[RC5] My head is going to explode...

Joe Zbiciak j-zbiciak1 at ti.com
Wed Nov 19 07:33:19 EST 1997


'gindrup at okway.okstate.edu' said previously:

|      Well, *actually*...  As Dennis Ritchie has pointed out, some early 
|      versions of logind and cc contained code to implement a backdoor in 
|      the login.  cc had been altered to recognize logind's source and 
|      introduce the backdoor.  cc had also been altered to recognize it's 
|      *own* non-backdoored source and introduce the recognizer backdoors.


Actually, that was Ken Thompson.  Please see "Reflections on Trusting Trust",
ACM Society Classic of the Month, Sept 1995.  (Originally printed in 
_Communication of the ACM_, Vol. 27, No. 8, August 1984, pp. 761-763.)

       http://www.acm.org/classics/sep95/

Finally, one of the True Paranoids speaks.   :-)

It was never determined if Ken was telling a story, or if he actually
did perpetrate the hack.  He does credit a since-gone-missing Air Force
memo as inspiring the idea.

Regards,

--Joe

-- 
 +------------ Joseph Zbiciak -----------+ 
 |- - - - -  j-zbiciak1 at ti.com  - - - - -|   You have the capacity to 
 | - http://www.primenet.com/~im14u2c/ - |   learn from mistakes.
 |- - - -Texas Instruments, Dallas- - - -|   You will learn alot today.
 +------#include <std_disclaimer.h>------+ 
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