[Busec] Tomorrow at 11: Ian Miers

Leonid Reyzin reyzin at cs.bu.edu
Tue Feb 21 17:04:19 EST 2017


*Presenter:* Ian Miers

*Date: *Wednesday Feb. 22 (tomorrow)

*Website:* http://cs.jhu.edu/~imiers/



*Talk Title*: Ignorance is Bliss: using cryptography to build systems with
nothing to lose

*Abstract: *As social and financial interactions move online, computers
store and compute on increasing amounts of sensitive personal information.
While cryptography has offered us many theoretical tools to allow
privacy-preserving computation on secret data, industry routinely uses
cryptography merely to address basic threats such as third-party
eavesdropping. This poses a problem, as there appears to be an increasing
consensus -- even in industry -- that it is risky to trust service
providers with access to this information. To address this, we need systems
that provide useful features that users expect, but do not expose
information to theft even when the provider is fully malicious. This
approach does more than protect user privacy: if the system is ignorant of
both data and cryptographic keys, system security may reduce to a simple
matter of detection and re-initialization. In this talk, I will explore the
challenges in building “intentionally ignorant” systems by examining the
design of Zerocash, a deployed anonymous alternative to Bitcoin, and
cryptographic attacks arising from failures in the design of Apple’s
iMessage end-to-end encrypted messaging service.

*Time and Location*: 11:00AM, Hariri Seminar Room
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