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date: Wed, 3 Oct 2007 20:04:07 +0800,    group: microsoft.public.dotnet.faqs        back       


password character   
Dear all,

I need to do the project and meet some difficulties and need your help.

I need to maintain the password security table.
I want to change the password to another characters and can recovered to be 
real password using some algorithms.

Do you have any algorithms of encrypt and decrypt?

Thanks for your help,

Mr. Hing
date: Wed, 3 Oct 2007 20:04:07 +0800   author:   Raymond Chiu

Re: password character   
Hello, Raymond!

.NET provides a set of cryptography algowithms.
Have a look at the followfing article
http://www.codeproject.com/useritems/Cryptography_MD5_TriDES.asp

--
With best regards, Vadym Stetsiak.
Blog: http://vadmyst.blogspot.com

You wrote  on Wed, 3 Oct 2007 20:04:07 +0800:

 RC> Dear all,

 RC> I need to do the project and meet some difficulties and need your
 RC> help.

 RC> I need to maintain the password security table.
 RC> I want to change the password to another characters and can
 RC> recovered to be  real password using some algorithms.

 RC> Do you have any algorithms of encrypt and decrypt?

 RC> Thanks for your help,

 RC> Mr. Hing
date: Wed, 3 Oct 2007 21:53:19 +0300   author:   Vadym Stetsiak

Re: password character   
Dear All,

I have used the algorithm given by vadym stetsiak in codeproject web site. 
It works fine but I meet the error in the following line of decrypt.

Dim resultArray As Byte() = cTransform.TransformFinalBlock(toEncryptArray, 
0, toEncryptArray.Length)


It always said that it is invalid length.
Even I change to be toEncryptArray.Length-1, it still does not work.

Please help,

Thansk,

Mr, Hing.
"Vadym Stetsiak"  ¼¶¼g©ó¶l¥ó·s»D:OZ3QF7eBIHA.1208@TK2MSFTNGP05.phx.gbl...
> Hello, Raymond!
>
> .NET provides a set of cryptography algowithms.
> Have a look at the followfing article
> http://www.codeproject.com/useritems/Cryptography_MD5_TriDES.asp
>
> --
> With best regards, Vadym Stetsiak.
> Blog: http://vadmyst.blogspot.com
>
> You wrote  on Wed, 3 Oct 2007 20:04:07 +0800:
>
> RC> Dear all,
>
> RC> I need to do the project and meet some difficulties and need your
> RC> help.
>
> RC> I need to maintain the password security table.
> RC> I want to change the password to another characters and can
> RC> recovered to be  real password using some algorithms.
>
> RC> Do you have any algorithms of encrypt and decrypt?
>
> RC> Thanks for your help,
>
> RC> Mr. Hing
>
>
>
date: Thu, 4 Oct 2007 11:12:28 +0800   author:   Raymond Chiu

Re: password character   
Hey,

I wrote a tutorial on how to use the cryptographic services in .NET to 
encrypt and decrypt files. But you can easily strip out the file code and 
just work with the password string:

http://www.geekpedia.com/tutorial227_Encrypting-and-Decrypting-Files-with-Csharp.html

Hope it helps.
Andrei

"Raymond Chiu"  wrote in message 
news:uApLoRjBIHA.5196@TK2MSFTNGP02.phx.gbl...
> Dear All,
>
> I have used the algorithm given by vadym stetsiak in codeproject web site. 
> It works fine but I meet the error in the following line of decrypt.
>
> Dim resultArray As Byte() = cTransform.TransformFinalBlock(toEncryptArray, 
> 0, toEncryptArray.Length)
>
>
> It always said that it is invalid length.
> Even I change to be toEncryptArray.Length-1, it still does not work.
>
> Please help,
>
> Thansk,
>
> Mr, Hing.
> "Vadym Stetsiak"  
> ¼¶¼g©ó¶l¥ó·s»D:OZ3QF7eBIHA.1208@TK2MSFTNGP05.phx.gbl...
>> Hello, Raymond!
>>
>> .NET provides a set of cryptography algowithms.
>> Have a look at the followfing article
>> http://www.codeproject.com/useritems/Cryptography_MD5_TriDES.asp
>>
>> --
>> With best regards, Vadym Stetsiak.
>> Blog: http://vadmyst.blogspot.com
>>
>> You wrote  on Wed, 3 Oct 2007 20:04:07 +0800:
>>
>> RC> Dear all,
>>
>> RC> I need to do the project and meet some difficulties and need your
>> RC> help.
>>
>> RC> I need to maintain the password security table.
>> RC> I want to change the password to another characters and can
>> RC> recovered to be  real password using some algorithms.
>>
>> RC> Do you have any algorithms of encrypt and decrypt?
>>
>> RC> Thanks for your help,
>>
>> RC> Mr. Hing
>>
>>
>>
>
>
date: Sat, 6 Oct 2007 11:20:15 -0400   author:   Andrew P.

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