Is the gfp container secure?

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RocketRider
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Is the gfp container secure?

Post by RocketRider »

We are convinced that the gfp container format is secure. However, with this challenge you can prove us wrong.

The challenge is about decrypting the given media file without giving a password.
If someone can decrypt this media file, I will upload the complete sourcecode of the current version of the GreenForce-Player.

1) Download media file
2) Decrypt the media file
3) Send me the password or the decrypted video

What is the prize:
The complete sourcecode of the current version of the GreenForce-Player will be released to everyone.

GreenForce-Player
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Fluid Byte
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Re: Is the gfp container secure?

Post by Fluid Byte »

This challenge is pointless. The player has to read the file anyway. So you will just debug the player and check where password check/decryption occurs. No one will even bother looking at the files but rather for the decryption in your program.
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Thorium
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Re: Is the gfp container secure?

Post by Thorium »

Fluid Byte wrote:This challenge is pointless. The player has to read the file anyway. So you will just debug the player and check where password check/decryption occurs. No one will even bother looking at the files but rather for the decryption in your program.
Right, and then ripping the code and do a bruteforce attack on the file to get the password.
You can't do anything against a brute force attack except having long passwords and a slow encryption algo.
PB
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Re: Is the gfp container secure?

Post by PB »

> You can't do anything against a brute force attack

What about a Captcha in the password input routine?
I compile using 5.31 (x86) on Win 7 Ultimate (64-bit).
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Thorium
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Re: Is the gfp container secure?

Post by Thorium »

PB wrote: What about a Captcha in the password input routine?
Captchas are just annoying for the user and could be just patched out by a cracker.
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blueznl
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Re: Is the gfp container secure?

Post by blueznl »

Just the password wouldn't matter, but I guess if someone could return a proper unencrypted media file then that would make sense.
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