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   REPLYADDR steveo@eircom.net   
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   MSGID: <20240211090742.5ebbe742856f54e5f40392bd@eircom.net> 8119f000   
   REPLY:  ccc1e44a   
   PID: SoupGate-Win32 v1.05   
   On Sun, 11 Feb 2024 08:58:50 +0000   
   The Natural Philosopher  wrote:   
      
   > On 11/02/2024 05:17, Ahem A Rivet's Shot wrote:   
   > > On Sat, 10 Feb 2024 23:13:20 +0100   
      
   > > 	The point of Ken Thomson's attack is that you have to compile   
   > > those gcc sources and that compiler can poison the binary you produce   
   > > from the clean gcc sources. So inspecting sources doesn't help you.   
   > >   
   > Obviously one must write one's own compiler!   
      
   	So what do you compile it with ? If the compiler you use to compile   
   your clean room compiler is poisoned then so will be the compiled compiler   
   despite your clean room code. That's the Thompson trap.   
      
   	The only way out of the Thompson trap is to write a new compiler   
   from scratch in assembler and assemble it by hand. Then you just have to   
   trust the hardware.   
      
   --   
   Steve O'Hara-Smith   
   Odds and Ends at http://www.sohara.org/   
   For forms of government let fools contest   
   Whate're is best administered is best - Alexander Pope   
      
   --- SoupGate-Win32 v1.05   
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