司空在郵(you)(you)(you)(you)(you)(you)件(jian)加(jia)密(mi)功(gong)能(neng)模塊中(zhong)，有著特別之處，無(wu)論(lun)是(shi)企(qi)業郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)還是(shi)個(ge)人(ren)郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)都(dou)需要綁定對應郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)賬(zhang)(zhang)號(hao)。在應用中(zhong)點(dian)擊(ji)“我(wo)的(de)”，找到郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)設置“添加(jia)賬(zhang)(zhang)戶”字樣按鈕點(dian)擊(ji)進入，可(ke)以看到頁面(mian)(mian)(mian)顯示出可(ke)綁定的(de)郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)有：網易企(qi)業郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)、阿里(li)郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)、騰(teng)訊(xun)企(qi)業郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)、163網易郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)、126網易郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)、QQ郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)及其他郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)。選擇對應的(de)郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)服(fu)務商，其中(zhong)前面(mian)(mian)(mian)三個(ge)是(shi)企(qi)業郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)，后面(mian)(mian)(mian)三個(ge)是(shi)個(ge)人(ren)郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)。企(qi)業郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)設置只需輸入郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)賬(zhang)(zhang)號(hao)和(he)郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)密(mi)碼即可(ke)。個(ge)人(ren)郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)設置需要輸入郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)賬(zhang)(zhang)號(hao)和(he)郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)授(shou)權碼，輸入完(wan)成后點(dian)擊(ji)登錄即可(ke)完(wan)成郵(you)(you)(you)(you)(you)(you)箱(xiang)(xiang)綁定，聊(liao)天和(he)郵(you)(you)(you)(you)(you)(you)件(jian)的(de)加(jia)密(mi)功(gong)能(neng)就可(ke)以正常(chang)使(shi)用了。郵(you)(you)(you)(you)(you)(you)件(jian)加(jia)密(mi)可(ke)以確保郵(you)(you)(you)(you)(you)(you)件(jian)內(nei)容在傳輸過程中(zhong)不(bu)被篡改或竊取。用AES256給(gei)郵(you)(you)(you)(you)(you)(you)件(jian)加(jia)密(mi)文件(jian)格式(shi)

