司(si)空在(zai)邮(you)(you)(you)(you)(you)(you)(you)(you)件(jian)(jian)加密(mi)(mi)功能(neng)模块(kuai)中(zhong)(zhong)，有(you)着(zhe)特(te)别之处(chu)，无论是(shi)企业(ye)邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)还(hai)是(shi)个(ge)人(ren)邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)都需(xu)要绑(bang)定(ding)(ding)对应邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)账(zhang)(zhang)(zhang)号。在(zai)应用(yong)中(zhong)(zhong)点击“我的(de)”，找到邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)设置(zhi)“添(tian)加账(zhang)(zhang)(zhang)户”字(zi)样(yang)按钮点击进入，可(ke)(ke)以(yi)看到页面显示出可(ke)(ke)绑(bang)定(ding)(ding)的(de)邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)有(you)：网(wang)(wang)易企业(ye)邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)、阿(a)里邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)、腾讯企业(ye)邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)、163网(wang)(wang)易邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)、126网(wang)(wang)易邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)、QQ邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)及其他邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)。选择对应的(de)邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)服务商，其中(zhong)(zhong)前(qian)面三个(ge)是(shi)企业(ye)邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)，后面三个(ge)是(shi)个(ge)人(ren)邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)。企业(ye)邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)设置(zhi)只需(xu)输(shu)入邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)账(zhang)(zhang)(zhang)号和邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)密(mi)(mi)码即可(ke)(ke)。个(ge)人(ren)邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)设置(zhi)需(xu)要输(shu)入邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)账(zhang)(zhang)(zhang)号和邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)授权码，输(shu)入完成后点击登录即可(ke)(ke)完成邮(you)(you)(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)绑(bang)定(ding)(ding)，聊天和邮(you)(you)(you)(you)(you)(you)(you)(you)件(jian)(jian)的(de)加密(mi)(mi)功能(neng)就可(ke)(ke)以(yi)正常使用(yong)了(le)。邮(you)(you)(you)(you)(you)(you)(you)(you)件(jian)(jian)加密(mi)(mi)可(ke)(ke)以(yi)确保邮(you)(you)(you)(you)(you)(you)(you)(you)件(jian)(jian)内(nei)容在(zai)传(chuan)输(shu)过程(cheng)中(zhong)(zhong)不被篡(cuan)改或窃取。用(yong)AES256给(ji)邮(you)(you)(you)(you)(you)(you)(you)(you)件(jian)(jian)加密(mi)(mi)文件(jian)(jian)格式(shi)

