3 Jun
2014
3 Jun
'14
7:53 p.m.
Dear Simon,
In message CAPnjgZ359pN2di57u2GQv5thOjayTMyXpkfz02HamqxvmdAMbw@mail.gmail.com you wrote:
Please correct me if I'm wrong - but while this can protect against software attacks, it cannot protect your system when someone has physical access, say with a JTAG debugger, correct?
That's correct - they could in that case just change the software in memory after it has loaded, perhaps involving some timing skill.
Or, even simpler, just halt the system and load aand run a version of U-Boot without any security restictions^H^H^H^H^H^H^Hfeatures.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
If it happens once, it's a bug.
If it happens twice, it's a feature.
If it happens more than twice, it's a design philosophy.