Encryption Cracking Contest

vasanth · 04-13-2002, 11:33 PM

Hi all,
I have created a simple encryption program.. Based on the vigenere algorithm. Well i have attached the program below but without the source.. You guys can encrypt any text and decrypt any text with that...

Now the contest is that i have given below the necrypted string you have to find out what it means.. Lets see if there is any crypto geius here...

The encrypted text is

X HSMT Y GGCCVRBAERX OJH IVEW HWPI XG XYT XIJI

So tell me what the above means... If you need more cipher text make you own with my encrypting and decrypting program attached below..
If you require any help or hint post here.. I will help

blackwyvern · 04-14-2002, 12:55 AM

Myabe I am doing something wrong, but if I type anything in the console its says finished and closes... when I start the program it automatically starts up with improper use.

vasanth · 04-14-2002, 01:28 AM

To open the encryption program first you have to go to dos prompt.

From there you have to open the file
encdec -enc to encrypt a given text and encdec -dec to decrypt a given text. For both you need to provide a key or a password..

Try this and tell me if you have more prolems. I want to see who can break my encryption program...

fyodor · 04-14-2002, 02:19 AM

im feeling lazy...give us some more ciphertext, its rather impractical to expect us to produce our own considering we do not know the key you used...100 or so characters

vasanth · 04-14-2002, 02:39 AM

Ok here is more cipher text you asked for

WW ECA IC COII XG ZRHOJXY W ARH PLV CJI LVK GGCCVRBSZ KWWO VCQNCGIWKR EFKKVPA XY XG MJ HDI TLPVR HABK MKY PGGIU TKV XYJSN HDEK WP ZH RIIN AEJN PS RFWGB HDMJ SJGI
NDPMFC OMERS MK WO MTFU SPGEG TJAR P YLZAR GRC XVVPY MK PQX X DEMT ISIT LPRCG XF PQMCS OXFDBCII SJGINDPMFC LVFVFWQJ WJ KWS JLIINI

Ok i think this would do. The key i have used is really very simple. So i think even if you use brute force you should be able to break it within hours.. But brute fore is not the answer because it is childish.. But lets see who can break this first...

The first person to break this i agree is a good cryptographer.....

shtarker · 04-14-2002, 06:29 AM

That encryption algorithm wouldn't be in any way similar to the one you posted a few threads back now would it?

vasanth · 04-14-2002, 07:01 AM

Well it is almost the same but still differs a lot in may of the other ways.......
If you encrypt the text in the one i posted before and in the new program i crated.. the output will be completely different.. But the logic of my new program is similar.. SO i have given you guys another clue..

Has any one atleast come up with something so far...

ErionD · 04-14-2002, 08:18 AM

nope =P
Perhaps its too good so that we can't solve it!
Run away and make a fortune in the encryption business i say!

vasanth · 04-14-2002, 08:46 AM

Hey dont make fun of my prog... I am sure you dint even try.. Please try... Because i want to find the loop holes in it....
I will post the source in the next 2 days if any one here asks for it

Thanks
Vasanth

vasanth · 04-14-2002, 10:06 AM

There has been 112 views and just a few posts... Shall i post the soure and the key of the above ciphertext here.

Quantrizi · 04-14-2002, 10:36 AM

Dude, he really wasn't making fun of it.....just being a smart***

vasanth · 04-14-2002, 10:40 AM

So do you guys mean that it is now time for me to post the key and the source of my program..

blackwyvern · 04-14-2002, 12:11 PM

I tried, but it seems you used a multi-letter key, which does make it difficult for us to solve. Im sure if you took this to a real cryptography site, then you may receieve a lot more help on your project. PS. Im not putting you down at all, I say great job =)

Inquirer · 04-14-2002, 02:57 PM

I soon learned that your program still uses the matrix to encrypt it. I have run it through my encryption / decryption / algebraic expressionizers, etc and gotten nowhere.

so do i get this correctly... your program takes the letter of the key corresponding to the letter of the text, and looks for the row that the first one matches, then counts over to the correct letter... and that is what it becomes?

fyodor · 04-14-2002, 03:11 PM

dont post, give us a few hours

04-14-2002, 12:55 AM	#2
blackwyvern Registered User Join Date: Jan 2002 Posts: 60	Myabe I am doing something wrong, but if I type anything in the console its says finished and closes... when I start the program it automatically starts up with improper use.
blackwyvern is offline

04-14-2002, 01:28 AM	#3
vasanth Its not rocket science Join Date: Jan 2002 Posts: 1,686	To open the encryption program first you have to go to dos prompt. From there you have to open the file encdec -enc to encrypt a given text and encdec -dec to decrypt a given text. For both you need to provide a key or a password.. Try this and tell me if you have more prolems. I want to see who can break my encryption program...
vasanth is offline

