rainbow tables for 4chan tripcodes

avaliable, or otherwise?

dunno, Im drunk. Lol
.

lol, actually, that's not too bad of an idea.

I generated tables for up to four character tripcodes, takes about 300 MB... don't think I still have them, though.

You might be able to compute and store them. But why? It'd be a whole pile of gigabytes. Then you'd have to index them somehow, which would eat up yet more. Or store them in order for binary search... sorting several gigabytes of stuff should take a while.

I think it'd be quicker just to bruteforce them. Doesn't take that long... a week or so? Plus it's an embarrassingly parallel problem.

Using just A-Z, a-z, 0-9 and two more to pad out to 64 characters means (2^6)^8 = 2^48 tripcodes. Each one needs 12 bytes of storage if you sort them listed by hash (6 bytes if you keep them listed by password, but that makes for really slow searches), so 3072 terabytes. Using only lowercase a-z takes 2.3 terabytes, or a little bit less if you encode your data a bit more cleverly.

2  Name: Anonymous : 2007-12-31 23:57 
Anonymous : 2007-12-31 23:57 
2007-12-31 23:57 
23:57 
23:57

[b][o][u]23:57[/b][/o][/u]

>>6

Me thinks you don't understand rainbow tables

You use a set of reduction functions and chains of various lengths, and then only store the start and end of each chain.  This reduces your storage requirements by orders of magnitude at the cost of trivially small increases in lookup speed.  It is certainly feasible for someone to generate a table that covers the entire keyspace (2**56, the salt is not a salt and DES's key is 56 bits) and store within a reasonable limit.
It would not even take a large effort to do so.  An average computer can do 500k-1,000k per second, but a PS3 can do 14,000k.  2^56 / 14000000 / 3600 / 24 / 365 =  163 PS3s to do it in a year. I'm not sure why you would bother though as anyone willing to spend a few thousand can do an exhaustive search in three months(~$2,000) to 7 days (for only $12,000 almost a year ago now).  When it gets that fast why even bother with precomputation?

>>8
Easy, less heat.

>>9
less heat.
fag

>>6
You could also cut down on the space searched by considering that most people don't use many capital letters in tripcodes. That would make for a less than terabyte-scale storage requirement at the expense of not being quite comprehensive.

A distributed tripcode cracking service would be far more useful. But really, why the hell bother. They're just tripcodes, and secure tripcodes are implemented basically everywhere these days.

>>10
less heat.
fag
fag

>>12
less heat.
fag
fag
fag

>>13
> less heat.
fag
fag
fag
fag

>>14
> > less heat.
> fag
fag
fag
fag
fag

>>11
You forget that most tripcode users use "cute" tripcodes generated by some program. So you're still dealing with random characters in the end, []{}~&^ and the likes included.

I wants lots and lots of some delectable pot!

Marijuana MUST be legalized.

The rest of world4ch and 4chan Historically.

>>18
http://www.youtube.com/watch?v=CG4OLYnRpzs

22 Name: Anonymous 2011-01-31 20:39

<-- check em dubz