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  3. A real source file shredder?

A real source file shredder?

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  • W wizardzz

    & wine....

    K Offline
    K Offline
    keyboard warrior
    wrote on last edited by
    #25

    i have found that wine only affects the last 12-15 hours of memory. :-\

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    • L Lost User

      And also fry all other electronics in the area. Good idea. Set off an EMP, I would suggest a high yield nuke outside the atmosphere right above your house, and your data will be safely erased.

      A while ago he asked me what he should have printed on my business cards. I said 'Wizard'. I read books which nobody else understand. Then I do something which nobody understands. After that the computer does something which nobody understands. When asked, I say things about the results which nobody understand. But everybody expects miracles from me on a regular basis. Looks to me like the classical definition of a wizard.

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      Chris Meech
      wrote on last edited by
      #26

      All true. Probably should have suggested an NNEMP[^] instead. :)

      Chris Meech I am Canadian. [heard in a local bar] In theory there is no difference between theory and practice. In practice there is. [Yogi Berra] posting about Crystal Reports here is like discussing gay marriage on a catholic church’s website.[Nishant Sivakumar]

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      • J Jun Du

        A recent source file delete program "Secure Delete .Net"[^] reminds me of a real source file shredder. What are reasonable requirements for a source shredder? To me, a couple of requirements are obvious 1) do not delete files but cut them into unrecognised pieces 2) cutting shall be random

        Best, Jun

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        Maximilien
        wrote on last edited by
        #27

        <conspiracy> all hd have double the advertised size and everything you write on it will be copied to a hidden partition ... and if you delete a file, multiple copied will be done , just in case. </conspiracy>

        Watched code never compiles.

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        • L Lost User

          Ahh, I have seen that show only a few times. It would have been clear if you had said that Spock could do this with his Tricorder and some logical deduction :)

          A while ago he asked me what he should have printed on my business cards. I said 'Wizard'. I read books which nobody else understand. Then I do something which nobody understands. After that the computer does something which nobody understands. When asked, I say things about the results which nobody understand. But everybody expects miracles from me on a regular basis. Looks to me like the classical definition of a wizard.

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          Tom Delany
          wrote on last edited by
          #28

          CDP1802 wrote:

          It would have been clear if you had said that Spock could do this with his Tricorder and some logical deduction

          But only after he constructed a "mnemonic memory circuit" from stone knives and bearskins... :-\

          WE ARE DYSLEXIC OF BORG. Refutance is systile. Your a$$ will be laminated. There are 10 kinds of people in the world: People who know binary and people who don't.

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          • J Jun Du

            A recent source file delete program "Secure Delete .Net"[^] reminds me of a real source file shredder. What are reasonable requirements for a source shredder? To me, a couple of requirements are obvious 1) do not delete files but cut them into unrecognised pieces 2) cutting shall be random

            Best, Jun

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            Tom Delany
            wrote on last edited by
            #29

            http://www.ameri-shred.com/equipment/industrial/hard-drive.html[^] That should work...

            WE ARE DYSLEXIC OF BORG. Refutance is systile. Your a$$ will be laminated. There are 10 kinds of people in the world: People who know binary and people who don't.

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            • J Jun Du

              A recent source file delete program "Secure Delete .Net"[^] reminds me of a real source file shredder. What are reasonable requirements for a source shredder? To me, a couple of requirements are obvious 1) do not delete files but cut them into unrecognised pieces 2) cutting shall be random

              Best, Jun

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              Rob Graham
              wrote on last edited by
              #30

              Windows indexing.

              "People who bite the hand that feeds them usually lick the boot that kicks them." Eric Hoffer

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              • T Tom Delany

                CDP1802 wrote:

                It would have been clear if you had said that Spock could do this with his Tricorder and some logical deduction

                But only after he constructed a "mnemonic memory circuit" from stone knives and bearskins... :-\

                WE ARE DYSLEXIC OF BORG. Refutance is systile. Your a$$ will be laminated. There are 10 kinds of people in the world: People who know binary and people who don't.

                L Offline
                L Offline
                Lost User
                wrote on last edited by
                #31

                Don't disturb him when he does that. Otherwise he might remove a multi-legged creature from your shoulder.

                A while ago he asked me what he should have printed on my business cards. I said 'Wizard'. I read books which nobody else understand. Then I do something which nobody understands. After that the computer does something which nobody understands. When asked, I say things about the results which nobody understand. But everybody expects miracles from me on a regular basis. Looks to me like the classical definition of a wizard.

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                • L Lost User

                  The magnetic 'shadows' of previous bits written can be measured and analyzed. For this the drive has to be taken apart in a clean room and the disks inside must be analyzed with sensitive equipment. That's quite expensive. Rewriting several times leaves little to be analyzed.

                  A while ago he asked me what he should have printed on my business cards. I said 'Wizard'. I read books which nobody else understand. Then I do something which nobody understands. After that the computer does something which nobody understands. When asked, I say things about the results which nobody understand. But everybody expects miracles from me on a regular basis. Looks to me like the classical definition of a wizard.

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                  Henry Minute
                  wrote on last edited by
                  #32

                  CDP1802 wrote:

                  Rewriting several times leaves little to be analyzed.

                  According to the Eraser[^] file shredder utility the US Govt standard is 35 passes. It isn't on the page I linked to above but I saw it in documentation for a previous version. [Edit] I've just noticed the url for the link above. If the choice was deliberate, if you know what I mean, it's very amusing. :) [/Edit]

                  Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus!

