35C3 -  The year in post-quantum crypto
Channel: media.ccc.de
Date: 2018-12-29

https://media.ccc.de/v/35c3-9926-the_year_in_post-quantum_crypto



  The world is finally catching on to the urgency
  of deploying post-quantum cryptography:
  cryptography designed to survive attacks by quantum computers.
  NIST's post-quantum competition is in full swing,
  and network protocols are exploring post-quantum extensions.
  This talk will take the audience on a journey
  through selected recent highlights
  from the post-quantum world.

  Post-quantum cryptography has become one of the most active
  areas in cryptography,
  trying to address important questions from potential users.

  Is post-quantum cryptography secure?
  In the first ten months of this year
  we have seen several serious breaks
  of submissions to the NIST competition.
  At this point, out of the original 69 submissions,
  13 are broken and 8 are partially broken.
  Are the remaining 48 submissions all secure?
  Or is this competition a denial-of-service attack
  against the cryptanalysis community?
  NIST will select fewer candidates for the 2nd round,
  but it is not clear whether there is an adequate basis
  for judging security.

  Does post-quantum cryptography provide
  the functionality we expect from cryptography?
  For example,
  the original Diffie-Hellman system
  provides not just encryption
  but also more advanced features
  such as non-interactive key exchange
  (not provided by any NIST submissions)
  and blinding.
  The era of post-NIST post-quantum cryptography has begun
  with the exciting new CSIDH proposal,
  which has non-interactive key exchange
  and is smaller than any NIST submission,
  but uses more CPU time and needs much more study.

  Is post-quantum cryptography small enough?
  Even for network protocols that rely purely on encryption,
  integration remains a major problem
  because of the bandwidth requirements of most post-quantum systems,
  especially the post-quantum systems
  with the strongest security track records.
  Experiments with integration of post-quantum cryptography into TLS
  have focused on encryption without post-quantum authentication.
  A new generation of network protocols
  has been designed from the ground up for full post-quantum security.

  Is post-quantum cryptographic software fast enough,
  and is it safe to use?
  Adding post-quantum cryptography
  to the cryptographic software ecosystem
  has produced a giant step backwards in software quality.
  Major areas of current activity include
  software speedups,
  benchmarking,
  bug fixes,
  formal verification,
  patent avoidance, and
  development of post-quantum software libraries
  such as Open Quantum Safe and libpqcrypto.

  The talk will be given as a joint presentation
  by Daniel J. Bernstein and Tanja Lange.

djb Tanja Lange

https://fahrplan.events.ccc.de/congress/2018/Fahrplan/events/9926.html