« previous next »
Pages: 1 ... 5 6 [7]   Go Down

Author Topic: Bypassing TI-Nspire RSA signatures now possible?  (Read 33557 times)

0 Members and 1 Guest are viewing this topic.

Offline Munchor

  • LV13 Extreme Addict (Next: 9001)
  • *************
  • Posts: 6199
  • Rating: +295/-121
  • Code Recycler
    • View Profile
Re: Bypassing TI-Nspire RSA signatures now possible?
« Reply #90 on: April 13, 2011, 07:56:08 am »
Quote from: Lionel Debroux on April 13, 2011, 07:54:53 am
Indeed, it's so far beyond the state of the art. TF could yield something, but with hopelessly remote chances of success.
However, don't forget that we do have arbitrary code execution on OS 1.1 to 2.1, which enables launching other OS without installing them ("RunOS") :)

2048 bits :( Someone said, I totally have to second, "Bypassing it has gone from impossible to impossible".
Logged

Offline Jim Bauwens

  • Lua! Nspire! Linux!
  • Editor
  • LV10 31337 u53r (Next: 2000)
  • **********
  • Posts: 1881
  • Rating: +206/-7
  • Linux!
    • View Profile
    • nothing...
Re: Bypassing TI-Nspire RSA signatures now possible?
« Reply #91 on: April 13, 2011, 11:00:34 am »
Correct me if I'm wrong, but I think that the size of the RSA signature doesn't make that you can't bypass it...
Bypassing the RSA signature makes that you don't need the RSA signature to run code.

(I hope I'm not making a fool from myself)
Logged

Offline BrownyTCat

  • LV6 Super Member (Next: 500)
  • ******
  • Posts: 420
  • Rating: +37/-8
    • View Profile
Re: Bypassing TI-Nspire RSA signatures now possible?
« Reply #92 on: April 13, 2011, 11:04:47 am »
Algorithms? Ack, I hate how protective TI is- whilst they barely make any use of the ARM processor we spent $100 on.
Logged

Offline mikehill2003

  • LV5 Advanced (Next: 300)
  • *****
  • Posts: 279
  • Rating: +13/-4
    • View Profile
Re: Bypassing TI-Nspire RSA signatures now possible?
« Reply #93 on: April 13, 2011, 12:40:17 pm »
Quote from: jimbauwens on April 13, 2011, 11:00:34 am
Correct me if I'm wrong, but I think that the size of the RSA signature doesn't make that you can't bypass it...
Bypassing the RSA signature makes that you don't need the RSA signature to run code.

(I hope I'm not making a fool from myself)
Completely correct. It's not any less possible for us to crack 2048-bit then it is for us to crack 1024-bit RSA. It's more likely to rain frogs then it is for us to factor even the 1024-bit RSA keys. That's the beauty of RunOS/OSLauncher, it bypasses RSA completely.(well, except for installing and then rebooting)
Logged
Pages: 1 ... 5 6 [7]   Go Up
« previous next »