zk-Snark references

• early-review-non-interactive-zk.pdf:
  Manuel Blum, Alfredo de Santis, Silvio Micali, and Giuseppe Persiano
  NONINTERACTIVE ZERO-KNOWLEDGE
  A classic review on non interactive zk-snark
• groth-updatable-crs-zk.pdf:
  Jens Groth, Markulf Kohlweiss, Mary Maller, Sarah Meiklejohn, Ian Miers
  UPDATABLE AND UNIVERSAL COMMON REFERENCE STRINGS WITH APPLICATIONS TO ZK-SNARKS
  First example of a semi-trusted setup with updatable CRS
• pinocchio.pdf:
  Bryan Parno Jon Howell, Craig Gentry, Mariana Raykova
  PINOCCHIO: NEARLY PRACTICAL VERIFIABLE COMPUTATION
  The first realistic snark, also sort of the boiler plate of other zk-snark protocols.
• plonk.pdf:
  Ariel Gabizon, Zachary J. Williamson, Oana Ciobotaru
  PLONK: PERMUTATIONS OVER LAGRANGE-BASES FOR OECUMENICAL NONINTERACTIVE ARGUMENTS OF KNOWLEDGE
  enhancement of sonic.
• sonic.pdf:
  Sean Bowe, Mary Maller, Markulf Kohlweiss, Sarah Meiklejohn, Ian Miers
  SONIC: ZERO-KNOWLEDGE SNARKS FROM LINEAR-SIZE UNIVERSAL AND UPDATABLE STRUCTURED REFERENCE STRINGS
  a fast, semi-trusted zk-snark
• supersonic.pdf:
  Benedikt Bunz, Ben Fisch, Alan Szepieniec
  TRANSPARENT SNARKS FROM DARK COMPILERS
  trustless setup version of sonic. slightly less performant