Hashing is used everywhere in computing and is getting increasingly important with the exploding amount of data. A summer school at the University of Copenhagen provided an in-depth introduction to hashing, both theory and applications. The topics ranged from modern theory of hashing, to actual implementations of hash functions that are both efficient and provide the necessary probabilistic guarantees. Application areas studied, included sketching and data bases, similarity estimation, and machine learning.

Slides and video recordings from the summer school are available now.  Neustar has a nice write up of the event.