[A83] Re: apps
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[A83] Re: apps
I heard that the Ti83+ uses MD5 encription.
But what kind of encription is that? Does the calc check it against only
one build-in decoder-key, or what? You defenately don't get a "decode
string" to type in if you want to upload the newest ROM or a Flash App...
So how does it get the key? Is it 'hidden' inside the file you upload to
your calc? Would it be (relatively) simple to extract this key from your
Flash-App-file? Maybe 'collect' them, and look if you can extrapolate some
other keys from them?
And how does it get "signed"? Do you have to send your assembler-output to
Ti, so they create a Flash App for you? (with all the stresses that they've
put the wrong name on your App, etc. etc.)
Or do you get a (DOS/Win32) program to sign it yourself, when you buy the
SDK? Wouldn't it be possible to use that program again? Do you have to give
a separate key to the program, or does it have only one "hardcoded" key?
Does your Ti83+ check if you have Apps with the same key on your calc?
Anyways, there might be simpler options then brakeing ?the? code.
Just some thoughts...
Henk Poley
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