Thanks to critor of Omnimaga for this news
Quote:
TI has released OS 2.1 for the TI-Nspire and the TI-Nspire CAS.
The OS has allmost no new feature for the user. And strangely, TI has made great annoucements on their site...
I thought there were something suspectfull...
And unfortunately there is!
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Once you have installed OS 2.1 on your TI-Nspire ClickPad or TouchPad, you can't downgrade any more to OS 1.6 or older. So you can't use Ndless any more.
I've made many tests this evening, and I found no way to bypass that protection.
Strangely, the included boot2 is the same (1.4.1571). May be the protection has allready been there for a long time, and has just been activated by OS 2.1. Installing a 1.7/2.0 OS doesn't disable the protection. Even the maintenance menu, with "remove OS" or even "complete reformat" doesn't help.
For more information, just Google-tranlate (french):
* my news on TI-Bank ->
http://ti.bank.free.fr/index.php?mod=news&ac=commentaires&id=837
* my tests on the TI-Bank forum ->
http://tibank.forumactif.com/actualites-f25/os-21-sorti-t5803.htm
(Nitpick: critor does attend Omnimaga, but he's originally from TI-Bank đ )
This majorly sucks, obviously.
Lionel Debroux wrote:
(Nitpick: critor does attend Omnimaga, but he's originally from TI-Bank đ )
This majorly sucks, obviously.
Most definitely. Is there still a possibility that a downgrade workaround might be found, or is it unlikely?
Has anyone managed to decrypt this OS? We should check. This kind of code must be locatable. Does the thing run in Goplat's emulator?
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Unfortunetly, the key codes for nspire OS's are about 1000 times harder and would require 1e16 computers
Just thought I would put this over here
qazz42 wrote:
Unfortunetly, the key codes for nspire OS's are about 1000 times harder and would require 1e16 computers
Oh, and Kerm, I think you are a bit late on this news. considering my previous topic đ
This topic was started a week ago. Also, please don't quote cryptography and cryptographic factorization statistics unless you know what you're talking about.
Kerm, I actually kinda do know what these statstics mean
qazz42 wrote:
Kerm, I actually kinda do know what these statstics mean
Oh, ok, it sounded like you just pulled the 1e16 computers figure out of thin air. Where did you get that number from, out of curiosity? And note that the sieved factorization method can only be parallelized for about half its runtime, while the remaining work must be done on a single computer.
Pff, 1E16, I meant 1E6
I dont remember where
Something I do know is that these are 1024 bit keys, it would be impossible to crack those :/
So, that is not an option, just look how long it took to factorize the TI-84 Keys
qazz42 wrote:
Pff, 1E16, I meant 1E6
I dont remember where
Something I do know is that these are 1024 bit keys, it would be impossible to crack those :/
So, that is not an option, just look how long it took to factorize the TI-84 Keys
Indeed. Academically, even 768-bit RSA has been only sorta-factored, and 1024-bit RSA is still nowhere near close to feasible.
So, taking apart teh OS is completely out of the question
No, we can disassemble and look at the OS with relative ease. What we need those keys for is sending our own OS and boot2 to the Nspire
Oh, right, sorry. Had a lasp of stupid
And shortly after TI's vicious move, Nleash has unlocked the protection. As added bonuses, both consequences of TI's move:
* Nspire (CAS) Touchpad can now be downgraded too, although older OS versions don't handle the new Touchpad keyboard (see on TI-Bank how to proceed nevertheless with Nspire Clickpad keyboards);
* by chance, an effect on the Press To Test LED was found, so it's likely that the LED is fully documented some day, and we can tamper with it đ
First they ignore you [they did ignore programmers' wishes], then they laugh at you [not sure they did đ], then they fight you [they sure do !], then you win [when the PTT LED has been thoroughly tampered with, and even more so when such features as running the CAS OS on the non-CAS models are released].
The more they fight us, the angrier they make us, the more knowledgeable we become about the Nspire we get, and the more likely they are to lose.
Congrats, Lionel. The PTT LED is the one that indicates the calculator is in a special test mode? I admit I'm not too familiar with the Nspire, more by choice and disgust than anything else.
I'm not quite sure I deserve congratulations, since I did nothing related to Nleash proper
đ
Quote:
The PTT LED is the one that indicates the calculator is in a special test mode?
That's it đ
KermMartian wrote:
Congrats, Lionel. The PTT LED is the one that indicates the calculator is in a special test mode? I admit I'm not too familiar with the Nspire, more by choice and disgust than anything else.
Disgust? Now let's not be to insultting đ
And as for the LED, if we can use it in games, that would be cool.
RED= Low HP
Yellow= Medium HP
Green= High HP
Flashing= Item near...
Hehe, how do you represent a "greedy" LED? đ That's not bad, is it indeed a tricolor or RGB LED? That sounds like it could have some fairly fun uses if unlockable.
