Date: Thu, 11 May 2017 03:18:19 -0400 (EDT) From: Guevara Noubir Subject: Privacy-Preserving Longevity Study of Hidden Services Dear Tor Safety Board members, We have a collaboration between three teams, Erik Blass (Airbus), Aziz Mohaisen (University of Buffalo), Guevara Noubir (Northeastern University), and have been working on the design of a privacy-preserving study of the lifespan of hidden services. Please find attached our proposed design. We look forward to your feedback. Best regards, Guevara