其實(shí)我也沒有想到要寫什么要寫的，但其實(shí)可以寫的有很多。

可以寫老師，不如

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科普：base64
Base64是網(wǎng)絡(luò)上最常見的用于傳輸8Bit字節(jié)碼的編碼方式之一，Base64就是一種基于64個(gè)可打印字符來(lái)表示二進(jìn)制數(shù)據(jù)的方法?？刹榭碦FC2045～RFC2049，上面有MIME的詳細(xì)規(guī)范。
Base64編碼是從二進(jìn)制到字符的過程，可用于在HTTP(一種協(xié)議)環(huán)境下傳遞較長(zhǎng)的標(biāo)識(shí)信息。采用Base64編碼具有不可讀性，需要解碼后才能閱讀。
好處：可以寫在代碼里，不用上傳cdn。
壞處：1.拖慢網(wǎng)頁(yè)訪問速度（特別是base64加密了很的的文件）。2.一個(gè)文件經(jīng)過base64加密后，體積大了差不多1/3。3.加密文件非常吃CPU（中央處理器）。
總結(jié)：小文件可以用，大文件算了吧，不如上傳IBM CLOUD，反正也不要錢。

解密后成了

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就先寫到這里吧，等我再研究一下再來(lái)寫過程分析。