Many people cite Albert Einstein’s aphorism “Everything should be made as simple as possible, but no simpler.” Only a handful, however, have had the opportunity to discuss the concept with the physicist over breakfast.

One of those is Peter G. Neumann, now an 80-year-old computer scientist at SRI International, a pioneering engineering research laboratory here.

As an applied-mathematics student at Harvard, Dr. Neumann had a two-hour breakfast with Einstein on Nov. 8, 1952. What the young math student took away was a deeply held philosophy of design that has remained with him for six decades and has been his governing principle of computing and computer security.

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