保留格式加密的白皮书。保留格式加密可以解决相同格式的明文与密文之间的加密问题，适用于数据库字段的加密等。-Encrypted format to retain the White Paper. Encryption can be resolved to retain the same format as the format of the plaintext and ciphertext encryption between the applied field of encryption in

南瑞信通ET100安全芯片驱动程序，用于电压监测装置的GPRS通信协议-driver for ET100 security chip in the project of voltage monitoring