Erica Klarreich

Contributing Correspondent

cryptography

Privacy by the Numbers: A New Approach to Safeguarding Data

December 10, 2012

A mathematical technique called “differential privacy” gives researchers access to vast repositories of personal data while meeting a high standard for privacy protection.

Mathematics

Getting Into Shapes: From Hyperbolic Geometry to Cube Complexes and Back

October 2, 2012

Thirty years after William Thurston articulated a grand mathematical vision, a proof by Ian Agol marks the end of an era in the study of three-dimensional shapes.