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Comon: Dansk firma får patent på harddisk-sletning



Nensome har udviklet en ny metode til sikker sletning af harddiske, som
skulle gøre det umuligt at rekonstruere slettede data. I stedet for at
overskrive disken et fast antal gange, skifter antallet af overskrivninger
hele tiden bytevis. Det skal forhindre, at en hacker kan rekonstruere data
ved at stille skarpt med skrivehovedet på et bestemt lag.

http://www.comon.dk/index.php/news/show/id=18630

Virksomhed:
http://www.nensome.dk/id38.htm

Ansøgning på verdenspatent:
http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=WO2004049317&F=0

Claims:
1. Procedure for the erasure of previously stored data on electronic data
storage media or data storage systems by repetitive writing of new
characters on top of the previously stored characters characterised by the
fact that the number of overwrites varies from byte to byte between a
minimum and a maximum.

. 2. Procedure for the erasure of previously stored data on electronic data
storage media according to requirement 1 characterised by the fact that the
number of overwrites of each byte is selected by a randomising program.

, 3 Procedure for the erasure of previously stored data on electronic data
storage media according to requirement 1 and requirement 2 characterised by
the fact that the administrator of the program selects the number of
overwrites.

. 4. Procedure for the erasure of previously stored data on electronic data
storage media or data storage systems by repetitive overwrites using new
characters on top of the previously stored characters according to
requirement 1 characterised by the fact that a random number generator is
being used for the selection of the characters to be used for each
individual overwrite.


Fra ovenstående lyder det som om virksomhedens opfindelse er:

dd if=/dev/random of=/dev/hda ;
dd if=/dev/random of=/dev/hda ;
dd if=/dev/random of=/dev/hda ;
dd if=/dev/random of=/dev/hda ;
dd if=/dev/random of=/dev/hda

Hvem kan skrive det kortest stykke shell script,
der krænker dette patent?

Er der nogle der kan finde den tidligste tidspunkt hvor
en kommando som ovenstående blev dokumenteret på nettet.
Google returnere 4200 hits på "dd random hda". Jeg kan
ikke finde patentet via http://onlineweb.dkpto.dk/pvsonline/Patent
men den er måske ikke helt uptodate.

Det syntes at være en ideal mulighed for at skrive en PM i
denne sag.

-- 
  Mvh. Carsten Svaneborg
http://www.softwarepatenter.dk


 
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