Bank Clerk: Yes, right on that blank there. Please choose a pass code of six Numbers and confirm it.

银行职员：是的，签在客户栏。请您设置一个六位数密码并确认。

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In 1945, the defection of Igor Gouzenko, a code clerk at the Soviet embassy in Ottawa, and Elizabeth Bently, an American courier between the spies and the Soviets, plus the knowledge that at least some of their secret cables had been decoded, led to an almost total shut-down of the espionage apparatus in the United States.

ECONOMIST: History of espionage: Dark secrets | The