Category Archives: encryption

Dropbox the encrypted online data storage with FBI access

Dropbox caught red handed

While Dropbox textually said on its website (now changed):

Dropbox employees aren’t able to access user files and when troubleshooting an account they only have access to file metadata’

They now admit in their Dropbox updated terms and conditions that they can and will decrypt your private files for law enforcement and textually say :

Dropbox will remove Dropbox’s encryption from the files before providing them to law enforcement

Is Dropbox lying to customers?

They have sent out an statement to the Business Insider saying that they are not lying because:

“…In our help article we state that Dropbox employees aren’t able to access user files. This is not an intentionally misleading statement — it is enforced by technical access controls on our backend storage infrastructure as well as strict policy prohibitions. The contents of a file will never be accessed by a Dropbox employee without the user’s permission…”

Dropbox can access AES256-bit encryption

This online data storage uses one of the strongest encryption algorithm out there, AES256, but because they hold the encryption keys it is perfectly possible for them to decrypt everything if needed.

There is nothing new with a company admitting that they will help out law enforcement if subpoenaed, what it is new is that they first tell you their employees can’t access the data and after they are caught red handed changing their terms and conditions they now say that it has all been a misunderstanding and they will change the wording on their site.

National Security Agency (NSA)
National Security Agency logo

Even if you were to live in cuckoo land and trust the authorities not to abuse their powers to access people’s data without a valid reason, you might want to read about Derek Newton’s article on Dropbox insecure design and Christopher Soghoian article on how Dropbox sacrifices users privacy for cost savings.

How to secure online data from eavesdropping

If you are going to store data online always encrypt it locally first in your computer, never trust a third party service like Dropbox or Hushmail with your data even if they tell you they can’t access it and that everything is fine, the bottom line here is that they have access to the decryption key.

Besides the chances of  encryption implementations being flawed by your online storage service, they can do anything they like with the decryption keys, if you send the data already encrypted to your online storage space you will be the only one who can decide when and how to decrypt your confidential files, you will also protect yourself from a rogue employee tempted to look at your confidential files.

PS: I am adding Dropbox to my shit list.

FBI asks for help breaking encryption code in murder case

The FBI is not trying to break the mighty PGP or Truecrypt, they have been trying to crack a home-brew encryption code and have not succeed, this can only indicate that they haven’t got that many means to break encryption as they like people to believe, being this a murder case one can assume that it is a high priority case and if after 12 years they are asking the public for help one can assume that they are at a dead end road.

Encrypted note FBI murder case
Encrypted note FBI murder case

The encrypted notes were written by the victim and it is the only clue to solve the murder, his family claims that he had used such encrypted notes since he was a boy, but no one in his family knows how to decipher the code. The American Cryptogram Association has been helping out in this case and unable to crack the code too.

FBI cryptanalysts are asking for other encrypted notes using the same code in order for them to compare and move their theories for cracking the code forward.


Analysis: Is there a backdoor in Truecrypt? Is Truecrypt a CIA honeypot?

Truecrypt domain registed with a false address

The domain name “” was originally registered to a false address (“NAVAS Station, Antarctica”), and was later concealed behind a Network Solutions private registration.

Truecrypt developers identity hidden

The TrueCrypt developers used the aliases “ennead” and “syncon”, but later replaced all references to these aliases on their website with “The TrueCrypt Foundation” in 2010. The TrueCrypt trademark was registered in the Czech Republic under name of “David Tesařík”.

Nobody knows anything about the developers, they do not want to identify themselves. Everyone likes to be known and congratulated for their great work, but apparently not Truecrypt developers, they do not care about the glory and honour and all that comes with it.

Truecrypt developers working for free

Closed source full disk encryption competitors like WinMagic, DriveCrypt (Securstar) and PGP Corporation have a full time team of software developers working in their products, creating such a product is not an easy feat as any of them will tell you.

Meanwhile two unpaid Truecrypt developers manage to work on Linux, MAC and Windows versions, on 32 and 64 versions and support the next Windows 7 as soon as it has been released, at the same time, presumably, these two Truecrypt developers also hold full time jobs that pays them a salary to feed their families and covers their mortgages .

