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简单的加密方法:XOR发表日期：2001-7-11
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念书的时候使用对数据进行加密的方法最简单的就是异或了，看到有人想要加密算法，就把以前的资料翻了一下，整理了一系列加密的函数，当然简单的加密也是容易破解的，但聊胜于无（记得把密要钥放好了），总比让人一打开数据库就看见密码明码好吧。:-)
<% '最简单的加密方法：XOR '---------------------- g_CryptThis = "中国-China" strFullKeyLen = Len(g_CryptThis) strFullKey = KeyGen(strFullKeyLen) Response.Write "<p>原始字符串: " & g_CryptThis & "<p>" Response.Write "<p>密钥: " & strFullKey & "<p>" Response.Write "<p>加密后: " & Server.URLEncode(EnCrypt(g_CryptThis)) & "<p>" Response.Write "<p>解密后: " & DeCrypt(EnCrypt(g_CryptThis)) & "<p>" '异或加密 Function EnCrypt(strCryptThis) Dim strChar, iKeyChar, iStringChar, i for i = 1 to Len(strCryptThis) iKeyChar = Asc(mid(strFullKey,i,1)) iStringChar = Asc(mid(strCryptThis,i,1)) iCryptChar = iKeyChar Xor iStringChar strEncrypted = strEncrypted & Chr(iCryptChar) next EnCrypt = strEncrypted End Function '异或解密 Function DeCrypt(strEncrypted) Dim strChar, iKeyChar, iStringChar, i for i = 1 to Len(strEncrypted) iKeyChar = (Asc(mid(strFullKey,i,1))) iStringChar = Asc(mid(strEncrypted,i,1)) iDeCryptChar = iKeyChar Xor iStringChar strDecrypted = strDecrypted & Chr(iDeCryptChar) next DeCrypt = strDecrypted End Function '产生指定长度的随机密钥 Function KeyGen(strlength) Dim i,UB Dim Temp Dim Poss Poss = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ" Temp = "" UB = Len(Poss) For i = 1 To strlength Randomize Temp = Temp & Mid(Poss,Int((UB - 0 + 1) * Rnd + 1),1) Next KeyGen = Temp End Function %> |
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