Security 在散列之前对加密密码进行置乱。好主意？

我正在更新一个旧的经典ASP网站，我需要存储密码，所以考虑到经典ASP的局限性，我对如何进行这项工作自然有点过于谨慎

我同时使用salt和pepper（pepper是存储在服务器上的常量，而不是存储在数据库中），我只是想知道，在散列之前对“pepper+password+salt”字符串的字符进行洗牌/置乱有什么好处

我编写了一个函数，可以根据预定义的（秘密的）数字序列（序列也存储在服务器上，而不是数据库中）对任意长度的字符串进行置乱。因此，函数将始终返回相同的加扰值，而不是随机加扰值（这当然没有用）

我已经读了很多关于密码加密的书，但是我从来没有看到有人建议在哈希之前对加密的密码进行置乱。但对我来说，这似乎是一个非常额外的安全级别

只是想知道别人怎么想

下面是扰码函数（用VBscript编写）：

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如果有人访问了您的数据库，如果他们在同一台服务器上，他们也可以访问您的脚本。

SALT的目的是使rainbow表无效（因为攻击者必须为他们想要破解的每个哈希重新计算它们）。攻击者是否知道盐是无关紧要的。你的方法给你带来了什么好处？我理解salt的用途（它将存储在散列密码旁边）。如果数据库遭到破坏，黑客可以针对单个帐户，重建实现salt的彩虹表。我的想法是，扰乱密码+salt，而不是仅仅将两者连接起来，这几乎是不可能的，除非他们能够访问网站源代码和数据库。。。我也意识到这太过分了，但这似乎是一个很好的额外安全级别。重建彩虹表本质上与强制哈希相同。这是攻击者无论如何都可以做到的。谷歌的“科克霍夫原理”。假设攻击者知道密码和哈希的组合方式。不管怎样，你在问你现在做的是不是个好主意。我的回答是：“不，不是。”。你想怎么做就怎么做。我投票结束这个问题，因为它属于主题。

Function ScrambleSalt(the_str)

    '// Once you've joined the pepper + password + salt, you pass it through the "ScrambleSalt" function before 
    '// hashing. The "ScrambleSalt" function will scramble any string based on a pre-set sequence of numbers. 
    '// The sequence is imported from a txt file (kept in an offline folder, just like the pepper).

    '// The sequence needs to be an incremental collection of numbers (starting from 1) but in a random order 
    '// and comma delimited. Here's and example with 1 to 50, although the actual sequence uses 1 - 500:

    '// 22,8,21,45,49,42,3,36,11,47,19,9,15,23,40,16,29,31,43,38,44,4,41,13,35,26,17,14,10,28,6,5,34,12,39,1,
    '// 30,46,32,7,27,48,33,25,18,2,50,20,24,37

    '// (^ the numbers 1 to 50 in a random order)

    '// How the scrambling process works (using the above example sequence) is by rearranging the characters in 
    '// the string so that characters 22 appears first, followed by character 8, then character 21 etc, etc... 
    '// the function cycles through the sequence ignoring any numbers that are larger than the length of the 
    '// string until the characters in the string have all been rearranged (scrambled).

    '// If a string is more than 50 characters long, it will be split into individual strings, each containing 
    '// 50 characters (or a remainder in the case of the last string).

    '// So if the length of the string is 120 characters long, it will be split into 3 string:

    '// String 1 = 50 chars (chars 1 - 50)
    '// String 2 = 50 chars (chars 51 - 100)
    '// String 3 = 20 chars (chars 101 - 120)

    '// Each string will be scrambled, then joined back together before being returned by the function. 
    '// Using this method means the function can scramble strings of any length and without limit.

    Dim scramble_sequence, sequence_array, scramble_loop, in_loop_str, scrambled_str
    scramble_sequence = file_get_contents(request.ServerVariables("APPL_PHYSICAL_PATH") & "/../keys/scramble_sequence.txt")
    sequence_array = split(scramble_sequence,",")
    scramble_loop = Ceil(len(the_str),uBound(sequence_array)+1) '// round up
    for fx = 0 to scramble_loop-1
        in_loop_str = mid(the_str,fx*(uBound(sequence_array)+1)+1,uBound(sequence_array)+1)
        for fy = 0 to uBound(sequence_array)
            if int(sequence_array(fy)) =< len(in_loop_str) then
                scrambled_str = scrambled_str & mid(in_loop_str,int(sequence_array(fy)),1)
            end if
        next
    next
    ScrambleSalt = scrambled_str

End Function

function Ceil(dividend, divider) ' for rounding up a number
    if (dividend mod divider) = 0 Then
        Ceil = dividend / divider
    else
        Ceil = Int(dividend / divider) + 1
    end if
End function

function file_get_contents(file_path)
    Set fs = Server.CreateObject("Scripting.FileSystemObject")
    Set f = fs.OpenTextFile(file_path,1)
        file_get_contents = f.ReadAll
    f.Close : Set f = Nothing : Set fs = Nothing
end function

pepper value used for this example = "XC3Qpm7CNXauwAbX"
scramble sequence used for this example = "9,39,50,43,18,11,36,7,29,41,27,34,12,45,1,14,42,13,6,4,25,19,24,33,30,20,23,10,46,16,49,38,15,5,17,8,47,28,26,3,2,40,37,44,35,32,48,22,31,21"

password = "p@44w0rd"
salt = "G1sWNd0andiIhOYA"

concatenated pepper+password+salt:
XC3Qpm7CNXauwAbXp@44w0rdG1sWNd0andiIhOYA

scrambled using the example sequence:
NY@aI7NsduXAwmQG4dnd4rXXObppCW13CAhia00w

SHA512 Hash:
9d5a7781eeb815250c55c1a1f172c569b3b6167a48951c819e4982bea9b84bd8ecad6a417ff8f110541a1039ddf1fd8daa61a52a7c401fccae71dda77c607540