Crypt strings (again)

[Boris Nienke]

Hi,

i need to crypt some strings. These strings needs to be saved and read from
a (text?)file and sent via email (as attachment). Don't know if it relevant
but maybe there will be problems if the crypting would create Hex-00
values?

then i need a compatible crypting-code that runs in Delphi because the
backend of the application is written in Delphi. Here i need to open the
mail-attachment and decrypt the information.

Any solutions out there that are not too complicated to implement but are
strong enough to avoid easy hacking of the data?

Boris

 

[Ginny Caughey [MVP]]

Boris,

If you use the Windows Crypto API on both sides, shouldn't that work? You
can find .Net code that uses the Crypto API on www.opennetcf.org in the
Security section.

 

[Boris Nienke]

If you use the Windows Crypto API on both sides, shouldn't that work? You

is the API the same on WinCE and WinXP?

can find .Net code that uses the Crypto API on www.opennetcf.org in the
Security section.

i have found an overview of the security-procedures/functions but i have no
idea how to use them :'(

Boris

 

[Keith Welch]

Hi Boris,
Our crypto library includes controls for CF and .Net desktop, as well as
ActiveX controls for both desktop and devices. Depending on what you are
doing with Delphi, the desktop controls would probably work for you. There
are specific controls for encrypting to a file and decrypting from a file.
We have tested the compatibility going from device to Windows XP and 2000,
and back without problems. You can get more information at
http://www.mooseworkssoftware.com/crytpo.htm.
Keith Welch
Mooseworks Software

 

[Boris Nienke]

and back without problems. You can get more information at
http://www.mooseworkssoftware.com/crytpo.htm.

well... some good infos are missing
- What algorithms are supported?
- how strong is encryption? 128bit?

i will look a bit further for a fully included solution (personally i don't
really like OCX stuff because of the extra installation-problems that might
occur (currently i have a simple exe file - no need to register/install
anything) )

but thanks a lot - it may my last hope if i cannot find anything else

Boris

 

[Keith Welch]

The control uses the MS base provider and the RSA full provider type by
default. The keys are generated with and MD5 hashing algorithm. The
providers is a settable property, so any provider that is supported by the
device could be used. Hope this helps,
Keith Welch
Mooseworks Software