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View previous topic :: View next topic Making a salted md5 hash into a regular md5? Posted: Fri Jul 25, 2008 10:24 pm Urb4n Advanced user Joined: Apr 16, 2008 Posts: 55 is that possible in any way? I'm trying to set these hard to crack salted md5's into a cookie in order to login to a forum, thanks. Posted: Fri Jul 25, 2008 11:10 pm oniric Advanced user Joined: Jul 24, 2008 Posts: 65 Knowing the algorithm and the hash it is theoretically possible to calculate the MD5 only of the password but that would require an impressive cpu power or very very long time. For example if the algorithm is md5($salt.$password) calculating the "regular" md5 is exactly like cracking the salted one while instead in an algorithm such as the IPB2 one ( md5(md5($salt).md5($password)) ) one, knowing the salt, could calculate md5($salt) easily and the perform a search of the password in the md5 strings space ( 32 chars, 16 digits ): that's a huge key space! I hope that was clear enough Re: Making a salted md5 hash into a regular md5? Posted: Fri Jul 25, 2008 11:46 pm waraxe Site admin Joined: May 11, 2004 Posts: 2407 Location: Estonia, Tartu Urb4n wrote: is that possible in any way? I'm trying to set these hard to crack salted md5's into a cookie in order to login to a forum, thanks. Short answer: no Posted: Fri Jul 25, 2008 11:49 pm oniric Advanced user Joined: Jul 24, 2008 Posts: 65 LOL Making a salted md5 hash into a regular md5? www.waraxe.us Forum Index -> Hash related information You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT Page 1 of 1 All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 YearOldest FirstNewest First Select a forumSecurity Research by waraxe----------------General discussionHow to fixMetasploit relatedHash cracking requests----------------MD5 hashesAll other hashesHash related informationhttp://www.waraxe.us portal----------------SuggestionsCooperation proposalsSecurity bugs and issues in general----------------Newbies cornerSql injectionCross-site scripting aka XSSRemote file inclusionFull path disclosureShell commands injectionPhishing and Social EngineeringAll other security holesVarious software----------------PhpNukePostNukePhpBBXMB forumvBulletin BoardInvision Power Boarde107MamboJoomlaXOOPSM$ WindowsLinux worldAll other softwareCoppermine Photo GalleryProgramming languages----------------PhpMySqlPerlJavaJavascriptC and C++Visual BasicBorland Delphi and PascalPythonHTML and XMLAssemblerReverse engineering----------------Newbies cornerDisassemblingPHP script decode requestsMiscellaneous stuff----------------Future of the ITNanotechnologyFun cornerLinksTry2hack sitesProxy databaseDirect Downloads----------------ToolsTutorialsWordlistsRecycle Bin----------------Removed messagesOutdated posts Powered by phpBB © 2001-2008 phpBB Group

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