对(dui)(dui)称(cheng)加(jia)(jia)(jia)(jia)密(mi)(mi)(mi)(mi)的(de)(de)(de)(de)原理：为(wei)了保护(hu)用(yong)(yong)户(hu)的(de)(de)(de)(de)数(shu)(shu)(shu)据(ju)(ju)(ju)不(bu)被(bei)第(di)(di)三(san)双(shuang)(shuang)眼(yan)(yan)睛(jing)偷窥，需要将(jiang)(jiang)用(yong)(yong)户(hu)的(de)(de)(de)(de)数(shu)(shu)(shu)据(ju)(ju)(ju)在离开网(wang)卡(ka)之前(qian)加(jia)(jia)(jia)(jia)密(mi)(mi)(mi)(mi)处理，将(jiang)(jiang)用(yong)(yong)户(hu)的(de)(de)(de)(de)明(ming)(ming)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)数(shu)(shu)(shu)据(ju)(ju)(ju)加(jia)(jia)(jia)(jia)密(mi)(mi)(mi)(mi)成(cheng)(cheng)(cheng)密(mi)(mi)(mi)(mi)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)数(shu)(shu)(shu)据(ju)(ju)(ju)，密(mi)(mi)(mi)(mi)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)数(shu)(shu)(shu)据(ju)(ju)(ju)尽管还是(shi)0、1二进(jin)制流，但是(shi)这些二进(jin)制流，即(ji)使(shi)(shi)还原成(cheng)(cheng)(cheng)ASCII码，也(ye)是(shi)一(yi)堆毫(hao)无(wu)意义的(de)(de)(de)(de)字符串，毫(hao)无(wu)用(yong)(yong)处。上文(wen)(wen)(wen)(wen)(wen)(wen)(wen)提(ti)到了第(di)(di)三(san)双(shuang)(shuang)眼(yan)(yan)睛(jing)，那么前(qian)两双(shuang)(shuang)眼(yan)(yan)睛(jing)分(fen)别(bie)是(shi)谁呢？是(shi)明(ming)(ming)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)数(shu)(shu)(shu)据(ju)(ju)(ju)的(de)(de)(de)(de)发(fa)送者和密(mi)(mi)(mi)(mi)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)数(shu)(shu)(shu)据(ju)(ju)(ju)的(de)(de)(de)(de)接收(shou)者。由于(yu)接收(shou)者有(you)(you)密(mi)(mi)(mi)(mi)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)的(de)(de)(de)(de)解除(chu)加(jia)(jia)(jia)(jia)密(mi)(mi)(mi)(mi)密(mi)(mi)(mi)(mi)钥(yao)(yao)(yao)，可(ke)以(yi)将(jiang)(jiang)密(mi)(mi)(mi)(mi)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)还原成(cheng)(cheng)(cheng)明(ming)(ming)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)，被(bei)称(cheng)为(wei)阅读明(ming)(ming)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)数(shu)(shu)(shu)据(ju)(ju)(ju)的(de)(de)(de)(de)第(di)(di)二双(shuang)(shuang)眼(yan)(yan)睛(jing)。第(di)(di)三(san)双(shuang)(shuang)眼(yan)(yan)睛(jing)是(shi)谁？任何有(you)(you)机(ji)会(hui)(hui)看(kan)到、或(huo)捕获到密(mi)(mi)(mi)(mi)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)数(shu)(shu)(shu)据(ju)(ju)(ju)的(de)(de)(de)(de)人，都(dou)可(ke)以(yi)认为(wei)是(shi)第(di)(di)三(san)双(shuang)(shuang)眼(yan)(yan)睛(jing)。由于(yu)第(di)(di)三(san)双(shuang)(shuang)眼(yan)(yan)睛(jing)的(de)(de)(de)(de)人没(mei)有(you)(you)解除(chu)加(jia)(jia)(jia)(jia)密(mi)(mi)(mi)(mi)密(mi)(mi)(mi)(mi)钥(yao)(yao)(yao)，所以(yi)无(wu)法(fa)(fa)还原出(chu)明(ming)(ming)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)数(shu)(shu)(shu)据(ju)(ju)(ju)，自然就没(mei)法(fa)(fa)看(kan)明(ming)(ming)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)数(shu)(shu)(shu)据(ju)(ju)(ju)。在网(wang)络安(an)全(quan)领域(yu)，经常称(cheng)第(di)(di)三(san)双(shuang)(shuang)眼(yan)(yan)睛(jing)的(de)(de)(de)(de)人为(wei)第(di)(di)三(san)方。将(jiang)(jiang)明(ming)(ming)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)数(shu)(shu)(shu)据(ju)(ju)(ju)与加(jia)(jia)(jia)(jia)密(mi)(mi)(mi)(mi)密(mi)(mi)(mi)(mi)钥(yao)(yao)(yao)做一(yi)次(ci)加(jia)(jia)(jia)(jia)密(mi)(mi)(mi)(mi)操(cao)作(zuo)(zuo)，将(jiang)(jiang)密(mi)(mi)(mi)(mi)文(wen)(wen)(wen)(wen)(wen)(wen)(wen)数(shu)(shu)(shu)据(ju)(ju)(ju)与解除(chu)加(jia)(jia)(jia)(jia)密(mi)(mi)(mi)(mi)密(mi)(mi)(mi)(mi)钥(yao)(yao)(yao)做一(yi)次(ci)解除(chu)加(jia)(jia)(jia)(jia)密(mi)(mi)(mi)(mi)操(cao)作(zuo)(zuo)，由于(yu)加(jia)(jia)(jia)(jia)/操(cao)作(zuo)(zuo)方法(fa)(fa)完(wan)全(quan)一(yi)样(yang)，并且(qie)(qie)加(jia)(jia)(jia)(jia)/密(mi)(mi)(mi)(mi)钥(yao)(yao)(yao)也(ye)完(wan)全(quan)一(yi)样(yang)，故称(cheng)这种数(shu)(shu)(shu)据(ju)(ju)(ju)发(fa)送方、数(shu)(shu)(shu)据(ju)(ju)(ju)接收(shou)方共享会(hui)(hui)话(hua)密(mi)(mi)(mi)(mi)钥(yao)(yao)(yao)，并且(qie)(qie)共同使(shi)(shi)用(yong)(yong)会(hui)(hui)话(hua)密(mi)(mi)(mi)(mi)钥(yao)(yao)(yao)来完(wan)成(cheng)(cheng)(cheng)加(jia)(jia)(jia)(jia)/操(cao)作(zuo)(zuo)的(de)(de)(de)(de)方法(fa)(fa)为(wei)对(dui)(dui)称(cheng)加(jia)(jia)(jia)(jia)密(mi)(mi)(mi)(mi)。一(yi)次(ci)一(yi)密(mi)(mi)(mi)(mi)的(de)(de)(de)(de)邮件(jian)加(jia)(jia)(jia)(jia)密(mi)(mi)(mi)(mi)复杂吗一(yi)款好的(de)(de)(de)(de)邮件(jian)加(jia)(jia)(jia)(jia)密(mi)(mi)(mi)(mi)工具，不(bu)会(hui)(hui)改变用(yong)(yong)户(hu)对(dui)(dui)原有(you)(you)邮箱的(de)(de)(de)(de)使(shi)(shi)用(yong)(yong)习惯。

