Using a code she had developed herself, Goldberg had obscured names, addresses, and other details the group would need for their trip in handwritten compositions that looked, to an untrained eye, like the real melodies she’d written on other pages of the book. Goldberg and her colleagues didn’t want to give away details to Soviet officials of who they planned to see and what they planned to do on their trip.

Read full article on Wired – Threat Level