Are closed source full disk encryption software developers overpaid lazy bastards and Truecrypt developers the finest, most hard working and charitable software developers on Earth?

Compiling Truecrypt source code increasingly difficult

Very few people compile the Windows binaries from source; it is exceedingly difficult to generate binaries from source that match the binaries provided by Truecrypt (due to compiler options, etc.)

This would be very convenient for a CIA mole, they are more likely to attack the software implementation other than the algorithm and the best way to do that is to insert some hard to find vulnerability during packaging. If someone else compiled the source code their plan would not work.

Truecrypt license contains distribution restrictions

Truecrypt is released under its own “Truecrypt license”, it is open source but it contains distribution and copyright-liability restrictions, most major Linux distributions do not want to know anything about it, Fedora has included TrueCrypt in its forbidden items list and forked it to RealCrypt instead.


UPDATE 2011: Truecrypt removed from The Amnesic Incognito Live system

The developers of the anonymous live CD called Tails have now decided to remove Truecrypt from their distribution claiming that development is done in a closed fashion, the licensing is restrictive and it is not being reviewed by too many people.


Truecrypt open source code has never been reviewed

Truecrypt’s source code has never been the subject of a thorough review, nor is there any reason to rely on the credentials of the developers, since they remain anonymous.

Good thorough code review and testing is hard, tedious and painstaking work, very few people have the skills to do it, and Truecrypt hasn’t been validated through a comprehensive review by any qualified cryptographer.

Censorship at Truecrypt forums

As per Truecrypt forum rule 3 you are not allowed to discuss about other encryption software, as per Truecrypt forum rule 8 you can’t discuss Truecrypt forks, as per Truecrypt forum rule 9 you can’t discuss software that decrypts Truecrypt.

You can’t say anything about their competitors and you are not even allowed to say anything about software that decrypts Truecrypt. If you post any criticisms or negative comments about their software, you will find that those posts will mysteriously disappear.

Truecrypt forum rules:

Can the FBI crack Truecrypt?

The CIA would never share their intelligence with their FBI puppies unless it is a real national security matter, terrorism, et al. And they would not want to kill the cow that produces their milk in a public trial where their capabilities are revealed.

Furthermore, there has been recently a case of a corrupt Brazilian banker who has escaped prosecution after the FBI failed to break his fully encrypted disk, he was using Truecrypt.


Given those news I do not believe the FBI can crack Truecrypt and unless your name is Bin Laden you are probably still safe with Truecrypt, even if it has a backdoor and the FBI seizes your computer.

Alternatives to Truecrypt forums

Computer security and privacy newsgroups such as , alt.privacy and alt.scramdisk

Computer and security internet forums such as Wilders Security Forums.

Alternatives to Truecrypt

The only free full disk encryption open source software that I have found and can rival Truecrypt is Diskcryptor.

Conclusion about Truecrypt reliability

Don’t get paranoid, even if you are using Truecrypt I could as well be wrong on my analysis and it is highly unlikely the CIA will ever come after you anyway.

Everyone has something to hide, but take it easy,you will need to trust some encryption product in the end and nobody out there knows 100% sure which one is safe, because what is safe today might not be tomorrow.

Just use the best encryption product according to your opinion and relax, there is no point in keeping in your head what could happen to you if you got it wrong, hopefully you did not, and as long as you did your best research on it, that is all that is needed.

For the record, I still recommend Truecrypt, they are my second choice of full disk encryption software after DiskCryptor. I am just raising what I believe are some fair points, because in security, you TRUST NOBODY.

German Privacy Foundation releases CryptoStick

The GPF Crypto Stick is a USB stick in a small form factor containing an integrated OpenPGP smart card to allow easy and high-secure encryption e.g. of e-mail or for authentication in network environments. As opposed to ordinary software solutions, private keys are always inside the Crypto Stick.

All cryptographic operations (decryption and signature because of public key cryptography) are executed on the PIN-protected Crypto Stick.

The GPF Crypto Stick is compatible with various software applications like GnuPG, Mozilla Thunderbird + Enigmail, OpenSSH, Linux PAM, OpenVPN and Mozilla Firefox and it works in Linux, Windows and MAC.

