How does he know Alan Turing's cryptography formulas?!

Professor Namgung Dong-ho was so shocked his heart nearly leaped out of his chest.

Alan Turing.

Britain's great mathematician, and its ill-fated genius.

A single-minded eccentric who'd solved advanced math problems on his own without ever having learned calculus.

So gifted that he went beyond understanding Einstein's difficult theories to deriving Einstein's laws of motion for himself.

He'd mastered numerical analysis, probability, statistics and number theory. He'd published papers on the von Neumann computer architecture and founded the Turing structure that laid the groundwork for artificial intelligence.

Modern computer systems followed, to the letter, the principle of the universal machine Turing had created.

He was that brilliant. In 1966 the Turing Award—called the Nobel Prize of computer science—was established in his name, and he was called the father of computer science.

The accepted story was that Apple's logo, an apple with one bite taken out of it, had been designed in Turing's honor.

During World War II, he'd cracked Germany's unbreakable Enigma cipher and saved countless lives.

But after the war, he ran up against the prejudice of British courts and a society that treated homosexuality as taboo. He injected poison into an apple and took his own life.

And now the board was crammed with the advanced mathematical methods Alan Turing had used to break the code.

Tak, takatakatak.

Meticulous calculation and boundless mathematical thinking.

Alan Turing, who'd used brilliant intuition and combinatorics to crush an Enigma that spawned millions upon millions of combinations.

The chalk danced as if he'd come back to life.

It never stopped once.

Nobody could think like that without understanding it perfectly.

He really understands all of that?

Professor Namgung Dong-ho was seeing it and still couldn't believe it.

The Enigma decryption formulas he'd worked through as a PhD student in America were beyond any ordinary person.

You had to have mastered every area of mathematics—calculus, geometry, higher functions and the rest.

Professor Namgung Dong-ho had spent weeks wrestling with them alongside his fellow doctoral students.

They were the joint product of years of struggle by…