return get(FessConfig.APP_CIPHER_ALGORITHM);
        }

        public String getAppCipherKey() {
            return get(FessConfig.APP_CIPHER_KEY);
        }

        public String getAppDigestAlgorithm() {
            return get(FessConfig.APP_DIGEST_ALGORITHM);
        }

        public String getAppEncryptPropertyPattern() {
            return get(FessConfig.APP_ENCRYPT_PROPERTY_PATTERN);