Crypto Key
Crypto Key

The Crypto Stick is developed as a non-profit open source project, between other things, the German Privacy Foundation runs various tor nodes, a mixmaster remailer and two i2P routers.

You can find more information about the CryptoStick at:

Unfortunately right now the online shop is only in German, if you are interested in purchasing a CryptoStick and do not understand German you can email: cryptostick @

Review: OpenPGP encryption software cGeep Pro v4.07a

By default e­mail is insecure, there are many risks to e­mail messages, unauthorized modification or viewing and sender impersonation of a message is something that Governments and crooks carry out on a daily basis.

PGP/GnuPG encryption of emails provides confidentiality and allows for digitally signing a message giving the recipient a method of verifying the identity of the sender as well as making sure the message has not been tampered with.

PGP encryption stopping spy agencies
Open PGP encryption stopping spy agencies

PGP/GnuPG solutions for securing e­mail are typically geeky which makes difficult widespread deployment to non technical people. There are some free utilities for Windows to be able to use PGP/GnuPG encryption, such as GPG4Win, Enigmail or FireGPG, but cGeep is by far the most user friendly OpenPGP software I have come accross.

I was glad to receive a free license from cGeep makers, Safelogic, to review its product and I am so pleased with their software that this is what I intend to use in the foreseeable future to encrypt all of my email messages.

cGeep PGP encryption interface
cGeep PGP encryption interface

Once installation is complete a cGeep wizard helps you to create your cGeep key pairs in just a few steps.

cGeep Pro ships with a plug-in for Outlook Office which offers total integration in the workflow of Outlook Office 2000/XP/2003/2007 users.

One click in Outlook is all you need to encrypt  and sign your emails and attachments, making this one of the easiest and most practical email encryption tools.

Through the Manage cGeep Keys window you can import a PGP key pair in .asc format directly and publish or retrieve a public key from any key server.

Encryption of email attachments of any format is possible, using asymmetrical or symmetrical keys with standard AES cryptography but you are not limited to email encryption, you can also use cGeep for file encryption before uploading it directly from cGeep to your FTP server.

This seems like a good feature for backing up sensitive files as it is the integrated file zipping feature.

The Good Stuff

Access to cGeep full source code is available for review, this is the best guarantee you can have against backdoors.

cGeep is based on OpenPGP, a non-proprietary protocol for encrypting email using public key cryptography, this makes cGeep broadly compatible and you can send encrypted files to people who use other OpenPGP software (PGP Corp, GnuPG, Hushmail, etc.)

Encryption can be done dragging a file and dropping it into the cGeep main window. It will also securely wipe files to make its recovery impossible and the software comes with different interchangeable skins/looks.

You can encrypt data and send it directly to an FTP server, you can also configure cGeep Pro to use a proxy for this.

Documentation is complete and comes in the form of a PDF file and tool tips, available in French as well as in English.

The Bad Stuff

There is no Linux or MAC version, cGeep email integration seems to be highly focused on Microsoft Outlook Office, leaving out dozens of other email clients.

Expert users may find cGeep lacks some customization in its options, for example you can not choose where to store the decrypted files and it will always place them in the same folder where the original files resides.

Although the data you upload to your FTP server is already encrypted, it would be good practise to let people use SFTP or FTP over SSL (FTPS), as FTP is a well known unsecure protocol that sends passwords in the clear.

Although not as simple to use, there are free OpenPGP encryption alternatives to cGeep.

cGeep file encryption interface
cGeep file encryption interface


cGeep is an excellent uncomplicated way to encrypt all of your emails, if you struggle to understand all the ins and outs of PGP encryption cGeep will guide you through all the process with easy to understand instructions and it specially integrates very well with Microsoft Outlook Office.

The fact that its source code is open to review adds peace of mind to those wary of backdoors.

If you can’t afford cGeep, you can still use some of the free email encryption alternatives mentioned above.

