• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 31 subscribers
  • Views 267 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

MAKE DEVICE SECURE LM4F120

Francesco Betti
Intellectual 265 points
Other Parts Discussed in Thread: LMFLASHPROGRAMMER

Hi staff,

I'm using a launchpad as ICDI to program a LM4F120 mounted on another board.

In CCS Studio in the debug window->advaced there is the option "make device secure" but I can't click on this option.

How can I use this option?

Can I blow the fuse to make the device secure, using the LM Flash Programmer software?

Thank you and Best regards

  • 0
    Mastermind 7925 points

    Yes, It is a good idea to start with LMFlashProgrammer. 

    Regards,
    Maciej 

  • 0
    Guru 117855 points

    You may wish to note that, "Secure" - like beauty - very much, "in the eye of the beholder." 

    Very hard to make an MCU, "truly secure."  Security methods offered by this/other MCU vendors offer some protections - but are far from impenetrable. 

    Suspect that, "determined hacker" - armed with adequate time, funds, resources - will have your code if they desire.  (chips have been, "de-capped, x-rayed etc." - few secrets remain...)

    Again - this "security weakness" pervades most all MCUs - most all makers.  JTAG "fuse opening" will likely prove more of an inconvenience to you than a "pro hacker..."  (they laugh at that as a "defense...)

    Limited protection may keep "some" honest - that alone may have value.  But - do adjust your concept of, "security" to better accept today's reality...

    On a broader - yet similar note - too often the "regulators" have neither the "smarts, motivation, nor skills" to match those, "regulated!"   (FT Financial Times, WSJ - weekly if not daily - so report...)

  • 0 in reply to cb1_mobile
    Intellectual 265 points

    Hi,

    I have no doubt that an haker can take my code: my question was only refered to the CCS option (that I can't use and I don't know why) and if the JTAG fuse can be broken with the LMFlashProgrammer
    :)