對(dui)稱(cheng)加(jia)(jia)(jia)密(mi)(mi)(mi)(mi)的(de)原(yuan)(yuan)理(li)：為(wei)(wei)了(le)保護用(yong)戶的(de)數(shu)(shu)(shu)(shu)(shu)據(ju)不被第(di)三雙(shuang)眼(yan)(yan)睛(jing)偷(tou)窺(kui)，需要將(jiang)用(yong)戶的(de)數(shu)(shu)(shu)(shu)(shu)據(ju)在離(li)開網卡之(zhi)前加(jia)(jia)(jia)密(mi)(mi)(mi)(mi)處理(li)，將(jiang)用(yong)戶的(de)明(ming)(ming)文(wen)(wen)數(shu)(shu)(shu)(shu)(shu)據(ju)加(jia)(jia)(jia)密(mi)(mi)(mi)(mi)成密(mi)(mi)(mi)(mi)文(wen)(wen)數(shu)(shu)(shu)(shu)(shu)據(ju)，密(mi)(mi)(mi)(mi)文(wen)(wen)數(shu)(shu)(shu)(shu)(shu)據(ju)盡管(guan)還是0、1二進制流(liu)，但是這些二進制流(liu)，即使還原(yuan)(yuan)成ASCII碼(ma)，也是一堆(dui)毫(hao)無(wu)(wu)意義的(de)字符串，毫(hao)無(wu)(wu)用(yong)處。上文(wen)(wen)提到了(le)第(di)三雙(shuang)眼(yan)(yan)睛(jing)，那(nei)么(me)前兩雙(shuang)眼(yan)(yan)睛(jing)分別是誰呢？是明(ming)(ming)文(wen)(wen)數(shu)(shu)(shu)(shu)(shu)據(ju)的(de)發(fa)(fa)送者和(he)密(mi)(mi)(mi)(mi)文(wen)(wen)數(shu)(shu)(shu)(shu)(shu)據(ju)的(de)接(jie)(jie)(jie)收(shou)者。由于接(jie)(jie)(jie)收(shou)者有(you)密(mi)(mi)(mi)(mi)文(wen)(wen)的(de)解(jie)(jie)除(chu)加(jia)(jia)(jia)密(mi)(mi)(mi)(mi)密(mi)(mi)(mi)(mi)鑰(yao)(yao)，可(ke)以(yi)將(jiang)密(mi)(mi)(mi)(mi)文(wen)(wen)還原(yuan)(yuan)成明(ming)(ming)文(wen)(wen)，被稱(cheng)為(wei)(wei)閱(yue)讀明(ming)(ming)文(wen)(wen)數(shu)(shu)(shu)(shu)(shu)據(ju)的(de)第(di)二雙(shuang)眼(yan)(yan)睛(jing)。第(di)三雙(shuang)眼(yan)(yan)睛(jing)是誰？任何有(you)機會看到、或(huo)捕獲到密(mi)(mi)(mi)(mi)文(wen)(wen)數(shu)(shu)(shu)(shu)(shu)據(ju)的(de)人，都可(ke)以(yi)認為(wei)(wei)是第(di)三雙(shuang)眼(yan)(yan)睛(jing)。由于第(di)三雙(shuang)眼(yan)(yan)睛(jing)的(de)人沒有(you)解(jie)(jie)除(chu)加(jia)(jia)(jia)密(mi)(mi)(mi)(mi)密(mi)(mi)(mi)(mi)鑰(yao)(yao)，所(suo)以(yi)無(wu)(wu)法還原(yuan)(yuan)出明(ming)(ming)文(wen)(wen)數(shu)(shu)(shu)(shu)(shu)據(ju)，自然(ran)就沒法看明(ming)(ming)文(wen)(wen)數(shu)(shu)(shu)(shu)(shu)據(ju)。在網絡安全(quan)領域，經(jing)常稱(cheng)第(di)三雙(shuang)眼(yan)(yan)睛(jing)的(de)人為(wei)(wei)第(di)三方(fang)。將(jiang)明(ming)(ming)文(wen)(wen)數(shu)(shu)(shu)(shu)(shu)據(ju)與加(jia)(jia)(jia)密(mi)(mi)(mi)(mi)密(mi)(mi)(mi)(mi)鑰(yao)(yao)做(zuo)(zuo)一次(ci)加(jia)(jia)(jia)密(mi)(mi)(mi)(mi)操(cao)作，將(jiang)密(mi)(mi)(mi)(mi)文(wen)(wen)數(shu)(shu)(shu)(shu)(shu)據(ju)與解(jie)(jie)除(chu)加(jia)(jia)(jia)密(mi)(mi)(mi)(mi)密(mi)(mi)(mi)(mi)鑰(yao)(yao)做(zuo)(zuo)一次(ci)解(jie)(jie)除(chu)加(jia)(jia)(jia)密(mi)(mi)(mi)(mi)操(cao)作，由于加(jia)(jia)(jia)/操(cao)作方(fang)法完(wan)全(quan)一樣，并且加(jia)(jia)(jia)/密(mi)(mi)(mi)(mi)鑰(yao)(yao)也完(wan)全(quan)一樣，故稱(cheng)這種(zhong)數(shu)(shu)(shu)(shu)(shu)據(ju)發(fa)(fa)送方(fang)、數(shu)(shu)(shu)(shu)(shu)據(ju)接(jie)(jie)(jie)收(shou)方(fang)共享會話密(mi)(mi)(mi)(mi)鑰(yao)(yao)，并且共同使用(yong)會話密(mi)(mi)(mi)(mi)鑰(yao)(yao)來完(wan)成加(jia)(jia)(jia)/操(cao)作的(de)方(fang)法為(wei)(wei)對(dui)稱(cheng)加(jia)(jia)(jia)密(mi)(mi)(mi)(mi)。一次(ci)一密(mi)(mi)(mi)(mi)的(de)郵件(jian)加(jia)(jia)(jia)密(mi)(mi)(mi)(mi)復雜嗎一款(kuan)好的(de)郵件(jian)加(jia)(jia)(jia)密(mi)(mi)(mi)(mi)工具，不會改變用(yong)戶對(dui)原(yuan)(yuan)有(you)郵箱的(de)使用(yong)習慣。

