Comments on: Windows Mobile 6.1 – How do I encrypt my device?

By: How to enable Encryption of Windows Mobile device : Sysadmin Lab

How to enable Encryption of Windows Mobile device : Sysadmin Lab — Mon, 29 Mar 2010 13:53:56 +0000

[...] However, it seems like there’s a tool available to enable encryption called DojoCrypt. [...]

By: Andreas

Andreas — Thu, 17 Sep 2009 07:50:05 +0000

It makes no sense, but the OEMs do strange stuff in their Windows Mobile roms sometimes so I guess it’s possible

Thanks for the tip!

By: John

John — Tue, 15 Sep 2009 01:28:50 +0000

DojoCrypt and Exchange Encrypt policies were both breaking Wifi on my Treo 800w. But I fixed it.

In DojoCrypt, add exclusion for “\palmVol.vol”.
Then encrypt with Dojocrypt as normal.

The other hardware vendors (Samsung) probably have their own .vol file. Try excluding that in Dojocrypt, and see if it resolves the Wifi and other vendor-specific problems.

By: Andreas

Andreas — Fri, 31 Jul 2009 20:52:18 +0000

Do you still have the file?

I mean, a ROM upgrade will usually delete all files…

I do not know any devices that have official upgrades from WM 5 to WM 6.1. (And I can’t remember an HTC Touch with WM 5.)

My utility only works on WM 6.1 since that was when MSFT included encryption in the OS. (There are of course other third party apps that will let you encrypt WM 5 devices as well, and I don’t know what rules apply to those.)

So in short – I don’t think you can decrypt the file after a ROM upgrade.

By: toysouth

toysouth — Fri, 31 Jul 2009 17:29:33 +0000

On the same HTC touch mobile:
a file was encrypted with WM5 –> ROM upgraded to WM6.1; is it possible to decrypt the file?

By: Andreas

Andreas — Fri, 05 Jun 2009 13:44:27 +0000

It’s not registry based, and it’s not possible to post the xml directly here (it will be automatically mangled by the input validator).
However if you are familiar with xml provisioning you can find the necessary details here: http://msdn.microsoft.com/en-us/library/cc563008.aspx

I loaded up my debugger and stepped through the bits on an emulator using the host hard drive as a storage card, and I am able to reproduce the behaviour. (This is on a Windows Mobile 6.5 emulator, but it should be similar to your Touch HD with 6.1.) However as far as I can see the storage card is mounted with an attribute of temporary, and I’m guessing that might affect its willingness to be encrypted.

So far I unfortunately have no workaround.

By: Andrey

Andrey — Fri, 05 Jun 2009 10:39:09 +0000

Andreas, could you post registry keys and/or XML files that your utility change. May be I can do or check all change manually ?

By: Andreas

Andreas — Wed, 03 Jun 2009 21:39:19 +0000

I’ll have to step through the code tomorrow in debug mode to see if there might be a bug in there. I had some problems with memory cards initially, but I thought I had resolved those issues. Will look into it.

By: Andrey

Andrey — Wed, 03 Jun 2009 06:04:52 +0000

I try somthing and receive next results:

MicroSD card in my HTC is named as ‘microsd’
I created folder TEST and file TEST.txt on it.
When I add it to Inclusion \microsd\TEST\TEST.tst, and doing check, programm say TEST.txt: Unencrypted

When I by mistake write wrong file name in Inclusion (\microsd\test.txt – there is not such file) and Check this – program say test.txt – Encrypted

By: Andreas

Andreas — Tue, 02 Jun 2009 17:20:47 +0000

Not sure why that would happen. Only thing I can think of is that there’s something wrong with the path, and since there is no checking that the path is valid the file isn’t encrypted. Have you tried both with the “Browse”-button, and typing the folder/filename in manually? (If it works when specified manually there might be something wrong with the info I get from the filebrowser dialog.)

I have seen issues enumerating drives properly if there is both an internal HDD/memory card, and external storage, but I can’t remember the Touch HD having internal storage.