Mr. Typewriter, Martin K. Tytell, has passed away. His work intersected with information security, as explained by the NYT:

Hiss had been convicted largely because the government presented expert testimony maintaining that the documents passed to Chambers were written on a typewriter owned by Hiss and his wife, Priscilla. At his sentencing, Hiss famously accused Chambers of committing “forgery by typewriter.”

Afterward, to prepare for an appeal, Hiss’s lawyers hired Mr. Tytell to build a typewriter whose print pattern would be indistinguishable, flaws and all, from that of the Hisses. It took him nearly two years, but he succeeded. His work became the foundation of Hiss’s plea, ultimately unsuccessful, for a new trial and, after his release from prison in 1954, of the debate over his guilt, which goes on to this day. Hiss died in 1996.

I rarely see his name mentioned today, but hopefully he will continue to be recognized for his amazing gifts and his contributions to our work.