMIN_SECURITY_CREDENTIALS);
        if (StringUtil.isNotBlank(value) && value.startsWith(Constants.CIPHER_PREFIX)) {
            return ComponentUtil.getPrimaryCipher().decrypt(value.substring(Constants.CIPHER_PREFIX.length()));
        }

- Decoupled `TaintManager` from `NodeLifeCycleController` (KEP-3902). ([#119208](https://github.com/kubernetes/kubernetes/pull/119208), [@atosatto](https://github.com/atosatto))
- Enabled traces for KMSv2 encrypt/decrypt operations. ([#121095](https://github.com/kubernetes/kubernetes/pull/121095), [@aramase](https://github.com/aramase))

        assertEquals(expect, ParameterUtil.encrypt(value));

        value = "";
        expect = "";
        assertEquals(expect, ParameterUtil.encrypt(value));

        value = "\n";
        expect = "";
        assertEquals(expect, ParameterUtil.encrypt(value));

        value = "=";
        expect = "unknown.1=";
        assertEquals(expect, ParameterUtil.encrypt(value));

        value = "=1\n=";

- Fixed a bug where kube-apiserver could emit a subsequent watch event even if the previous event failed to decrypt and was not emitted. ([#131020](https://github.com/kubernetes/kubernetes/pull/131020), [@wojtek-t](https://github.com/wojtek-t)) [SIG API Machinery and Etcd]

     *
     * @param userCode the raw user ID to encrypt
     * @return the encrypted and validated user code, or null if invalid
     */
    protected String createUserCodeFromUserId(String userCode) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final PrimaryCipher cipher = ComponentUtil.getPrimaryCipher();
        userCode = cipher.encrypt(userCode);
        if (fessConfig.isValidUserCode(userCode)) {