Hi:

I'm developing a web application and I'm trying to find a simple way to
encrypt and decrypt a password field. A one-way encryption won't work since
I need to be able to e-mail users their password if they loose it.

I have searched MSDN and there are obviously many VERY complex encryption
services available - I don't need certificates or PKI, Kerberos, etc - just
something simple:

* for example:

scrambledpassword = simpleencrypt(inpassword)

unscrambledpassword = simpledecrtyp(scrambledpassword)

Any help would be GREATLY apprecaited!

Thanks,

Fred

"Fred Nelson" <fred (AT) smartybird (DOT) com> wrote

cursory examination, it would (in Asymmetric mode) appear to do what you
want, albeit not quite as simply as your code example above.
If CryptoStream is over the top for you, you might consider developing your
own simple encryption algorithm. This would be enough to discourage curious
amateurs, but would do little to deter the "real" bad guys.

--
Peter - [MVP - .NET Academic]

Hi Fred,

When you do a bit Operation XOR function You will be
getting crypted text.
Here is a sample in VC.Hope it helps

Basic is PWd data + key -> encrypted pwd -->Crypt
encrypted pwd +key = clear pwd -->Decrypt

STDMETHODIMP CCryptography::CryptDecrypt(BSTR Datas, BSTR
Key, BSTR *retval)
{
AFX_MANAGE_STATE(AfxGetStaticModuleState())

int KEYLEN =0;
int DATALEN =0;
char *key=NULL;
char *data =NULL;

CComBSTR appenddata;

appenddata.Append(Key);
appenddata.Append(Key);

key = new char[wcslen(appenddata)];
::wcstombs(key,appenddata,wcslen(appenddata)+1);

data = new char[wcslen(Datas)];
::wcstombs(data,Datas,wcslen(Datas)+1);

KEYLEN = ::SysStringLen(Key);
KEYLEN = (KEYLEN *2);
DATALEN = ::SysStringLen(Datas);


int *B;
int *P;
long l =0;

B = new int[KEYLEN];
P = new int[DATALEN+1];

for(l=0;l<KEYLEN;l++)
{
B[l]= int(key[l]);

}

for(l=0;l<DATALEN;l++)
{
P[l]= int(data[l]);
if (P[l] >= 230)
P[l] = P[l] - 230;
}

int I;
for(I=0;I<DATALEN-1;I++)
{
int T;
T = P[i]^B[i];
if((T^B[i]) == P[i])
P[i] = T;
}
CComBSTR Crypt;
for(I=0;I<DATALEN;I++)
{
if( P[i] <= 21)
P[i] = P[i] + 230;
char str[1];
str[0]=char(P[i]);
str[1]=NULL;
Crypt.Append(str);
}
*retval = Crypt.Copy();
return S_OK;
}

Thanks
Chellam