Encyrption in VB and Decryption in VB.NET

[VJ]

Hi,

I have to encryt a file in my vb application and pass that file over the
internet to my another web application that will decrypt the file. In dot
net we have many options for encryt/decrypt. Does any body have a code
written in VB which supports any of the .Net decryption.


Thanks

VJ

 

[Jim Wooley]

I have to encryt a file in my vb application and pass that file over the
internet to my another web application that will decrypt the file. In dot
net we have many options for encryt/decrypt. Does any body have a code
written in VB which supports any of the .Net decryption.

It is possible to consume .Net libraries from VB6. Is that an option in your
situation? You will need to sign your component and register it properly,
but you should be able to use it then.

Jim

 

[VJ]

Dear Jim,

I cannot install the dot net framework at client side, so this option wont
help.

thanks
VJ

 

[Jim Wooley]

How secure do you need the encryption? Would ROT13 work (see
http://en.wikipedia.org/wiki/ROT13). You should be able to do this or some
other simple encryption in VB6 fairly easily. You can get progressively more
secure, but you would probably need to get more intricate in your VB6 code.
Just how secure do you need?

The harder part would be secure key management. With any encryption scheme,
if you can get the key, you can usualy open the door. Since you are working
on multiple computers it sounds like the DPAPI is out.

Jim Wooley