Dear Mahendra Dobariya, In message <bay176-w171ccc856593ba0f7380dc90...@phx.gbl> you wrote: > > hello,,I am from India.I am electronics hobbyist.currently I am using > beaglebone black in my project.and I am afraid of security of linux > systemits quite easy to copy or modify data from linux system if it > has physical access.lets say ,I have BBB , and I boot it from > external device(like external mmc ). and mount internal emmc then > modify shadow file. and then boot from internal Emmc. now I will get > root access , and I can modify anything on the system.
If you cannot prevent physical access, you cannot prevent one from taking full control over your hardware. If needed, I'll attach a JTAG debugger and run my own version of U-Boot that circumvents all security measures you installed in yours. 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: w...@denx.de There are three things I always forget. Names, faces - the third I can't remember. - Italo Svevo _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