电(dian)子(zi)邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)系统包(bao)括(kuo)3个(ge)重(zhong)要的代(dai)(dai)理(li)，分别是(shi)：邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)用(yong)(yong)(yong)(yong)户代(dai)(dai)理(li)、邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)传(chuan)输(shu)代(dai)(dai)理(li)和邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)投递代(dai)(dai)理(li)。邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)用(yong)(yong)(yong)(yong)户代(dai)(dai)理(li)（MailUserAgent，简称MUA），用(yong)(yong)(yong)(yong)于(yu)编辑和发(fa)(fa)送(song)邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)，以及从服(fu)务器中(zhong)下(xia)载邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)、管(guan)理(li)邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)、阅读邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)等。邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)传(chuan)输(shu)代(dai)(dai)理(li)（MailTransferAgent，简称MTA），用(yong)(yong)(yong)(yong)于(yu)传(chuan)输(shu)、转(zhuan)发(fa)(fa)信(xin)件(jian)(jian)(jian)(jian)(jian)(jian)。此外，MTA也提供邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)存储功(gong)能。邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)投递代(dai)(dai)理(li)（MailDeliveryAgent，简称MDA），用(yong)(yong)(yong)(yong)于(yu)将(jiang)MTA发(fa)(fa)送(song)过(guo)来的邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)投递到(dao)(dao)收(shou)件(jian)(jian)(jian)(jian)(jian)(jian)人的邮(you)(you)(you)箱中(zhong)。在(zai)(zai)电(dian)子(zi)邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)传(chuan)输(shu)过(guo)程(cheng)中(zhong)，MUA接收(shou)用(yong)(yong)(yong)(yong)户投递的邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)，再(zai)(zai)将(jiang)邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)发(fa)(fa)送(song)给MTA。MTA接收(shou)到(dao)(dao)邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)之(zhi)(zhi)后(hou)，将(jiang)邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)发(fa)(fa)送(song)给其他中(zhong)转(zhuan)MTA，再(zai)(zai)发(fa)(fa)送(song)到(dao)(dao)收(shou)件(jian)(jian)(jian)(jian)(jian)(jian)方(fang)(fang)的MDA。MDA接收(shou)邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)之(zhi)(zhi)后(hou)，将(jiang)邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)发(fa)(fa)送(song)给收(shou)件(jian)(jian)(jian)(jian)(jian)(jian)方(fang)(fang)的MUA，收(shou)件(jian)(jian)(jian)(jian)(jian)(jian)方(fang)(fang)的MUA接收(shou)到(dao)(dao)邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)之(zhi)(zhi)后(hou)，投递给收(shou)件(jian)(jian)(jian)(jian)(jian)(jian)方(fang)(fang)。在(zai)(zai)这个(ge)传(chuan)输(shu)过(guo)程(cheng)中(zhong)呢，会用(yong)(yong)(yong)(yong)到(dao)(dao)多个(ge)电(dian)子(zi)邮(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)协(xie)议，常用(yong)(yong)(yong)(yong)的就是(shi)SMTP协(xie)议、POP3/IMAP协(xie)议。

《中华(hua)人民共和国数(shu)(shu)(shu)(shu)据(ju)(ju)安全法(fa)(fa)》于2021年(nian)(nian)6月10日通过，自2021年(nian)(nian)9月1日开始施(shi)行。其(qi)(qi)中“数(shu)(shu)(shu)(shu)据(ju)(ju)”二(er)字(zi)，指(zhi)的(de)是任何电子或其(qi)(qi)他方式对信息的(de)记(ji)录。国家保护(hu)个人、组织与数(shu)(shu)(shu)(shu)据(ju)(ju)有关的(de)权益(yi)，鼓励数(shu)(shu)(shu)(shu)据(ju)(ju)依法(fa)(fa)合(he)理有效(xiao)地利(li)用，保障数(shu)(shu)(shu)(shu)据(ju)(ju)依法(fa)(fa)有序(xu)自由流(liu)动，促进以(yi)数(shu)(shu)(shu)(shu)据(ju)(ju)为关键要素的(de)数(shu)(shu)(shu)(shu)字(zi)经(jing)济发展。司(si)空(kong)应(ying)用软件(jian)作为一款加密(mi)(mi)工(gong)具，设计(ji)初衷就是为了保护(hu)个人的(de)隐私及数(shu)(shu)(shu)(shu)据(ju)(ju)在第三方服务器的(de)安全，充分响(xiang)应(ying)了号召，为个人或企(qi)业数(shu)(shu)(shu)(shu)据(ju)(ju)安全保驾(jia)护(hu)航，贡(gong)献(xian)一份力量。司(si)空(kong)邮件(jian)加密(mi)(mi)功能使(shi)用的(de)加密(mi)(mi)密(mi)(mi)钥是“量子真随机(ji)密(mi)(mi)钥”。

