My Encrypting/Decrypting Program + challenge

The fear of every surveillance society: citizens protecting their own privacy with strong cryptography

My Encrypting/Decrypting Program + challenge

Post by learnzndy on Thu Feb 02, 2012 5:49 pm
([msg=64092]see My Encrypting/Decrypting Program + challenge[/msg])

I made a program in Visual Basic that encrypts one line of text (one line, but tested with very very long text an it worked fine) with my original agorithm, and decrypts it back.
Image
You can download it here: http://www.mediafire.com/?vc6en3u3l505l2r

Challenge: Give me feedback about this algorithm/program, your opinion about it, hints how to make it better, more secure etc.

Note: This IS challenge because program has password, so you cannot use program if u dont break it :).
Image
If someone realy cant break it, ask me, ill give it to you.

I'm now learning Ruby, so im planning to make better version with similar algorithm in Ruby for practical use.

Thanks in advance!
Among programming, im learning english language too, so hope you understand me.
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Re: My Encrypting/Decrypting Program + challenge

Post by limdis on Thu Feb 02, 2012 8:11 pm
([msg=64093]see Re: My Encrypting/Decrypting Program + challenge[/msg])

This is pretty cool. I shall start now
"The quieter you become, the more you are able to hear..."
"Drink all the booze, hack all the things."
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Re: My Encrypting/Decrypting Program + challenge

Post by learnzndy on Thu Feb 02, 2012 10:13 pm
([msg=64095]see Re: My Encrypting/Decrypting Program + challenge[/msg])

Big thanks for participating! + When you or someone else finish the password stuff,you can post comments here in CryptLine encrypted text, that would be fun! 8-)

Hint: Don't bruteforce.
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Re: My Encrypting/Decrypting Program + challenge

Post by tucak on Fri Feb 03, 2012 1:08 pm
([msg=64100]see Re: My Encrypting/Decrypting Program + challenge[/msg])

.y55565z5c6q626fhei9yz3m3frbrtrwgzgog1?h?ia9a0a!qzqoq1fhfifbfyf9.k9f9.989t9wkjo.71t0qn?4jbsfmgu8!7m9thpl95 tj6?b!c3omgsk8!md.5js668diuqsy9diowgkzqevb,jg a2z?0!3!mw39,,3.9hju.!.mor10n1nd,jv!i0!qfmwtey1dadcvs64btjw59f?vaegb97mv.58,!392?s!80gazh3mr,lgmyu2iiv2n48vt6zb?9?zmxjf992?xf,ae1c?.onsc!e4bnams9zfaoyzjud?.z
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Re: My Encrypting/Decrypting Program + challenge

Post by TheBeanhacker on Fri Feb 03, 2012 3:26 pm
([msg=64101]see Re: My Encrypting/Decrypting Program + challenge[/msg])

give me a tip as to how to crack this password please coz i was going to set about making my own VBScript ascii encoder/decoder and i just cant be bothered
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Re: My Encrypting/Decrypting Program + challenge

Post by learnzndy on Fri Feb 03, 2012 4:52 pm
([msg=64102]see Re: My Encrypting/Decrypting Program + challenge[/msg])

Code: Select all
ei...k.c40wswg6a6n58505i5m,6,1,?  a2bqbxb9bvby9r9u9ey0?vr5u4p1oz3.3qimmhhxhs!i!mzuzp3d7k?qu,  ro.at,!fa,7ad.8w4hhha ttqliix1fga65z,rtuhp0ij?rd0onb,d51b 1k7l8g0tqglk0j6ha2tk,04fc810b,l58t njp9yq41?5m2r4fy2wu8c5f2rpnc8mmr4i8wo2i9h5a  j6ldg,inqt56crjt7n83rtnkkif.x,!nc040,ptgossof3yq3s7qeqxr38!equmcb?di2rwa43.xw6!lisu8!oqzll2zp,k2mqr43z68etvcx2bcc0?w ,yhdwem6t9iwec3c,rp3rj7,8s?4xk8v.f4a,v?6kgg4qojvb8sb0kx?5yygmp c6i!muh5nfzxg!koaz8kuqvfbp?z70kb.gpfh3ezmzvtdt

@TheBeanhacker
1. Tip: Don't crack the password. I think that is impossible to do if you dont know what program actulay does.
2. Note: This is not ASCII encoder/decoder, this program just make text of lowercase letters, numbers and " ,.!?" unreadable without possesion of this program. So maybe it is not what you are looking for.
3. Lesson: Why dont you write it yourself? 3.1. It is fun. 3.2 You know the best what you want. 3.3. Its the great way to learn programming. 3.4. Many ppl can download my program now, so it is now useles and unsecure for private messaging.
4. What i have learned (My lesson): Dont write it in VB, or if you do, lock archive that contains it, dont put password in the program.

If you still want it and didnt crack it until tomorrow, ill give you the password. Cheers
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Re: My Encrypting/Decrypting Program + challenge

Post by tgoe on Fri Feb 03, 2012 8:36 pm
([msg=64105]see Re: My Encrypting/Decrypting Program + challenge[/msg])

Hey, thanks for sharing! Sorry I have to be a dick, but I think there's a slippery slope here. Public, encrypted communication on the forum is essentially a way to avoid moderation. I've opened a thread in the private staff area about this. Please refrain from publicly posting encrypted communication until there's official word about it.

btw, Nemanja, don't forget to clean your binaries of identifying info. :)
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Re: My Encrypting/Decrypting Program + challenge

Post by limdis on Fri Feb 03, 2012 9:40 pm
([msg=64106]see Re: My Encrypting/Decrypting Program + challenge[/msg])

tgoe wrote:btw, Nemanja, don't forget to clean your binaries of identifying info. :)


lol yeah I saw that too, you beat me to the comment :D
"The quieter you become, the more you are able to hear..."
"Drink all the booze, hack all the things."
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Re: My Encrypting/Decrypting Program + challenge

Post by learnzndy on Sat Feb 04, 2012 11:34 am
([msg=64113]see Re: My Encrypting/Decrypting Program + challenge[/msg])

tgoe wrote:Hey, thanks for sharing! Sorry I have to be a dick, but I think there's a slippery slope here. Public, encrypted communication on the forum is essentially a way to avoid moderation.
Posting whit encryption when there is a decrypter in the very same thread would not be clever way to avoid moderation.

tgoe wrote:btw, Nemanja, don't forget to clean your binaries of identifying info.
1. Yeah, i saw that too, but i don't know how to clean those.
Can someone tell me how to do that?
2. How dangerous this informations are? Is this my last chance to switch to Ubuntu?

Again, topic is:
:arrow: Your opinion about encrypting algorithm and program?
:arrow: How to make it better and more secure?

I am total begginer, so please, be more educational.
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Re: My Encrypting/Decrypting Program + challenge

Post by limdis on Sat Feb 04, 2012 11:53 am
([msg=64114]see Re: My Encrypting/Decrypting Program + challenge[/msg])

learnzndy wrote:I am total begginer, so please, be more educational.

On this topic I am too, I only recently got into coding and starting the application missions. I'm actually still trying to get (or) around your password prompt lol. But I don't want any hints just yet.


How dangerous is this information?
I have looked into some forensic examples and have seen it as bad as finding originating locations (IPs for example), creation time stamps, names, and even modification times. Being I don't know a lot about coding just yet, I can suggest using a hex editor (that is how I saw it), and null that information out before you distribute. The line in question starts at 6A04:43.
From what I can see, tgoe might have found something else, that is all that is listed that you would want to get rid of.
"The quieter you become, the more you are able to hear..."
"Drink all the booze, hack all the things."
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