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SUMMARY:Investigating obfuscation using quantum homomorphic encryption - F
 lorian Speelman\, CWI
DTSTART:20191128T141500Z
DTEND:20191128T151500Z
UID:TALK131590@talks.cam.ac.uk
CONTACT:Johannes Bausch
DESCRIPTION:The notion of obfuscation is a powerful idea in cryptography\,
  but the most ideal variant – Virtual Black Box obfuscation – is impos
 sible to achieve classically. Even though some other impossibility results
  in the quantum case have been found\, whether it’s possible to use quan
 tum information to obfuscate (classical) circuits is still an open questio
 n.\n\nFully homomorphic encryption is a key tool in many proposed construc
 tions involving obfuscation in the classical world. For instance\, it can 
 boost obfuscation of log-depth circuits to polynomial-size ones. Having in
  mind recent progress in quantum homomorphic encryption (QHE)\, it’s nat
 ural to ask in what way QHE might help us in the quest to obfuscate quantu
 m circuits.\n\nIn this talk\, I will give an overview of a research line i
 n progress: we try to find out whether QHE can boost the power of obfuscat
 ed classical circuits to the obfuscation of quantum circuits. I will sketc
 h the progress we have made\, and the technical obstacles that still remai
 n to fully solve this question.\n\nJoint work with Gorjan Alagic\, Yfke Du
 lek\, and Christian Schaffner.
LOCATION:MR9\,  Centre for Mathematical Sciences\, Wilberforce Road\, Camb
 ridge
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