電子郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)系(xi)統(tong)包括3個(ge)重要的(de)代(dai)(dai)(dai)理(li)(li)，分(fen)別是：郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)用戶(hu)(hu)代(dai)(dai)(dai)理(li)(li)、郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)傳(chuan)(chuan)(chuan)輸(shu)代(dai)(dai)(dai)理(li)(li)和郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)投(tou)遞(di)代(dai)(dai)(dai)理(li)(li)。郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)用戶(hu)(hu)代(dai)(dai)(dai)理(li)(li)（MailUserAgent，簡(jian)稱MUA），用于編(bian)輯和發(fa)(fa)(fa)送(song)郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)，以及(ji)從服務器中(zhong)下(xia)載郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)、管(guan)理(li)(li)郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)、閱(yue)讀(du)郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)等。郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)傳(chuan)(chuan)(chuan)輸(shu)代(dai)(dai)(dai)理(li)(li)（MailTransferAgent，簡(jian)稱MTA），用于傳(chuan)(chuan)(chuan)輸(shu)、轉發(fa)(fa)(fa)信件(jian)(jian)(jian)(jian)(jian)(jian)。此外，MTA也提供郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)存儲功(gong)能。郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)投(tou)遞(di)代(dai)(dai)(dai)理(li)(li)（MailDeliveryAgent，簡(jian)稱MDA），用于將MTA發(fa)(fa)(fa)送(song)過來的(de)郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)投(tou)遞(di)到收(shou)(shou)(shou)件(jian)(jian)(jian)(jian)(jian)(jian)人的(de)郵(you)(you)(you)(you)(you)(you)箱中(zhong)。在電子郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)傳(chuan)(chuan)(chuan)輸(shu)過程(cheng)中(zhong)，MUA接(jie)(jie)收(shou)(shou)(shou)用戶(hu)(hu)投(tou)遞(di)的(de)郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)，再將郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)發(fa)(fa)(fa)送(song)給MTA。MTA接(jie)(jie)收(shou)(shou)(shou)到郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)之(zhi)后(hou)，將郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)發(fa)(fa)(fa)送(song)給其(qi)他(ta)中(zhong)轉MTA，再發(fa)(fa)(fa)送(song)到收(shou)(shou)(shou)件(jian)(jian)(jian)(jian)(jian)(jian)方(fang)的(de)MDA。MDA接(jie)(jie)收(shou)(shou)(shou)郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)之(zhi)后(hou)，將郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)發(fa)(fa)(fa)送(song)給收(shou)(shou)(shou)件(jian)(jian)(jian)(jian)(jian)(jian)方(fang)的(de)MUA，收(shou)(shou)(shou)件(jian)(jian)(jian)(jian)(jian)(jian)方(fang)的(de)MUA接(jie)(jie)收(shou)(shou)(shou)到郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)之(zhi)后(hou)，投(tou)遞(di)給收(shou)(shou)(shou)件(jian)(jian)(jian)(jian)(jian)(jian)方(fang)。在這(zhe)個(ge)傳(chuan)(chuan)(chuan)輸(shu)過程(cheng)中(zhong)呢，會用到多個(ge)電子郵(you)(you)(you)(you)(you)(you)件(jian)(jian)(jian)(jian)(jian)(jian)協議(yi)，常用的(de)就是SMTP協議(yi)、POP3/IMAP協議(yi)。

《中華人(ren)民共和國數(shu)據(ju)安(an)全(quan)法(fa)(fa)》于(yu)2021年(nian)6月10日(ri)(ri)通過，自2021年(nian)9月1日(ri)(ri)開始施行。其中“數(shu)據(ju)”二字(zi)，指的是(shi)(shi)任(ren)何電子(zi)(zi)或其他方式對信息(xi)的記錄。國家保護個(ge)人(ren)、組織與數(shu)據(ju)有(you)關的權(quan)益，鼓(gu)勵數(shu)據(ju)依(yi)法(fa)(fa)合理有(you)效地利用，保障數(shu)據(ju)依(yi)法(fa)(fa)有(you)序(xu)自由流(liu)動，促進以數(shu)據(ju)為關鍵要素的數(shu)字(zi)經(jing)濟發(fa)展。司空(kong)應(ying)用軟件作為一款加密工具，設計初衷就是(shi)(shi)為了保護個(ge)人(ren)的隱私及數(shu)據(ju)在(zai)第三方服務器(qi)的安(an)全(quan)，充分響應(ying)了號召，為個(ge)人(ren)或企業數(shu)據(ju)安(an)全(quan)保駕護航，貢獻一份力量。司空(kong)郵件加密功能使用的加密密鑰是(shi)(shi)“量子(zi)(zi)真(zhen)隨機密鑰”。

