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hacker.org Forum Index
Search found 33 matches
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Topic: Blizzard
compudemon

Replies: 16
Views: 18249
PostForum: Challenges   Posted: Thu Sep 29, 2011 6:10 am   Subject: Blizzard
someone hinted there is no key, but if 1=a, 2=b, 3=c ... that is still a key of a sort even if a simple one. the binary data represented by the 2 color image, i double checked there is no 01 or fe int ...
Topic: Latin Lesson
compudemon

Replies: 10
Views: 13257
PostForum: Challenges   Posted: Mon Sep 19, 2011 1:15 am   Subject: Latin Lesson
the answer has two words with a space between
Topic: Redeye
compudemon

Replies: 3
Views: 4654
PostForum: Challenges   Posted: Mon Sep 19, 2011 12:11 am   Subject: Redeye
my one complaint is the file size of the image is a bit large, takes a while to download. this could easily be reduced by say, making it a gif with 50% width and height. it should still be readable.
Topic: Didactic Feedback Cipher Long 2
compudemon

Replies: 21
Views: 23883
PostForum: Challenges   Posted: Fri Sep 16, 2011 6:08 am   Subject: Didactic Feedback Cipher Long 2
the first 8 bytes is
5499fa99
am i correct in assessing that this translates to the 8 byte number
0x99fa9954 with 99 the most significant
brute force failed when assuming
it was 0x5499fa99
i wa ...
Topic: Broken XOR 3
compudemon

Replies: 16
Views: 14688
PostForum: Challenges   Posted: Thu Sep 15, 2011 7:13 pm   Subject: Broken XOR 3
i did not brute force adding 0s myself but i think it can be done. you could take say the first 10 hex digits and just brute force all the x b and add 0 combos on that rather then the whole thing. you ...
Topic: Code optimization
compudemon

Replies: 57
Views: 63711
PostForum: Crossflip   Posted: Tue Sep 06, 2011 11:34 pm   Subject: Code optimization
guassian would be N^2 time with packed bools if each row could fit into an int. naturally its still an N^3 problem just done parallel. Am I correct in guessing that some form of algebra, letting the h ...
Topic: Code optimization
compudemon

Replies: 57
Views: 63711
PostForum: Crossflip   Posted: Sat Sep 03, 2011 7:13 pm   Subject: find it and learn it v.s. make your own

so i converted all my code to c++
created my own classes for bigints, stringbuffer, stringbufferarray
as any true hacker might do

I'm not sure why anyone would want to write such classes from s ...
Topic: Code optimization
compudemon

Replies: 57
Views: 63711
PostForum: Crossflip   Posted: Sat Sep 03, 2011 1:58 am   Subject: Code optimization
Java is slow
C++ is full of memory pointer hassles

so i converted all my code to c++
created my own classes for bigints, stringbuffer, stringbufferarray
as any true hacker might do
since i have ...
Topic: Code optimization
compudemon

Replies: 57
Views: 63711
PostForum: Crossflip   Posted: Sun Aug 28, 2011 1:26 am   Subject: Code optimization
i switched over my code to use BigInteger seems to have cut my memory use by a factor of 16 for now but it should improve as the memory needed for the matrix itself grows compared to other variables. ...
Topic: Stuck at level 91? (Server fault?)
compudemon

Replies: 30
Views: 30138
PostForum: Crossflip   Posted: Sat Aug 27, 2011 11:29 pm   Subject: Stuck at level 91? (Server fault?)
i got stuck at 91 too, then i changed my code to use post rather then get

private void go() throws Exception {
URL u;
BufferedReader rd;
String enc="UTF-8";
u = ...
Topic: Breakout / Breakout Extreme
compudemon

Replies: 24
Views: 29908
PostForum: Challenges   Posted: Thu Aug 25, 2011 6:01 am   Subject: Breakout / Breakout Extreme
it keeps losing the ball off screen and its not playable after. i got really far too Sad
Topic: Big Fib
compudemon

Replies: 36
Views: 30357
PostForum: Challenges   Posted: Thu Aug 18, 2011 7:11 pm   Subject: Big Fib
lucky for me i got it on the first try, it does not help that the web does not agree weather it is

1,1,2,3,5
0,1,1,2,3,5

or if the first in the sequence would be 0 or 1

so here is a hint

...
Topic: Didactic XOR Long Cipher
compudemon

Replies: 16
Views: 16579
PostForum: Challenges   Posted: Mon Aug 15, 2011 10:23 pm   Subject: smart brute force
rather then incrementing the key i used

p=p%4
if p==0 : a=((key&0xff)+1)&0xff; b=key&0xffffff00; key=a+b
elif p==1 : a=((key&0xff00)+0x100)&0xff00; b=key&0xffff00ff; key=a ...
Topic: Didactic XOR Cipher 3
compudemon

Replies: 35
Views: 34041
PostForum: Challenges   Posted: Mon Aug 15, 2011 7:45 am   Subject: brute force solved it
all i did was code a simple thing in python that cycled through all possible b x pairs
256x256 in total then simply culled out the strings that contained a char outside the 32 - 126 printable range o ...
Topic: submission with POST
compudemon

Replies: 5
Views: 13828
PostForum: General Puzzles   Posted: Sun Aug 14, 2011 2:12 am   Subject: after many trys i got post method working
this is the solution posting section of the solver code in Java. it should be easy to adapt this to any game here, just change the url address and the writer.write line with '&' separated key/val ...
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