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                  • J Jun Du

                    A recent source file delete program "Secure Delete .Net"[^] reminds me of a real source file shredder. What are reasonable requirements for a source shredder? To me, a couple of requirements are obvious 1) do not delete files but cut them into unrecognised pieces 2) cutting shall be random

                    Best, Jun

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                    PIEBALDconsult
                    wrote on last edited by
                    #33

                    Here's an article I found a few years back. http://www.trouble.org/security/secure_del.html[^] Here's a copy: http://www.cs.auckland.ac.nz/~pgut001/pubs/secure_del.html[^] I wrote a C program that implements it. I never use it though, I just can't summon enough paranoia. Edit: I guess I should have tested the URL first, maybe it has ben deleted. :sigh:

                    modified on Thursday, January 20, 2011 11:56 PM

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                    • P Pete OHanlon

                      You can always just save it in SourceSafe. That'll shred it. Big time.

                      I'm not a stalker, I just know things. Oh by the way, you're out of milk.

                      Forgive your enemies - it messes with their heads

                      My blog | My articles | MoXAML PowerToys | Onyx

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                      peterchen
                      wrote on last edited by
                      #34

                      Quaint. We've been on VSS for about 7 or 8 years. Properly set up and used, data loss was not a problem.

                      FILETIME to time_t
                      | FoldWithUs! | sighist | WhoIncludes - Analyzing C++ include file hierarchy

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                      • L Lost User

                        Sorry for my ignorance. Who's Abby?

                        A while ago he asked me what he should have printed on my business cards. I said 'Wizard'. I read books which nobody else understand. Then I do something which nobody understands. After that the computer does something which nobody understands. When asked, I say things about the results which nobody understand. But everybody expects miracles from me on a regular basis. Looks to me like the classical definition of a wizard.

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                        edmurphy99
                        wrote on last edited by
                        #35

                        Gibbs is going to slap you

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                        • L LloydA111

                          Jun Du wrote:

                          What are reasonable requirements for a source shredder?

                          IMO, a program which will simply overwrite a file several times with random data, although I read once that it should be several dozen times to be 100% sure it's gone.


                          See if you can crack this: fb29a481781fe9b3fb8de57cda45fbef

                          The unofficial awesome history of Code Project's Bob! "People demand freedom of speech to make up for the freedom of thought which they avoid."

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                          F Offline
                          Fabio Franco
                          wrote on last edited by
                          #36

                          You just need to ovewrite once all the bytes with zeroes, unless you're afraid the data get's analyzed by specialized equipment and environment in the search for magnetic trces left behind. But I beleive that when that's is the case, it's usually because there is jail time in question if someone retrieves that information. So I think most here don't need to worry about that.

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                          • J Jun Du

                            A recent source file delete program "Secure Delete .Net"[^] reminds me of a real source file shredder. What are reasonable requirements for a source shredder? To me, a couple of requirements are obvious 1) do not delete files but cut them into unrecognised pieces 2) cutting shall be random

                            Best, Jun

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                            Dave Buhl
                            wrote on last edited by
                            #37

                            Additional thoughts, if you are talking about securely deleting source files from you development machine you also have to track any temporary file copies that your IDE makes and overwrite those drive locations as well. The problem there becomes that these temporary files would have to be tracked and erased from the start or you would have to have a good method of looking back through the file structure to see what is recoverable (like a file recovery tool does) and then overwrite them then. And I belive that Solid State Drives like thumb drives behave differently than standard spinning hard disk drives making the overwrite method not work as effectively but I can not find the reference to the article I read about that.

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                            • H Henry Minute

                              Abby[^] is the forensic scientist on the TV show NCIS[^]. As with all of these shows, they manage the impossible with ease.

                              Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus!

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                              DragonsRightWing
                              wrote on last edited by
                              #38

                              Henry Minute wrote:

                              As with all of these shows, they manage the impossible with ease.

                              Unlike the rest of the shows, however, Abby is cute as a button and irrepressibly lovable while doing it! ;)

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                              • D DragonsRightWing

                                Henry Minute wrote:

                                As with all of these shows, they manage the impossible with ease.

                                Unlike the rest of the shows, however, Abby is cute as a button and irrepressibly lovable while doing it! ;)

                                H Offline
                                H Offline
                                Henry Minute
                                wrote on last edited by
                                #39

                                DragonsRightWing wrote:

                                Abby is cute as a button and irrepressibly lovable while doing it

                                Oh yussss!

                                Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus!

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                                • J Jun Du

                                  A recent source file delete program "Secure Delete .Net"[^] reminds me of a real source file shredder. What are reasonable requirements for a source shredder? To me, a couple of requirements are obvious 1) do not delete files but cut them into unrecognised pieces 2) cutting shall be random

                                  Best, Jun

                                  D Offline
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                                  drummerboy0511
                                  wrote on last edited by
                                  #40

                                  It's kind of ironic that you'd bring this up... I was wondering a little bit about file shredding recently. So, from what I'm gathering on this thread, and from other places I've seen online, all that I'd really have to do to shred a file is overwrite it several times, or is there more to it?

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                                  • R ricmil42

                                    And if she can't, McGee can!

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                                    C Offline
                                    cvs26
                                    wrote on last edited by
                                    #41

                                    Recovering deleted files?... ...ELEMENTARY my dear watson!!

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