04-14-2002, 02:19 AM	#4
fyodor Registered User Join Date: Apr 2002 Posts: 200	im feeling lazy...give us some more ciphertext, its rather impractical to expect us to produce our own considering we do not know the key you used...100 or so characters __________________ I go to encounter for the millionth time the reality of experience and to forge in the smithy of my soul the uncreated conscience of my race. Windows XP consists of 32 bit extensions and a graphical shell for a 16 bit patch to an 8 bit operating system originally coded for a 4 bit microprocessor, written by a 2 bit company, that can't stand 1 bit of competition. Last edited by fyodor; 04-14-2002 at 02:30 AM.
fyodor is offline

04-14-2002, 02:39 AM	#5
vasanth Its not rocket science Join Date: Jan 2002 Posts: 1,686	Ok here is more cipher text you asked for WW ECA IC COII XG ZRHOJXY W ARH PLV CJI LVK GGCCVRBSZ KWWO VCQNCGIWKR EFKKVPA XY XG MJ HDI TLPVR HABK MKY PGGIU TKV XYJSN HDEK WP ZH RIIN AEJN PS RFWGB HDMJ SJGI NDPMFC OMERS MK WO MTFU SPGEG TJAR P YLZAR GRC XVVPY MK PQX X DEMT ISIT LPRCG XF PQMCS OXFDBCII SJGINDPMFC LVFVFWQJ WJ KWS JLIINI Ok i think this would do. The key i have used is really very simple. So i think even if you use brute force you should be able to break it within hours.. But brute fore is not the answer because it is childish.. But lets see who can break this first... The first person to break this i agree is a good cryptographer.....
vasanth is offline

04-14-2002, 06:29 AM	#6
shtarker Registered User Join Date: Jan 2002 Posts: 381	That encryption algorithm wouldn't be in any way similar to the one you posted a few threads back now would it? __________________ If you own a piece of land and there is an volcano on it and it ruins a nearby town, do you have to pay for the property damage?
shtarker is offline

04-14-2002, 07:01 AM	#7
vasanth Its not rocket science Join Date: Jan 2002 Posts: 1,686	Well it is almost the same but still differs a lot in may of the other ways....... If you encrypt the text in the one i posted before and in the new program i crated.. the output will be completely different.. But the logic of my new program is similar.. SO i have given you guys another clue.. Has any one atleast come up with something so far...
vasanth is offline

04-14-2002, 08:18 AM	#8
ErionD Pygmy Monkey Join Date: Feb 2002 Posts: 408	nope =P Perhaps its too good so that we can't solve it! Run away and make a fortune in the encryption business i say!
ErionD is offline

04-14-2002, 08:46 AM	#9
vasanth Its not rocket science Join Date: Jan 2002 Posts: 1,686	Hey dont make fun of my prog... I am sure you dint even try.. Please try... Because i want to find the loop holes in it.... I will post the source in the next 2 days if any one here asks for it Thanks Vasanth
vasanth is offline

04-14-2002, 10:06 AM	#10
vasanth Its not rocket science Join Date: Jan 2002 Posts: 1,686	There has been 112 views and just a few posts... Shall i post the soure and the key of the above ciphertext here.
vasanth is offline

04-14-2002, 10:36 AM	#11
Quantrizi I am the worst best coder Join Date: Mar 2002 Posts: 644	Dude, he really wasn't making fun of it.....just being a smart*** __________________ poems by me
Quantrizi is offline

04-14-2002, 10:40 AM	#12
vasanth Its not rocket science Join Date: Jan 2002 Posts: 1,686	So do you guys mean that it is now time for me to post the key and the source of my program..
vasanth is offline

04-14-2002, 12:11 PM	#13
blackwyvern Registered User Join Date: Jan 2002 Posts: 60	I tried, but it seems you used a multi-letter key, which does make it difficult for us to solve. Im sure if you took this to a real cryptography site, then you may receieve a lot more help on your project. PS. Im not putting you down at all, I say great job =)
blackwyvern is offline

04-14-2002, 02:57 PM	#14
Inquirer Rebooted Join Date: Apr 2002 Posts: 281	I soon learned that your program still uses the matrix to encrypt it. I have run it through my encryption / decryption / algebraic expressionizers, etc and gotten nowhere. so do i get this correctly... your program takes the letter of the key corresponding to the letter of the text, and looks for the row that the first one matches, then counts over to the correct letter... and that is what it becomes?
Inquirer is offline

04-14-2002, 03:11 PM	#15
fyodor Registered User Join Date: Apr 2002 Posts: 200	dont post, give us a few hours __________________ I go to encounter for the millionth time the reality of experience and to forge in the smithy of my soul the uncreated conscience of my race. Windows XP consists of 32 bit extensions and a graphical shell for a 16 bit patch to an 8 bit operating system originally coded for a 4 bit microprocessor, written by a 2 bit company, that can't stand 1 bit of competition.
fyodor is offline

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