Re: pouzitelny desifrovac ZIP souboru

[Petr Zapadlo]

Zdravím,
pokud není cizí Linux, pak jsem si dnes přečetl:

http://www.root.cz/clanky/softwarova-sklizen-28-3-2012/
hledejte RarCrack (prej umí i zipy)

Zapik


> ------------ Původní zpráva ------------
> Od: Michal Lukac <michal.lukac na fstroj.uniza.sk>
> Předmět: Re: pouzitelny desifrovac ZIP souboru
> Datum: 28.3.2012 10:34:24
> ----------------------------------------
> >-----Original Message----- 
> >From: Michal Grunt
> >Sent: Wednesday, March 28, 2012 10:07 AM
> >To: HW-news
> >Subject: RE: pouzitelny desifrovac ZIP souboru
> 
> >Asi před deseti lety jsem také potreboval heslo do ZIP archivu a nasel jsem 
> >program, který na to nesel hrubou silou, ale stacilo mit na disku jeden 
> >soubor, který byl stejny jako v >archivu (většinou se něco najde pokud 
> >nejde zrovna jenom o dokumenty) a on to nejak porovnal a rovnou vypadlo 
> >heslo. Akorat nevim jak se to jmenovalo :-) Akorat je otázka, zda >je to 
> >pouzitelny na dnesni ZIP (ZIP64, UTF-8, ruzne druhy sifrovani...). Tak 
> >třeba patrat timto smerem.
> 
> 
> asi treba hladat "known plaintext"
> 
> napr: zip key to vie... ale je to dost stare..
> 
> New Zip Key decrypts most of WinZip archives in less than an hour with our 
> new SureZip™ Recovery
> All versions of WinZip and PKZip are supported
> Brute-Force, Xieve™, SureZip™, Known Plaintext or Dictionary attacks are 
> used to recover the password
> Additional user dictionaries support, case changes, multiple mistypes and 
> other modifications for each dictionary word
> 
> SureZip™ Recovery decrypts Zip archives created with WinZip version 8.0 and 
> earlier in less than an hour regardless of password used to protect it. At 
> least 5 encrypted files are required in order to process the archive. 
> Archives created with WinZip are supported.
> 
> Limitations
> Zip compression software uses relatively strong encryption algorithm that 
> makes instant password calculation (without knowing at least one file from 
> the archive) impossible. Brute-force attack is the slowest approach and can 
> test all the passwords of up to 8 characters. Xieve™ attack is much faster 
> and is capable of recovering passwords of up to 10 characters. Dictionary 
> attack is the fastest method - there's no limitation on password length. 
> Known Plaintext attack instantly decrypts an archive if there is at least 
> one file from the archive available unencrypted, regardless of the password 
> length.
> 
> M.
> 
> 
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>