How PDA Defence works?

Hi,

I downloaded win ce 3.0 PDA Defence evalution software and installed in my
device. I would like to know the implementation logic of safe folder bcoz i
tried to look into the registry setting any FSD is assosiated to the safe
folder, but couldn't find any such entry.

I would be glad if someone tell me how the PDA Defence safe folder been
implemented.

rgds
GP.

Steve
Mon Jul 28 23:05:10 CDT 2003

Anyone who actually knows would, of course, be under NDA. However, if you
describe what it is and what it does. Perhaps someone here could theorize
how it might be implemented.

--
Steve Maillet (eMVP)
Entelechy Consulting
smaillet_AT_EntelechyConsulting_DOT_com

Steve
Tue Jul 29 07:12:55 CDT 2003

That link is to nothing but marketing noise. What is the actual
functionality you want to understand? You need to describe it in greater
technical detail then what the marketing speak does.

--
Steve Maillet (eMVP)
Entelechy Consulting
smaillet_AT_EntelechyConsulting_DOT_com

GnanaPrakash
Tue Jul 29 10:01:16 CDT 2003

Hi Steve,

Basically I want to create an application/driver that ll create a secure
folder/volume which ll do the mounting/unmounting of volume and any data
comes in/out in to volume has to be encrypted/decrypted using some
algorithm. I think this can be implemented by writing file system filter
driver and adding the corresponding registry entry to that folder key for
WIN CE 4.2, but the same has to implement on WIN CE 3.0. So i tried to look
into the PDA defence application for WIN CE 3.0 and could not able to find
how they might have implemented the logic...bcoz no registry entry for file
system and i came to know that they have written stream interface driver by
looking into dll code ( using disassembler ). Can u please help whether what
my understanding it right/wrong.

rgds
GP.


"Steve Maillet (eMVP)" <nospam1@EntelechyConsulting.com> wrote in message
news:u4FRWscVDHA.2224@TK2MSFTNGP09.phx.gbl...
> That link is to nothing but marketing noise. What is the actual
> functionality you want to understand? You need to describe it in greater
> technical detail then what the marketing speak does.
>
> --
> Steve Maillet (eMVP)
> Entelechy Consulting
> smaillet_AT_EntelechyConsulting_DOT_com
>
>

GnanaPrakash
Wed Jul 30 01:25:36 CDT 2003

Hi Steve,

Thanks a lot.

We are planning to go with the sample ramdisk block driver.

rgds
GP.

"Steve Maillet (eMVP)" <nospam1@EntelechyConsulting.com> wrote in message
news:e9SUhaeVDHA.2228@TK2MSFTNGP12.phx.gbl...
> The simplest approach would be to implement a block device driver in RAM -
> See the Platform Builder RAMDISK sample driver as a good starting point)
> then encrypt or decrypt each "sector" of data as it is read or written to
> the disk. No need for a filter driver or FSD as FATFS can handle the block
> device just fine. The other option is to use an underlying file for the
> storage instead of using ram and all sectors are read or written to a
memory
> mapped file. The disadvantage of this is that it is MUCH slower as the RAM
> file system will try and compress the data and you'd need to play some
games
> to make sure the full size of the disk was always available.
>
> --
> Steve Maillet (eMVP)
> Entelechy Consulting
> smaillet_AT_EntelechyConsulting_DOT_com
>
>