ASP可逆算法

unction encrypt(ecode)
Dim texts
dim i
for i=1 to len(ecode)
texts=texts & chr(asc(mid(ecode,i,1))+i)
next
encrypt = texts
end function
function decrypt(dcode)
dim texts
dim i
for i=1 to len(dcode)
texts=texts & chr(asc(mid(dcode,i,1))-i)
next
decrypt=texts
end function
function mistake(preString)
Dim texts
Dim seed
Dim i,length
prestring = trim(preString)
length = len(preString)
seed = length
Randomize(length)
texts = ""
for i = 1 to length
seed = int(94*rnd(-asc(mid(preString,i,1))-seed*asc(right(prestring,1)))+32)
texts = texts & chr(seed) & chr(int(94*rnd(-seed)+32))
next
dim dist
dist=""
for i = 1 to len(texts)
if mid(texts,i,1)<>"@#" then
dist=dist+mid(texts,i,1)
end if
next
mistake = dist
end function

原文转自：http://www.ltesting.net