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do not use ANTI-DEBUGGING in their Encryption Products. I think his complaint that “a respected company like PGP Inc. He thinks that this is just a minor problem that he’ll be able to solve in the future, but it kind of misses the point: he hasn’t decrypted anything, he’s still actually at square 1.

Usb dumper for mac how to#

What he’s saying is that you can get access to the disk with any password you like… and funnily enough, it comes up with garbage when you decrypt it, because you used the wrong key, and all he’s shown how to do with a debugger is bypass the verification that you used the valid key to decrypt the disk. If the volume is NOT EMPTY, it can be mounted without the passphrase knowledge after patching the passphrase location BUT WHEN YOU CLICK THE DISK IT WILL SAY IT NEED TO BE FORMATTED. If the volume is EMPTY this will work just just by changing some bytes inside the. “PGP Virtual Disk can be mounted without the knowledge of the passphrase. Roy, the guy is an incompetent and his theory is spurious and based on a number of major misunderstandings about crypto. Opinions seem to vary, but the vector looks open to me. ” You should know that there is apparently a vulnerability for TrueCrypt and PGPDisk discussed (a little incoherently) at. What’s the betting you will find some quite interesting stuff from senior sales/marketing/accountants/directors of companies? So if you are a “Door Hop” at a hotel or valet service then you could just rip on spec all the USB devices you get and scan them when you get home. So what’s the beef about a program, you just loan somebody your keys to park your car etc and they can rip the contents of your USB stick on your key ring… These devices have been designed to quickly pull off (and in some cases display) all the photos from USB cameras, the ones I have seen appear to quite happily pull all the files on a USB Stick as well (some do all the digital cards as well). They run of batteries and fit quite comftably in your jacket pocket. IF you go and have a look at some of the small hand held devices for photograpers that will rip the contents of a USB camera or memory card/stick onto their local hard drive you might be a little supprised.

I get the feeling that there are no photographers reading this list…

In the case of WinZip, since version 9.0, c.

This tiny amount of known plaintext is often sufficient to complete the cryptanlysis of the early versions of pkzip encryption.

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However, an encrypted Zip file still reveals the names and types of files inside it, and this can often be sufficient to deduce the file headers.

Technically, it’s actually a known plaintext attack.

It can also encrypt existing Zip files, but doesn’t tell you which of the half dozen available methods is used. Explorer can handle some encrypted zip files, but I’m not sure which types.

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Because Windows XP includes Zip file support built into Explorer, many sites no longer install a Zip management utility. One thing you may want to test is Windows Explorer compatibility.

Of course, under the scenario you outline you will need a different password for each file, and of course the passwords themselves must be strong. More recent versions seem to be quite strong (they use AES in a respectable way) for a while, there were file compatibility issues between the various implementations (WinZip, PowerArchiver etc.) but if you have a recent version and choose a compatible encryption mode (an unfortunate point of confusion), you should do ok. So I guess even that activity is justified…Īug12:55 else able to comment on Winzip/PKzip encryption?Įarly versions were weak and could often be cryptanalysed from ciphertext alone.

One wonders if and when the TSA will try the same thing, as a data-mining and profiling technique, veiled as “protecting” us from terrorists.ĭrive imaging, searching for deleted data, is kinda like swabbing for drugs or explosive dust in an employee’s bag searching for what was there before.

I hate this fact, but the catch is, our company policies (as likely many others) already permit such activity through our “personal belongings brought onto company property are subject to search” policy.

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USBDumper is a neat little tool though – if only it would copy, plus sync, the data into a folder name which matches the USB drive’s volume name (instead of the current day/month/year), and also log activity somewhere on the machine so that it can be reported – then we’d be set. Written for auditing USB drive usage, it not only copies the contents of drives, it syncs future changes, and emails all file sync/copy activity to a central mailbox. USBDumper is nothing new, my employer had a program like this written up a couple years ago – which has been diligently working ever since.