Linuxers April 2002

linuxers@mm.ilug-bom.org.in

85 participants
122 discussions

Re: [ILUG-BOM] Caveats with latest Yahoo Messenger
by Amish Mehta 04 Apr '02

04 Apr '02

Hi. Where did you find new YM for Linux? I couldnt find it at http://messenger.yahoo.com. I assume you meant official YM. Thanks. Amish. Philip S Tellis wrote: > >If any of you plan on using the latest yahoo messenger for linux,

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Re: Birthday attack against MD5
by Vinay Pai 04 Apr '02

04 Apr '02

> What about a birthday attack? a birthday attack seems to work against MD5 Doesn't help. A birthday attack means you can find two messages with the same hash (i.e. a collision). It doesn't enable you to find a second message with a particular hash value. To sum it up 1. To finda particular hash: Given H(m1) find m2 such that H(m2)=H(m1) If H is a cryptographic hashing function with n-bits this requires 2^n operations 2. To find a collision (birthday attack) Find m1 and m2 such that H(m1) = H(m2) This takes 2^(n/2) operations Thus for a birthday attack to be successful, you need control over BOTH the hashes. Thus it can be used to attack a digital signature scheme by producing a good message and a malicious message with the same hash (and thus same signature). It can't be used to recover passwords. Anyhow, even a birthday attack takes 213 days for our fantastic trillion-MD5-ops-per-second machine... definately doable by the NSA, CIA, KGB or something... but still not of much concern to most. A birthday attack is fairly easy to defeat in a digital signature scheme, plus if you're really paranoid you can use the 160-bit SHA algorithm instead.

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Re: [ILUG-BOM] [OT] How to use Usenet ?
by Tahir Hashmi 03 Apr '02

03 Apr '02

On Wed, 3 Apr 2002 17:55:29 Nikhil Joshi wrote: > >So how do I use Usenet? > http://groups.google.com VSNL News Server sucks big time! --- Tahir Hashmi (VSE, NCST) http://www.ncst.ernet.in/~tahir tahir AT ncst DOT ernet DOT in __________________________________ We, the rest of humanity, wish GNU luck and Godspeed See Dave Matthews Band live or win a signed guitar http://r.lycos.com/r/bmgfly_mail_dmb/http://win.ipromotions.com/lycos_02020…

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[OT] How to use Usenet ?
by Nikhil Joshi 03 Apr '02

03 Apr '02

I know this question does not belong here. Heck but I don't know anyone who uses Usenet.So plz bear with me. So how do I use Usenet? I've rough idea that you have to use ur ISP's server or something. I use Pine and my ISP is VSNL and MTNL Plz guide. P.S. If u think this is way off topic plz mail me at: nikhiljoshi(a)subdimension.com -- We should take pride in our mediocrity -- Calvin

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Re: [ILUG-BOM] Re: Brute force against MD5
by Nikhil D. Kikkeri 03 Apr '02

03 Apr '02

What about a birthday attack? a birthday attack seems to work against MD5 Nikhil >>>Random strings are harder to get, but still possible with a brute >>>force >>>approach (a cracker that tries every combination of n letters, digits >>>and special characters that exist). This however takes very long and >>>is >>>not feasible for most. >> >>"not feasible for most" is a gross understatement. >> >>The MD5 hash is 128 bits long. This means that there are >>340,282,366,920,938,463,463,374,607,431,768,211,456 values. This means >>that even if you could try a TRILLION combinations a second it would take >>you 10,790,283,070,806,014,188 years to break! >> >>A brute force attack against MD5 won't work. > > However a dictionary attack is much more likely to work against >this algorithm. That is not due to any weakness of the algo but due to >human tendency of picking works like "god" , "password" etc as passwords. >-- vinayak hegde > >_______________________________________________ >http://mm.ilug-bom.org.in/mailman/listinfo/linuxers > _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx

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Re: Re[2]: [ILUG-BOM] [HELP!]Do any body know how to convert TTF fonts from Wind
by Tahir Hashmi 03 Apr '02

03 Apr '02

On Tue, 2 Apr 2002 20:42:38 Vinay Pai wrote: > >There also is a font de-uglification HOWTO that might help. >http://www.linuxdoc.org > Yeah, but it's sick and somewhat out-dated. I had a tough time comprehending it until someone on a newsgroup pointed out the other one. The curious may try it out :-) --- Tahir Hashmi (VSE, NCST) http://www.ncst.ernet.in/~tahir tahir AT ncst DOT ernet DOT in __________________________________ We, the rest of humanity, wish GNU luck and Godspeed See Dave Matthews Band live or win a signed guitar http://r.lycos.com/r/bmgfly_mail_dmb/http://win.ipromotions.com/lycos_02020…

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TAB-TAB > log ?
by Nikhil Joshi 02 Apr '02

02 Apr '02

Been racking my brain on this one for long time. I use bash and I would like to have a file containing all the commands I can execute. Now when i press TAB-TAB at prompt it shows Display all 1710 possibilities? (y or n) now if i press y the whole list scrolls by and i can view only the last screen :( Is it possible to redirect the output to a file? -- "Who can fathom the feminine mind?" -Calvin "I like `em anyway" -Hobbes

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Re[2]: [ILUG-BOM] [HELP!]Do any body know how to convert TTF fonts from Windows to
by Vinay Pai 02 Apr '02

02 Apr '02

> sachin wrote: >>hi there >>i am not very confident about the conversion of the fonts >>from windows to the LINUX > > As Philip said, there's no need to convert the fonts. A step-by-step procedure for using Windows TT fonts is given here: > > http://home.c2i.net/dark/linux.html#ttf There also is a font de-uglification HOWTO that might help. http://www.linuxdoc.org

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Does ext3 get fragmented ?
by Nikhil Joshi 02 Apr '02

02 Apr '02

Hi! Just had power failure. hallelujah ! Now I can test ext3 :) During startup it asked whether it should perform file-system integrity test . I pressed y and after checking it showed something like this (0.5 % non-contiguous) Does this mean my file-system is fragmented? How do I defragment it? -- Miss Wormwood: What state do you live in? Calvin: Denial. Miss Wormwood: I don't suppose I can argue with that...

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HOW the Network thru Dialup is Posibble
by sachin 02 Apr '02

02 Apr '02

hi there i want to set up the network thru the dialup line and how can it be automated sachin -- ~=~=~=~=~=~=~=~=~=~=~=~=~=~= sachin(a)mediaibc.com MediaIBC ~=~=~=~=~=~=~=~=~=~=~=~=~=~= "Beware of programmers carrying screwdrivers." -- Chip Salzenberg ~=~=~=~=~=~=~=~=~=~=~=~=~=~=

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Linuxers April 2002