If you were writing up a bio of yourself on your company website would you refer to yourself as "Wizard" or "Deep Throat"? 

Here's the timeline of Ed Scheidt's nicknames -- Webster originally referred to Scheidt as the "Wizard of Codes" but somewhere, the wires got crossed, someone confused CIA Director William Webster with journalist Bill Gertz and Scheidt started to refer to himself using Bill Gertz's "Deep Throat of Codes" nickname!

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8 April 1991 - Bill Gertz in the Washington Times -- 

Mr. Sanborn told the AP the message was written by a retired CIA cryptographer, which would seem to rule out Mr. Clancy. The sculptor and the Deep Throat of codes conducted business only at secret locations, never by telephone or in writing.

https://kryptos.groups.io/g/main/message/682 -- 2 Nov 2003 

...  One of the Kryptos pictures from the
dedication ceremony in November 1990 was signed by William Webster, where he called
Ed the "Deep Throat of Codes".  ;)

TecSec website, 21 April 2015 --  https://web.archive.org/web/20150421141918/http://www.tecsec.com/about.html

Webster referred to Scheidt as "The Deep Throat of Codes."

John Schwartz 19 July 1999 The Washington Post

The agency put him in touch with Ed Scheidt, the retiring chairman of its Cryptographic Center, and hailed by then-director William Webster as "The Wizard of Codes."