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1  Using Arduino / Project Guidance / Re: Play only Proprietary Sound Files on: October 08, 2012, 11:02:49 am
Thank you justjed and pylon (and others), for your very straight forward and honest opinions! IT IS HIGHLY APPRECIATED! smiley
As of now, we're not sure about taking this "proprietary" thing to the next step. But with your insights, we have something to research, and defend in the future.

Thank you anyways, and I hope to be part of the arduino community anytime soon. Consider this case/question closed. smiley-grin
2  Using Arduino / Project Guidance / Re: Play only Proprietary Sound Files on: October 07, 2012, 09:17:53 am
Hello pylon, is it not possible to do it in Arduino? Because we have to make do with what we have right now, which is an arduino.

Maybe there is a simpler approach for it instead of making crpytographic libraries? And also we're planning to minimize the sound file to couple of seconds to minimize the size ( 100kB < size < 1MB )...
3  Using Arduino / Project Guidance / Re: Play only Proprietary Sound Files on: October 05, 2012, 05:27:22 am
Sorry for the delayed reply.

@Grumpy_Mike - at first .WAV was an option, but now its fixed to an MP3 player.

@PeterH -
You're trying to restrict the device to only play media files that come from you?

You're trying to ensure that no other players can play the media files you create?
Yes and Yes.

what lengths are you willing to go to to prevent people from overcoming your restrictions?
I'm willing to create a script (for encrypting in PC) and sketch that makes use of already existing cryptographic libraries.

I forgot to mention that the proprietary sound file should only be played with one dedicated player (for proof of concept).
e.g. a sound file (SOUND_1.*) can only be played with DEVICE_1 (arduino + mp3 player) and should not be usable/playable with DEVICE_2.
SOUND_1.* is the encrypted propietary sound file. DEVICE_1 and DEVICE_2 are the hardware projects. smiley

I'm thinking that this maybe achieved by assigning IDs to the SOUND file before encryption, which is paired with only one DEVICE.
4  Using Arduino / Project Guidance / Play only Proprietary Sound Files on: September 24, 2012, 01:52:53 am
First, I know that "proprietary" is kind of an eye sore, but this is just a project so please bear with me.  smiley-lol

The project makes use of an Arduino, an Music player IC (Mp3 or MIDI maybe), SD, and a speaker. Basically, the system should only play "proprietary" sound files stored in the SD. The questions is, how can I easily achieve this? (I'm thinking of a PC script to encrypt "proprietary" sound files, then in the Arduino, it checks first if it is properly encrypted.)

But I don't have a concrete approach yet on how to achieve this, (e.g. do I need to encrypt the whole file, what library may be used, etc.).

Thanks in Advance! smiley
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