The informational plaque is on the wall behind Pillar 1. It is entirely in English and appears to not contain any encrypted text.
The left plaque reads:
NKRYPT comprises eight stainless steel columns incised with coded messages represented as numbers, letters and graphic elements.
The name NKRYPT is derived from the Greek word 'kruptos', which means hidden. Designed by Dr Stuart Kohlhagen PSM, this enigmatic exhibit will challenge even the keenest code-breakers for years to come.
NKRYPT was launched by
The Hon. Kate Lundy
Senator for the Australian Capital Territory
4 March 2013
Australian Government logo, Questacon logo
The right plaque reads:
Decipher the veiled meaning
Renown awaits you
is found in all the rest.
One code within NKRYPT celebrates Canberra's Centenary.
Be first to decipher it and win a great prize.
For more information: www.questacon.edu.au
The 2nd, 3rd, and 4th lines of this informational plaque are a Haiku poem.