Schachter and Ceglowski’s "LOAF", or List of all Friends, was a way to distribute a random projection of your email contacts publicly and anonymously. It was b

Schachter and Ceglowski’s "LOAF", or List of all Friends, was a way to distribute a random projection of your email contacts publicly and anonymously. It was based on Bloom filters and actually I learned of Bloom filters by hearing Schachter's talk on LOAF at Eyebeam long ago. Basically you distribute the projection in an email header or signature and the recipient can probe it to see if they might have any contacts in common.