On Wednesday 24 June 2009 12:45:38 Detlev Zundel wrote: > > It is secure because only authenticated code is allowed to be > > executed, thus another step to avoid piracy, hacking of conditional > > access systems etc. > > Running only authenticated code does *not* ensure security, no matter > how much this is wished for. > > But no matter, I now understand that "security" seems to mean "data can > only be handled in the way intended by the owners of the data" which is > a different concept to me.
you ignored my simple straightforward example where both authenticity and security is provided. cpu only loads signed u-boot -- authenticity. u-boot only loads encrypted signed binaries -- security and authenticity. since the binaries stay inside of the CPU, for all practical (and then some) purposes, the decrypted binary will never be discovered from this system. and unless you're lumping data and code together under the term "data", that part is also incorrect. -mike
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