日本SECOM公司研制成功一种传真保密器．可有效地防止传真失密。该保密器具有资料接收检查功能，它可为传真信号加密或解密。只有装上了它，传真机才能互相输出及输入文件，并将其还原为文字。如有一方未装就无法输出或输入文件。同时，在使用传真机时，必须先发出收件人的密码 Japan SECOM company successfully developed a fax confidential. Can effectively prevent the fax from being lost. The security device has a data reception check function, which encrypts or decrypts the fax signal. Only loaded it, fax machines can output each other and input files, and restore it to text. If one party is not installed can not output or input files. Also, when using a fax machine, you must first send out the recipient’s password