在(zai)密(mi)(mi)(mi)(mi)碼(ma)學中(zhong)，分組加密(mi)(mi)(mi)(mi)（英(ying)語：Block cipher），又被稱分塊加密(mi)(mi)(mi)(mi)或(huo)塊密(mi)(mi)(mi)(mi)碼(ma)，是(shi)(shi)一(yi)種對(dui)稱密(mi)(mi)(mi)(mi)鑰(yao)算法(fa)。它是(shi)(shi)將明(ming)文(wen)分成(cheng)多(duo)個等長的模塊（block），再使用(yong)確(que)定的算法(fa)和(he)對(dui)稱密(mi)(mi)(mi)(mi)鑰(yao)對(dui)每組分別加/處(chu)理。分組加密(mi)(mi)(mi)(mi)是(shi)(shi)極(ji)其(qi)(qi)重要的加密(mi)(mi)(mi)(mi)協議組成(cheng)，其(qi)(qi)中(zhong)一(yi)條安全性原則就是(shi)(shi)打(da)亂密(mi)(mi)(mi)(mi)文(wen)、明(ming)文(wen)、密(mi)(mi)(mi)(mi)鑰(yao)之間的依賴關(guan)系,即使敵(di)手獲得密(mi)(mi)(mi)(mi)文(wen)和(he)明(ming)文(wen)的統計規(gui)律(lv)，也無法(fa)求(qiu)出密(mi)(mi)(mi)(mi)鑰(yao)，應用(yong)領域從(cong)電子郵件加密(mi)(mi)(mi)(mi)到銀行交易轉帳，可以說是(shi)(shi)非常之廣。司空郵件加密(mi)(mi)(mi)(mi)就是(shi)(shi)采用(yong)了這種對(dui)稱加密(mi)(mi)(mi)(mi)的方式。郵件加密(mi)(mi)(mi)(mi)可以保護(hu)商業(ye)機密(mi)(mi)(mi)(mi)、個人(ren)隱(yin)私和(he)其(qi)(qi)他敏(min)感信息。安卓郵件加密(mi)(mi)(mi)(mi)工具

司(si)空基于電(dian)子郵箱的加密(mi)聊天(tian)功(gong)能使用更便捷。用AES256給郵件(jian)(jian)加密(mi)文件(jian)(jian)格式

輕松三步，開啟司空(kong)之(zhi)旅。注(zhu)冊(ce)后(hou)領(ling)取體驗會(hui)(hui)員(yuan)，開啟專(zhuan)屬暢快體驗；成為會(hui)(hui)員(yuan)后(hou)請先(xian)設置(zhi)盒子6位密(mi)碼(ma)，進入后(hou)可(ke)以(yi)對本地文(wen)(wen)件(jian)進行加(jia)(jia)/操作，任意(yi)文(wen)(wen)件(jian)隨(sui)心鎖(suo)，存(cun)儲分享安心放；解鎖(suo)郵(you)件(jian)加(jia)(jia)密(mi)功(gong)能，請先(xian)綁定(ding)電子郵(you)箱(xiang)，可(ke)以(yi)是(shi)企業郵(you)箱(xiang)，也可(ke)以(yi)是(shi)個人郵(you)箱(xiang)，讓信息安全流動。應郵(you)箱(xiang)服(fu)(fu)務(wu)(wu)商(shang)要求，個人郵(you)箱(xiang)需使用(yong)授權碼(ma)登錄，授權碼(ma)獲取方法如下（以(yi)163郵(you)箱(xiang)示(shi)例）：登錄163郵(you)箱(xiang)，進入設置(zhi)界面；點擊IMAP/SMTP服(fu)(fu)務(wu)(wu)“開啟”按鈕；“開啟”后(hou)彈出窗(chuang)口，點擊“繼續開啟”；發(fa)送短信驗證，短信發(fa)送成功(gong)后(hou)，點擊“我已發(fa)送”；生成授權碼(ma)。用(yong)AES256給(gei)郵(you)件(jian)加(jia)(jia)密(mi)文(wen)(wen)件(jian)格式

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