Catapult Firmware Engineer and the brains behind the Inertial Movement Analysis (IMA) algorithm, Glenn McIntosh, is the first person to correctly solve a Questacon code that has been unsolved since March.

Glenn submitted the first correct solution to the code, embedded in Questacon’s NKRYPT outdoor exhibit. He wins a 12-month family membership to Questacon and a hot air balloon ride for two.

The Centenary Code Challenge was announced in March this year with the NKRYPT exhibit to provide a lasting memento of the Centenary of Canberra at Questacon.

The first obstacle was to identify which of the exhibit’s 60 interlinked codes and ciphers, laser cut into eight pillars, was the Centenary Code. Glenn expressed his elation at solving such a complex code.

“I heard about NKRYPT while in Canberra in early February so I haven’t yet seen it in person,” Glenn said. “I worked from images posted online and found the key was latitude and longitude coordinates. It was trial and error from there. I didn’t know for quite a while that it was the Centenary Code.

“I’ve been interested in secret codes since I was a child. There’s a special feeling of elation in solving any elegant puzzle, a sense of completeness. I think that’s the addictive part.”

Questacon’s creator of the NKRYPT codes, Dr. Stuart Kohlhagen, congratulated Glenn on his achievement.

“This exhibit has generated significant interest amongst a small but dedicated group of amateur code breakers working together on tackling the codes,” said Dr Kohlhagen.

“It’s gone well beyond Canberra, with people involved from across Australia and also America and Indonesia. This group has collaborated via social media and their NKRYPT website has received over 6000 views.

“It’s great to see the prize going to an Australian—and I expect Glenn has earned significant kudos from the other code breakers,” said Dr Kohlhagen.

Catapult wishes to congratulate Glenn on his remarkable achievement!

Below is the revealed code. Do you think you would’ve solved it?


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