Drag'n'Crypt ULTRA v2.3.9

webfork on 28 Feb 2017
  • 652KB (uncompressed)
  • Released on 20 Jan 2015
  • Suggested by Fluffy

Drag'n'Crypt ULTRA is a small file encryption tool that uses a handy "drop box" interface to make encryption and decryption fast and easy. Uses the Twofish encryption algorithm


  • File size is limited. Maximum file size depends on 1/2 free memory (for example: with a RAM of 512 MB RAM you can encrypt a 256 MB file). The author recommends TrueCrypt for larger files.
  • The website is in German, but the program is in English.
  • Starting from version 2.2.0, Drag'n'Crypt ULTRA is no longer backwards-compatible with data encrypted using Blowfish or TEA.

System Requirements: WinXP / Vista / Win7 / Win8
Writes settings to: Application folder
Stealth: ? Yes
Unicode support: No
License: Freeware
How to extract:
  1. Download the ZIP package and extract to a folder of your choice
  2. Optionally, delete unnecessary language files
  3. Launch DCU.exe
What's new?
  • Several minor bugs were fixed.

22 comments on Drag'n'Crypt ULTRA  The Portable Freeware Collection Latest Entries Feed

Raphael 2006-12-07 09:19

Wanna encrypt? Why not use your Portable Thunderbird version with enigma? I have a complete storage and database in a Thunderbird folder doing exactly that for me. Meaning this would just be overhead on my portable.

ronald 2008-03-09 08:03

For me, is really neccesary the encryption, not only the files too the folder what contain this files. when do that will be perfect.

Myself 2008-04-07 07:38

IMPORTANT INFO from the Drag'n'Crypt website for existing users.
"Starting from version 2.2.0 Drag'n'Crypt ULTRA is no longer downward-compatibly with data with the Blowfish or TEA the algorithm of the previous version was coded. Please decode before an update the data only with old version."

Queue 2008-04-09 11:03

Which was the last version before 2.2? 2.1 or 2.0? I though I remembered that version supporting TEA, Blowfish AND Twofish, and if so, is there a copy of it floating around anywhere?

Queue 2008-04-09 11:06

Ok, I'm dumb, at the DCU website, on the download page, follow the ''version history'' link. They have previous versions of DCU available for download.

Nerd 2008-10-30 18:41

This is an excellent file encryption program. Super fast and uses strong encryption, and it refuses weak passwords.

Littlepili 2009-03-17 06:23

This soft doesn't semms to be sure!
I recovered easilly the source file that was suposed to be securely deleted with DiskDigger

jernimo 2009-04-25 09:17

I´m using discryptor.net to encrypt my data. It is userfriendly and really fast.

gris 2013-10-30 08:29

The program was working alright, but after I moved it to a new folder, the context-menu encrypt/decrypt function failed to work. There was an error message that the dcu.dll was not in the same location as dcu.exe.

I deleted dcu.ini and started the app anew so a new version of dcu.ini would be created. The problem persisted, though.

Any suggestion to resolve the problem is appreciated.


I am Baas 2013-10-30 08:59

You need to disable/unselect the context menu option before you move it to a new location.


smaragdus 2013-12-07 00:43

This excellent tiny encryption tool has been updated to version 2.3.5- http://www.bitcore.de/dcu/history.html


Ganamyde 2013-12-09 07:34

And all went well until I tried to encrypt a large file, complete computer lock down.
Back to TrueCrype.


Mixture 2013-12-12 23:46

I read your computer's problem regarding DCU 2.3.5. So I tested my DCU 2.3.5 by encrypting a 129.992 MB PDF file. It encrypted just fine. I can only conclude that your computer doesn't function right. Good luck with TrueCrypt.


Craunch 2013-12-13 13:37

@Ganamyde Having been irritated by Mixture's response to your comment I decided to take a look at DCU myself.

I am using 64 bit Win7 pro running on an amd quad core processor with only 2GB memory. With this setup I was able to encrypt .zip and .exe files up to about 1 GB without any problems other than getting bored waiting for DCU to finish.

Trying to encrypt a 4GB .iso file caused DCU to report an address out of range error and the file was not encrypted.

Unfortunately I didn't have a file of about 2GB available to try. It would have been interesting to see what would have happened.

Monitoring DCU execution with Window's task manager, it looks like DCU reads the entire source file into memory before starting to encrypt it. I suspect that this behaviour contributed to your computer's lock-up, and could be made worse if windows started using its swap file to manage that memory. Given this behaviour I would recommend avoiding DCU and using TrueCrypt instead.

On further thing I noticed while doing the above tests was that DCU at one point tried to connect to the internet while it was encrypting a file. I have no idea why, and I see no valid reason for this suspicious behaviour.


webfork 2013-12-20 02:29

Craunch: thanks for testing, I hadn't used this program on anything larger than a few megs


Craunch 2013-12-20 11:15

You're welcome.

I downvoted this program because of its unexpected attempt to connect to the internet while encrypting - I don't trust security software that does things that I don't expect and for which there appears to be no explanation.


New_Order 2013-12-27 13:02

Thank you all for trying DCU.
DCU is concepted to encrypt smaller files. If you need to encrypt huge Files is Truecrypt the better solution. But if you need a program to protect your smaller files (your Documents and Pictures) and you need to use a 100% portable application than is DCU your tool.

The rule for the max. possible filesize is your RAM / 2 (for example your RAM is 4GB you can encrypt a file with max. 2GB size).

@Craunch: DCU do only using a connection to internet if you checking for newer Version, if you want to contact me, if you want visit the DCU Website / DCU at Facebook. DCU do not connect to internet if you encrypt or decrypt a file!!! DCU do not send any kind of informations back to me!!!

In the near future i plan to release DCU as Open Source. So everyone can take a look to the Source Code.
It's your decide to work with the program. But think about: DCU is 100% non commercial. I spend a lot of time for this project. You must not like/use DCU but please respect my work. And please excuse my bad english.


Craunch 2013-12-27 17:05

@New_Order: Anyone who can write encryption software has my respect. Anyone who offers their software for use by others at no cost has my thanks - Vielen dank!

The testing I was doing on DCU was to investigate Ganamyde's problem of complete computer lock-down when encrypting large files. Even though I tried encrypting files that were probably 100x bigger than DCU was intended to work with, I did not get lock-down. This is good because it shows that DCU can encrypt large files.

About half way through encrypting a 1GB file, I noticed that DCU was trying to trying to connect to the internet, and I blocked it. I was not expecting DCU to connect to the internet at all, and it seemed strange that it tried to do this while it was still encrypting a file. Unfortunately for you I am very sensitive to software that does the unexpected, and 2x as sensitive when the software is processing data that the user believes should be kept secure. That is why I marked DCU down.

I am now wondering if the internet connection could be the cause of Ganamyde's problem. I am guessing that you start a new thread to check for a new version of DCU. If the internet connection has to wait for data, that could cause the thread to lock up. This is not much of a problem with multiple processor cores, but if Ganamyde's computer was old enough to only have a single core it could cause his lock-down. Of course this is complete guesswork from me and is very likely wrong.


webfork 2013-12-28 19:14

New_Order: thanks, just verified that from text on the website. Entry has been edited.


New_Order 2013-12-31 13:29

@Craunch & @webfork: Thanks a lot!


s66901024 2015-01-23 01:07

@New_Oder: Any chance to support unicode ?


New_Order 2015-01-24 16:06

@s66901024: Sorry, not in the near future


Post your comment