He tipped the traders on UBS analyst recommendation upgrades or downgrades, using secret codes sent on disposable cellphones.

FORBES: Helter-Skelter On Wall Street

Among other things, the principles established by his scholarship enabled espionage agencies to make their secret codes even more impenetrable and enhanced the security and accuracy of computer data transmission.

ECONOMIST: Andr�� Weil

This ability would allow a quantum computer to do the mathematical heavy-lifting required for, say, cracking secret codes, while even the fastest and most advanced supercomputers plod along on the same problem.

FORBES: Atoms Offer Giant Leap In Computing Power

Although they are decades from being practical, according to researchers, quantum computers may one day add previously unimagined computing power to such complex tasks as database-searching and breaking secret codes, tasks that now require powerful supercomputers.

FORBES: Atoms Offer Giant Leap In Computing Power

The SEC filed civil charges against the 14, describing two related schemes that featured kickbacks and extortion and methods used to disguise detection, including meetings at a storied New York City restaurant, disposable cellphones, secret codes and clandestine computer monitoring.

FORBES: Helter-Skelter On Wall Street

Hidden within the video are secret Elvish codes.

FORBES: Riddles in the Air: Guess What AirNZ Has in Its Pockets in Hobbit-themed Promotion

It is a place of ancient codes and secret symbols.

BBC: The perfect trip: China

Bletchley's role in breaking German codes was kept secret not just during the war but for decades after and only began to emerge in the 1970s.

BBC: Bletchley Park enigma code huts prepare for restoration

For example, records of violations of the Codes of Ethics mutual fund advisers are required to adopt, advisers are permitted to keep secret.

FORBES: Why the SEC Is In Danger of Becoming Irrelevant ( February 28, 2006 )