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Offlineearlyriser
Stranger

Registered: 05/02/01
Posts: 24
Last seen: 13 years, 9 months
Need FAST HD encryption advice
    #327850 - 05/28/01 03:07 PM (15 years, 6 months ago)

Gotta keep this short, but i just got busted and i need advice on hd encryption cause this thing may be searched. Im already downloading pgp freeware. Is there anything better that i should be using? Never used encryption software, any tips??



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InvisibleLanaM
Head Banana
Female

Registered: 10/28/99
Posts: 3,078
Loc: www.MycoSupply.com
Re: Need FAST HD encryption advice [Re: earlyriser]
    #328311 - 05/28/01 11:58 PM (15 years, 6 months ago)

PGP is good, use it and make sure you encrypt over 128-bit. Also, depending on your time factor. If you have the ability to, reformat your hard drive, reinstall the operating system, then reinstall PGP.

Now I'm not sure about the freeware version but I know the retail version has something called "PGPwipe". It will wipe all of the free space on your hard drive so that any info that may have been on it is difficult to recover.

It takes the magnetic arm of your hard drive and swipes over the free space. The nice thing is it will wipe over and and over, I think the D.O.D. number of wipes is 7?? One drawback is that it takes 2-3 hours to do 7 wipes of an 8 gig HD. Could take less or more time depending on how big your drive is.

Depending on who is going to be looking at it and your time frame.....If someone just bust down your door, restart the machine in DOS then type

format C:

or if you're at the C prompt

C:\format D: - or whatever drive you have and that will at least slow them down.

But then we can get into data recovery which is in itself interesting:)

Lana



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http://www.MycoSupply.com

The Premiere Source for Mushroom Growing Supplies.
Visit us online or call us toll free


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InvisibleLanaM
Head Banana
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Registered: 10/28/99
Posts: 3,078
Loc: www.MycoSupply.com
Re: Need FAST HD encryption advice [Re: earlyriser]
    #328329 - 05/29/01 12:28 AM (15 years, 6 months ago)

Just some info on swiping a HD. This page also gives links to where you can get software that will swipe your HD

http://www.stack.nl/~galactus/remailers/index-wipe.html

Security: File wiping
When you type 'del file' or 'rm file' to get rid of a file, it is in fact not deleted at all. Usually, all that happens is that the file's name is removed from the disk's index, but the data still remains on the disk itself. There are many undelete programs around which can easily recover this data. By overwriting the data with random junk, there is no way to recover it anymore.
More advanced techniques to recover lost data also exist. Overwriting data once is usually not good enough for these solutions. A popular standard states that you should overwrite three times with zeros and ones (zero-one-zero-one-zero-one over every byte), and then with random junk. This should even erase the magnetic remains of your data, which still can be detected after it has been overwritten once. Of course, you can overwrite with ones, zeros and random junk many times.

Another thing to consider is the file name, location and date/timestamps. Even if you can erase the data itself, the information about the file may still be availabe in system files somewhere, giving the attacker some information on the deleted files. Several of the programs below are capable of also erasing the filename and related information from the administration table.

Warning: This approach means that the program will write information directly to the administration table. If something goes wrong, it may corrupt this table. This may result in your entire hard disk becoming corrupt.

Note on logging filesystems
However, all of the observations made above about over-writing data in files can be made void by a modern file system, such as a log-structured file-system (LFS). LFS obtains its performance by refraining from seeking for blocks on the disk. Instead, new data is written into new blocks which is placed at the end of the log. This incures a security issue by leaving data on disk that was supposed to be overwritten. Many programs, PGP in particular, assumes that data can be physically overwritten through the file system (by overwriting the data in the file). Although no file system API guarantees that data will actually be overwritten, most systems will do so (assuming the file is not extended). In a LFS, this will almost certainly not be the case.

Lana





--------------------
Myco Supply - Distributors of Mycological Products
http://www.MycoSupply.com

The Premiere Source for Mushroom Growing Supplies.
Visit us online or call us toll free


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OfflinePhobos
Hawdcaw SingaExtraordinaire

Registered: 10/15/00
Posts: 413
Last seen: 6 years, 3 months
Re: Need FAST HD encryption advice [Re: earlyriser]
    #328352 - 05/29/01 12:47 AM (15 years, 6 months ago)

Melt your HD in hydrochloric acid. It will work like a charm!

(Your data will always physically be on your HD unless you destroy it.. All these programs, reformatting, etc, only work so well. If someone really wants the information, they're getting it unless the HD is wasted.)



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Offlinethem_26
enthusiast
Registered: 05/02/01
Posts: 204
Last seen: 14 years, 28 days
Re: Need FAST HD encryption advice [Re: earlyriser]
    #328823 - 05/29/01 04:02 PM (15 years, 6 months ago)

get the thing outta your humble abode. Then tell 'em to suck your Hard Dick!



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Offlinethem_26
enthusiast
Registered: 05/02/01
Posts: 204
Last seen: 14 years, 28 days
Re: Need FAST HD encryption advice [Re: earlyriser]
    #328824 - 05/29/01 04:02 PM (15 years, 6 months ago)

get the thing outta your humble abode. Then tell 'em to suck your Hard Dick!



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OfflineCowboyNeal
journeyman
Registered: 02/08/01
Posts: 29
Last seen: 15 years, 1 month
Re: Need FAST HD encryption advice [Re: earlyriser]
    #329698 - 05/30/01 03:11 PM (15 years, 6 months ago)

Hard drives are cheap. The best encryption device is a sledge hammer. If you're seriously looking at people examining your computer, IMMEDIATELY shut off the pc and smash the hell out of it. It's awfully cheap compared to the alternative.



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OfflineTheMilkMan
member
Registered: 07/25/00
Posts: 77
Loc: FLoorI.D.A.
Last seen: 15 years, 4 months
Re: Need FAST HD encryption advice [Re: earlyriser]
    #335750 - 06/06/01 01:43 AM (15 years, 6 months ago)

Go to the DOS prompt and type "format C:" (assuming that your C: drive is your hard drive) and then type y, when it asks you if your sure. you can always reinstall your softwhere and shit when everything blows over.



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OfflineAnnoA
Experimenter
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Registered: 06/18/99
Posts: 24,121
Loc: my room
Last seen: 2 months, 12 days
Re: Need FAST HD encryption advice [Re: TheMilkMan]
    #335947 - 06/06/01 09:07 AM (15 years, 6 months ago)

There are programs which can re-format a drive. This is not a good advice.


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