Thoughts on PQC

[Robert J. Hansen]

> Actually, krytrons were an existing technology from high speed photography

According to the sources I've seen they were descended from military 
thyratrons, and were unknown prior to the mid-1940s. Wikipedia says they 
originated as one of the first products of the EG&G Corporation, 
established in 1947.

> Exploding bridgewires was also an existing technology used in "proximity
> fuse" secret artillery shells.

According to John Coster-Mullens' excellent _Atom Bombs: The Top Secret 
Inside Story of Little Boy and Fat Man_, EBWs were invented by future 
Nobel laureate Luis Alvarez and Lawrence Johnston specifically for use 
in early implosion weapons.

> Explosive lenses was the existing technology in certain destruction
> charges used by special forces and anti-tank weapons.

The first patent on explosive lenses is credited to John von Neumann, 
James Tuck, and Seth Neddermeyer.

Tuck's declassified CV from Los Alamos credits him as having devised the 
explosive lens in 1944.

https://ahf.nuclearmuseum.org/wp-content/uploads/2015/04/JamesTuck%20-%20C.V.pdf

Looking over Wikipedia's page on explosive lenses, no mention is made of 
its use in antitank weapons or demolition charges.

If you have contradictory sources I'd be happy to hear of it.
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