Australian Signals Directorate releases coin with secret code

I found myself remembering the adverts in woman's magazines in the 60s "if u cn rd ths u cld wrk in scrtrl srvcs for $ as a shrthnd tpst"

It's kind of sad people are posting partial solutions on reddit, I liked the idea we might honour the spirit of the game, (the "great game"?) -But I know in reality I too used the cheat codes, read the map to zork to get to the endgame.

Cryptonomicon readers probably have a good mental model of one particular scene. And, people who know how Bletchley park recruited some staff in ww2

Really, I think this is more good PR and a reminder "we exist" which happens from time to time. UCL in London was next door to a clutch of offices which had massive bomb-proof steel mesh curtains, and were said to be an outpost of an agency nobody wanted to name. They litter the landscape of most capital cities.

On the flip side it seems to have braille under some of the letters of "ELIZABETH II AUSTRALIA".

B = c / 3

T = b / 2

H = f / 6

A = a / 1

S = e / 5

A = d / 4

ATBASH?