Explore the concept of indistinguishable proofs of work or knowledge in this Asiacrypt 2016 conference talk. Delve into the motivation behind pricing functions and privacy-preserving contributions in cryptography. Examine algorithms, work construction, and puzzles related to this topic. Discover potential applications and draw insights from the conclusions presented by speakers Foteini Baldimtsi, Aggelos Kiayias, Thomas Zacharias, and Bingsheng Zhang.