Karl [Carl]

A common pseudonym used for various purposes, for instance, as a Communist Party name or a “street name” employed by intelligence agents in their day-to-day operations.

According to Whittaker Chambers, an admitted Soviet espionage agent during the 1930s, “Karl” was one of the names he used while in the “Communist underground.” Chambers’s “street name” is commonly mistaken for an operational pseudonym, that is a cover name used by an intelligence service in its operational correspondence. However, it was ascertained only in March 2009 that Chambers’s Soviet operational pseudonym was “100th” (“Sotyi“).