在密(mi)(mi)(mi)(mi)(mi)(mi)(mi)码(ma)学中，分(fen)(fen)组(zu)(zu)加(jia)(jia)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)（英语：Block cipher），又被称(cheng)分(fen)(fen)块加(jia)(jia)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)或块密(mi)(mi)(mi)(mi)(mi)(mi)(mi)码(ma)，是(shi)(shi)一(yi)种对(dui)称(cheng)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)钥(yao)算(suan)法。它是(shi)(shi)将明文分(fen)(fen)成(cheng)多(duo)个等长(zhang)的(de)模块（block），再(zai)使(shi)用确定的(de)算(suan)法和(he)对(dui)称(cheng)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)钥(yao)对(dui)每组(zu)(zu)分(fen)(fen)别(bie)加(jia)(jia)/处理。分(fen)(fen)组(zu)(zu)加(jia)(jia)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)是(shi)(shi)极其重要的(de)加(jia)(jia)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)协议(yi)组(zu)(zu)成(cheng)，其中一(yi)条安全性原(yuan)则就是(shi)(shi)打乱密(mi)(mi)(mi)(mi)(mi)(mi)(mi)文、明文、密(mi)(mi)(mi)(mi)(mi)(mi)(mi)钥(yao)之间的(de)依(yi)赖(lai)关系,即(ji)使(shi)敌手获得密(mi)(mi)(mi)(mi)(mi)(mi)(mi)文和(he)明文的(de)统计规律，也(ye)无法求出(chu)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)钥(yao)，应用领域从电(dian)子邮(you)(you)件(jian)加(jia)(jia)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)到银行交易转帐，可(ke)以(yi)说(shuo)是(shi)(shi)非常(chang)之广。司空邮(you)(you)件(jian)加(jia)(jia)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)就是(shi)(shi)采(cai)用了这种对(dui)称(cheng)加(jia)(jia)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)的(de)方(fang)式(shi)。邮(you)(you)件(jian)加(jia)(jia)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)可(ke)以(yi)保护商(shang)业机密(mi)(mi)(mi)(mi)(mi)(mi)(mi)、个人隐私和(he)其他敏感信(xin)息。安卓邮(you)(you)件(jian)加(jia)(jia)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)工具

司(si)空基(ji)于电子邮箱的加(jia)密聊天功能使用更便(bian)捷。用AES256给邮件(jian)加(jia)密文件(jian)格式

轻(qing)松三步，开(kai)启司空之旅(lv)。注(zhu)册后(hou)(hou)(hou)领取(qu)体(ti)验会员，开(kai)启专属(shu)畅(chang)快体(ti)验；成(cheng)为会员后(hou)(hou)(hou)请先设(she)置盒子(zi)6位密(mi)码，进入(ru)后(hou)(hou)(hou)可(ke)(ke)以对(dui)本(ben)地文件(jian)(jian)进行加(jia)/操作，任意文件(jian)(jian)随心锁(suo)，存(cun)储分享安心放(fang)；解(jie)锁(suo)邮(you)(you)件(jian)(jian)加(jia)密(mi)功能(neng)，请先绑定电(dian)子(zi)邮(you)(you)箱(xiang)(xiang)(xiang)，可(ke)(ke)以是企业邮(you)(you)箱(xiang)(xiang)(xiang)，也可(ke)(ke)以是个(ge)人邮(you)(you)箱(xiang)(xiang)(xiang)，让信息安全流(liu)动。应邮(you)(you)箱(xiang)(xiang)(xiang)服务商要求(qiu)，个(ge)人邮(you)(you)箱(xiang)(xiang)(xiang)需使用授权码登录，授权码获取(qu)方(fang)法如(ru)下（以163邮(you)(you)箱(xiang)(xiang)(xiang)示例）：登录163邮(you)(you)箱(xiang)(xiang)(xiang)，进入(ru)设(she)置界面；点击(ji)IMAP/SMTP服务“开(kai)启”按(an)钮(niu)；“开(kai)启”后(hou)(hou)(hou)弹出窗口，点击(ji)“继续开(kai)启”；发(fa)送短(duan)信验证(zheng)，短(duan)信发(fa)送成(cheng)功后(hou)(hou)(hou)，点击(ji)“我已发(fa)送”；生成(cheng)授权码。用AES256给邮(you)(you)件(jian)(jian)加(jia)密(mi)文件(jian)(jian)格式

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