Explore a cryptographic research paper presented at Crypto 2017 that introduces a new distribution sensitive secure sketch and popularity proportional hashing. Delve into the concepts of online and offline attacks, relaxed checking, secure sketch, sketch-assisted checker, and popularity proportional hashing. Learn about the innovative approaches proposed by researchers Joanne Woodage, Rahul Chatterjee, Yevgeniy Dodis, Ari Juels, and Thomas Ristenpart to enhance security in cryptographic systems.