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About: Compression virus     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Virus106585816, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: yago:WikicatComputerVirusesyago:Abstraction100002137yago:Code106355894yago:CodingSystem106353757yago:Communication100033020yago:MalevolentProgram106573020yago:Program106568978yago:Writing106359877yago:WrittenCommunication106349220buildingyago:Software106566077yago:Virus106585816 New Facet based on Instances of this Class

A compression virus is an example of a benevolent computer virus, invented by Fred Cohen. It searches for an uninfected executable file, compresses the file and prepends itself to it. The virus can be described in pseudo code program compression-virus:={01234567;subroutine infect-executable:= {loop:file = get-random-executable-file; if first-line-of-file = 01234567 then goto loop; compress file; prepend compression-virus to file; }main-program:= {if ask-permission then infect-executable; uncompress the-rest-of-this-file into tmpfile; run tmpfile;}}