Visit cGeep OpenPGP Encryption


Review: Full disk encryption DiskCryptor v0.7.435.90

Most of you will have heard of Truecrypt, a free an open source hard disk encryption product, there are only another free and open source software for full disk encryption in Windows that I am aware of, DiskCryptor. You can download a 32bit or 64bit version of Diskcryptor depending on your OS.

I tested DiskCryptor using it for full disk encryption of my netbook, an Asus PC901 with a 12GB HDD divided in between two solid state disks of 8GB and 4GB. DiskCryptor is an ideal alternative to encrypt a netbook because netbooks do not have a CD drive and Truecrypt will force you to burn a CD to use system encryption, which DiskCryptor does not.

DiskCryptor cascade algortyhms
DiskCryptor cascade algortyhms

The first thing that impressed me of DiskCryptor is how small it is in size, a little over 500KB, but this comes at a price since the software manual does not come along and you get a link to their website instead.

I was pleased to see DiskCryptor offering a wide choice of encryption algorythms, AES-256, Twofish or Serpent algorithms in XTS mode, all of them seem to be pretty sound algorythms to me, and they can be used on cascade mode as well, VIA Padlock hardware accelaration for encryption and hashing is supported too.

The built-in benchmark shows the top speed with which cryptographic algorithms can perform, but I have to tell you that even on a netbook with a single core Intel Atom processor, regardless of the encryption algortyhm used I noticed no perfomance difference while using the netbook.

DiskCryptor encryption of partition
DiskCryptor encryption of partition

DiskCryptor allows wipe while encrypting, with three, seven or thirty five passes (Guttman method), but wiping a solid state disk like the one Asus Eee PC901 has is not safe, since solid state disks, like thumb drives, use wear levelling technology and the wiping passes are spread evenly accross the disk and not on the same sectors. If you are using a solid state disk, make sure it does not contain any confidential data that an electrons microscope could recover(very expensive to do right now), the only way to do this is by using a new disk, wiping it may fail to sanitize de disk.

With DiskCryptor you also can encrypt an ISO file and then burn it to CD-R/DVD/BD-R , after that you  will only be able to mount the image with DiskCryptor and the correct password/keyfile.

You can also set up a hot key to cause a blue screen of death, if you need to urgently shut down your computer when someone busts into your home unexpectedly this seems the way to go, it is quicker than clicking on the power off button.

The Good Stuff

DiskCryptor works with RAID volumes, you get a wide choice of algorythms, DiskCryptor is easy to use and unlike Truecrypt, it works on netbooks out of the box. DiskCryptor is open source, you can check for backdoors if you have the skills.

The software does not cost you any money, you can customize the boot loader widely, DiskCryptor boot loader customization is far better than Truecrypt, you can choose to install the bootloader on a CD/DVD, set up timeouts, choose if you want to use a QUERTY or DVORAK keyboard, and there is also a Windows live CD BartPE plugin for DiskCryptor.

The Bad Stuff

DiskCryptor should include some basic documentation at the very least, the GUI is easy to use and intuitive but encryption products need to come with instructions, a newbie could easily feel overwhelmed. DiskCriptor is only available for Windows, and there is no choice of hashing algorythms other than the default SHA-512.

There is also no choice of burning a recovery CD in case the boot loader gets corrupted (although you can backup the headers).

DiskCryptor password enter box
DiskCryptor password box


DiskCryptor is an excellent free and open source full disk encryption  alternative to Truecrypt, with a wide choice of encryption algorythms and easy to use, but they need to improve their poor documentation.

Their FAQ states that they are planning to implement a hidden OS in future versions, I think Diskcryptor looks promising and Truecrypt has a worthy competitor.

Video: Off-the-Record Messaging, privacy for IM

Off-the-Record is an open source plugin to use with Pidgin, an instant messenger software compatible with IRC, MSN, SILC, ICQ, Yahoo! and lots of other chat software that come with no privacy measures whatsoever.

Off-the-Record (OTR) Messaging allows you to have private conversations over instant messaging by providing encryption, authentication, deniability and perfect forward secrecy.

You can watch this Stanford University lecture video explaining how Off the record works and what it can do to help you keep your privacy and anonymity while chatting through instant messenger.

Off-the-Record Messaging